Kazakhstan journal for oil & gas industry
Научно-практический рецензируемый журнал Включен в список публикаций, рекомендованных комитетом по обеспечению качества науки и высшего образования Министерства науки и высшего образования Республики Казахстан для публикации основных результатов научной деятельности (приказ от 01.03.2023 № 152). Главный редактор: Утеев Рахим Нагангалиевич, PhD (геология) Индексация: Google Scholar, Ulrich Periodicals Directory, WorldCat. Открытый доступ и периодичность: Platinum Open Access; 4 выпуска в год (ежеквартально). ISSN: 2707-4226 (Print) ISSN: 2957-806X (Online)
Authors who publish with this journal agree to the following terms: Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licensee (CC BY-NC-ND 4.0) that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access). All the Copyright statements for authors are present in the standart Publishing Agreement (Public Offer) to Publish an Article in an Peer-review science journal 'Kazakhstan journal for oil & gas industry'. READ the details online (tap to see in details) Publishing Agreement (Public Offer) to Publish an Article in an Academic Periodical 'Kazakhstan journal for oil & gas industry' KMG ENGINEERING LLP, represented by Renat G. Khayretdinov (hereinafter referred to as the Publisher), on the one hand, offers an indefinite circle of persons (hereinafter referred to as the Author), and on the other hand, hereinafter jointly referred to as the parties, to execute this agreement (hereinafter referred to as the Agreement) on the publication of scientific materials (hereinafter referred to as the Article) in a scientific journal “Kazakhstan journal for oil & gas industry” (further-the Journal) in accordance with the conditions stated below. 1. General Provisions This Agreement is a public offer (hereinafter referred to as the Offer) requiring full and unconditional acceptance (Acceptance), which means the sending by the Author of his/her materials by way of uploading the same to the online electronic system designed to accept manuscripts for consideration, and subsequently posted in the corresponding section of the Journal’s website on the Internet information and telecommunications network (hereinafter referred to as the Internet). Regarding the observance of copyright on electronic information resources, all materials found in the website, including submitted electronic journals, may not be reproduced in whole or in part in any form (electronic or printed) without the prior written consent of the Publisher. Prior consent can be given by publishing an article in the open access and expressing the appropriate permission, which is in the form of an open Creative Commons license in the designated section of the journal’s website (where the published materials are placed) on the Internet. The journal requires license users to reference the original source, i.e., the publication, if the Author permits use of the public materials in the context of other documents. 2. Terms used in the Agreement “Author” refers to an individual (or individuals) whose creative work has led to the creation of the manuscript of a scientific article. “Manuscript” of the article in the journal is the result of conducting fundamental and applied scientific research in the form of scientific material, review of a scientific material, a scientific report, a bibliographic review on certain topics of scientific research, and a historical reference devoted to figures of science, which is then submitted by the author for publication in the journal. “Offer” is the document (an offer to the author) for the publication of an article by posting it on the journal’s website on the Internet. “Publication” is the placement of an article in the journal. “Article” is the manuscript of the article that has passed the reviewing, editorial and publishing process. “Acceptance of the offer” refers to the full and unconditional acceptance of the offer on the terms specified in paragraph 3 of this agreement (the author accepts offer by sending a Submission to the publisher, uploading the manuscript of the article, along with accompanying materials, to the online electronic system designed to accept articles for consideration, which is then posted in the corresponding section of the journal’s website on the Internet). “Journal” is a scientific peer-reviewed journal registered as a mass media entity. “Submission” is an electronic appeal of the author to the publisher for the publication of an article in the journal by uploading the manuscript and accompanying materials to the online electronic system designated for accepting articles for consideration, and subsequently posting them in the corresponding section of the journal’s website on the Internet). “Publisher” refers to KMG ENGINEERING LLP, which is the founder and publisher of the journal. Article metadata includes the materials in Russian and English that are intended for inclusion in International Scientific Databases (ISD), namely the following: title of the article; information about each of the authors (surname and first name; patronymic; place of work with the postal address indicated, contact information (e-mail, address, phone); abstract; keywords; thematic rubricator: UDC (Universal Decimal Classification) or other library and bibliographic classification and subject indexes; bibliographic list (list of references). “Editorial board” is the creative team that prepares the journal for publicationl; “Editorial Council” is an advisory body under the editorial board of the journal; “Parties” refers to the author and the publisher; “Author Guidelines” are the requirements for materials published in the journal, posted in the authors section of the journal’s website on the Internet. 3. Subject of the Agreement (Offer) Under this agreement, the Author grants the Publisher free of charge for the entire period of validity a non-exclusive license to use the Article created by the former for publication in the Journal, as well as the rights to use the article in the following ways: Reproduction of the Article or its sections or parts, as well as the metadata of the Article in Russian, English or other languages, in any material form, including on paper and electronic media, as a separate work in journals and/or databases (local or in the Internet) of the Publisher and/or other persons, at the discretion of the Publisher; Distribution of the Article or its sections or parts, as well as the metadata of the Article in Russian, English or other languages, on any medium. as part of the Journal and/or databases of the Publisher or other persons, at the discretion of the Publisher, or as an independent work around the world whether on Open-Access terms or by subscription without remuneration to the Author; Making the Article or any of its sections or parts, as well as the Article’s metadata in Russian, English or other languages, publicly available in such a way that any person can access the Article from any place, including via the Internet, and at any time of their own choosing; Granting permission/s for the use of the Article or its individual parts, as well as its metadata in Russian, English or other languages, to third parties with notice to the Author made by posting relevant information on the Journal’s website, without paying remuneration to the Author; Processing the Article, including by translating it to other languages, and by using the revised (translated) articles in the aforementioned ways. Other rights not directly transferred to the Publisher under this Agreement, including patent rights to any process, method etc., described by the Author in the Article, as well as trademark rights, are reserved for the Author. The territory where the rights to the Article are allowed to be used is the whole world. The validity of this Agreement commences from the moment the Author sends a Submission to the Journal by uploading the manuscript of an Article and supplementary materials to the online electronic system designed to accept articles for consideration, and subsequently posted in the corresponding section of the Journal’s website on the Internet. The rights are granted by the Author to the Publisher free of charge; the publication of the Article in the Journal does not entail any financial deductions to the Author. If the Publisher decides to reject the Submission or refuse to publish the Article in the Journal, this Agreement becomes invalid. The decision to refuse publication will be sent to the Author at the e-mail address specified in the Submission. The Publisher undertakes to provide the Author with the necessary services related to the publication of the Article on the Journal’s website during the term of the agreement. 4. General Provisions of Rendering the Services The Publisher will provide services to the Author only if the following conditions are met: The parties have concluded a corresponding service agreement. The Author has uploaded to the site all the materials necessary to enable the provision of services. The Author has paid for the services in full. Services are provided to the Author free of charge. If the materials are provided by the Author in violation of the guidelines and requirements of this offer, the Publisher reserves the right to reject the Submission and refuse to provide services if it has been found that the provided materials violate any of the guidelines and requirements of this offer. The Publisher will not be held responsible for the unauthorized use by third parties of the data provided by the Author during the term of the agreement. 5. Rights and Duties of the Parties The Author guarantees that: S/he holds the copyright the exclusive rights to the materials transferred as part of the manuscript of the Article. The rights granted to the Publisher under this agreement have not been previously transferred and will not be transferred to third parties in the future during the duration of the Agreement. The manuscript contains all references to the cited authors and/or publications (materials) provided for under the current copyright legislation. The Author has obtained all the necessary permissions for all information and other materials s/he holds no copyright to and that are used in the manuscript of the Article. The Article manuscript contains only materials permitted to be published in the open press and its publication and distribution will not lead to the disclosure of secret (confidential) information (including state secrets). The Author has informed co-authors about the terms of this Agreement and has received their consent to execute this Agreement under the terms provided for in the Agreement. The Author carries certain obligations under the terms of the Agreement. S/he should submit the manuscript of the Article in accordance with the Author Guidelines listed on the Journal’s website; The author should not use an electronic copy of the Article for commercial purposes and in other journal publications without the consent of the Publisher; In the process of preparing a manuscript for publication, the Author is obligated to undertake the following: Make corrections to the text of the manuscript that have been marked by the reviewers and accepted by the editorial board, and/or as necessary, upon the request of the Publisher and the editorial board, finalize the manuscript of the Article; Review and accept of reject the proofreading of the manuscript of the article under the terms stipulated by the publication schedule of the Journal; Make only the minimum of corrections to the proofreading of manuscript, which usually entails correcting and/or making factual and conjecture changes. The Author has the following rights and duties: Use preprint or prior-to publication versions of an unpublished article in the form and content accepted by the Publisher for publication in the Journal. Such prior-to-publish versions can be placed as electronic files on the personal websites of the Author (co-authors) or on the protected external websites of the employers of the Author; however, the Author cannot use the unpublished version(s) for commercial sale or for systematic external distribution by a third party (i.e. post on social media). The author or co-authors must, in turn, carry out certain duties, namely: Include the following warning in the prior-to-publish version: “This is prior-to-publish version of the article accepted for publication in (Journal’s name), ©, copyright (year), copyright owner specified in the Journal)”; Provide the corresponding electronic link to the Publisher’s website at https://vestnik-ngo.kz/ and/or via the DOI. Copy or transfer a copy of the published article in whole or in part to colleagues free of charge for their personal or professional use, for the promotion of academic or scientific research, or for informational purposes of the Author’s employer. Use materials from a published article in a book written by one of the co-authors. Use individual figures, tables and text excerpts from the Article for his or her (or co-authors’ own training purposes or to include them in other published works in printed or electronic format) by a third party, or to submit them in electronic format on an internal computer network or on the public website of the Author (co-authors) or his/her employer. Include the Article in educational collections for use in the classroom, either for free distribution to the Author’s (co-authors’) students or in electronic format on a local server for access by students as part of the training course, as well as for internal training programs at the institution of the Author’s employer. The Publisher, for its part, is obliged to: Publish the Author’s article in the Journal in printed and electronic form in accordance with the terms of this Agreement; If necessary as so decided by the Journal’s editorial board, provide the Author with the proofreading of the manuscript and make a reasonable edit of the Author’s work; Provide the Author with an electronic copy of the published Article to the Author’s e-mail address within 15 working days from the date of publication of the relevant Journal issue; Comply with the Author’s rights as provided for by the current legislation, as well as protect them and take all necessary measures to prevent copyright infringement by third parties. The Publisher has a right to: Carry out technical and literary editing of the Article manuscript without altering the main content; Conduct an expert evaluation of the manuscript and invite the Author to make the necessary changes, if any, of which until such time the article will not yet be published in the Journal; In any subsequent authorized use by the Author (and/or other persons) of the Journal and/or Article (including any separate part or fragment thereof), require that a link to the Journal, Publisher, Author or other copyright holders, the title of the Article, the Journal number, and the year of publication be specified in the Journal; Post preliminary and/or advertising information about the upcoming publication of the Article in the media and other information sources; Establish the guidelines for accepting and publishing materials in the Journal; Temporarily suspend the provision of services to the Author when technical, technological or other issues that prevent the smooth provision of such services are encountered, until such that the issues are eliminated; Make changes to the offer in accordance with the procedure established by the offer. The editorial board of the Journal, headed by the editor-in-chief, has the exclusive rights to select and/or reject materials sent to the Journal editorial office for publications purposes. The manuscript sent by the Author to the Journal editorial office is not subject to return. The editorial board of the Journal does not enter into correspondence about rejection of submissions. In all cases not stipulated and not provided for in this agreement, the parties are obliged to be guided by the relevant current laws of the Kazakh Respubic. 6. Acceptance of the Offer and Execution of the Agreement. Terms of the Agreement This Agreement comes into force from the moment of its execution, when the Author accepts the offer by submitting the manuscript to the Publisher, and is valid for the duration of the exclusive rights to the Article. Acceptance of the offer by the author creates an Agreement in writing on the terms of the offer. Transfer of the exclusive right to an Article (alienated) by the Author to a third party, does not terminate this agreement. 7. Procedure for changing and terminating the Agreement The Publisher has the right to unilaterally change the terms of this Agreement, in advance, at least 10 (ten) calendar days before the entry into force of the intended relevant changes, but with notice to the Author through the Journal’s website or by e-mail to the Author’s e-mail address specified in the Author’s Submission. The changes will take effect from the date specified in the relevant notification. If the Author rejects the changes to the terms of this Agreement, s/he has the right to notify the Publisher by sending a written notification through the online electronic system designed for accepting articles for consideration, making sure that the same is posted in the corresponding section of the Journal’s website on the Internet, or to the official e-mail address of the editorial office on the Internet. This Agreement may be terminated prematurely, either by agreement of the parties at any time, or on other grounds provided for in this Agreement. The Author has the right to unilaterally withdraw from the execution of this Agreement by sending the Publisher a corresponding notification in writing at least 60 (sixty) calendar days in advance before the expected date of publication of the Article in the Journal. Termination of the Agreement for any reason does not release the parties from liability for any violation of the terms of the Agreement that occurred during the validity period. 8. Responsibility The parties are responsible for non-fulfillment or improper fulfillment of their obligations under the Agreement. All information provided by the Author must be reliable. The Author is expected to provide accurate and complete the information to the Publisher. When using false information received from the Author, the Publisher is not responsible for the negative consequences caused by his actions on the basis of the false information provided. With regard to the content of the Article, the Author is solely responsible for compliance with the requirements of the laws of the Kazakh Respubic pertaining to advertising, copyright and related rights’ protection, protection of trademarks and service marks, and the protection of consumer rights. The Publisher does not bear any responsibility under the agreement: for any actions that are a direct or indirect result of Author’s illegal actions for any loss incurred by the Author, regardless of whether the Publisher could have foreseen the possibility of such losses or not. The Publisher is released from liability for violation of the terms of the Agreement if such violation is caused by force majeure, including actions of state authorities (including the adoption of legal acts), fire, flood, earthquake, other natural disasters, lack of electricity and/or computer network failures, strikes, civil unrest, riots, etc. 9. Dispute resolution Disputes and disagreements will be resolved by the parties through negotiations, and in case of failure to reach an Agreement they will strive to seek resolution in accordance with the current legislation of the Kazakh Respubic. If there are unresolved disagreements, the parties agree to resolve the disputes in court at the jurisdiction covered by the Publisher’s location in accordance with the current legislation of the Kazakh Respubic. 10. Miscellaneous All notifications, messages, requests, etc. (with the exception of documents that must be sent as originals in accordance with the laws of the Kazakh Respubic) are considered received by the Author if they were transmitted (sent) by the Publisher through the Journal’s website (including by publication), fax, e-mail based on the address specified in the Submission, and other communication channels. The parties recognize the legal force of notifications, messages, requests, etc., transmitted (sent) by the above methods. In the event of claims against the Publisher related to the violation of the exclusive copyright and other intellectual property rights of third parties when creating an article or in connection with the execution of this Agreement by the Author, as well as in connection with the use of the Article by the Publisher in accordance with the Agreement, the author undertakes: To immediately take measures to resolve disputes with third parties soon after receiving Publisher’s notification, and if necessary, enter into legal proceedings on the Publisher’s side and take all appropriate actions needed to exclude the Publisher from the list of defendants; To reimburse the publisher for the legal costs incurred and expenses and losses caused by the application of measures to secure the claim and execute a court decision, and the money paid to a third party for the violation of exclusive copyright and other intellectual property rights, as well as other losses incurred by the Publisher in connection with the Author’s non-compliance with the guarantees provided by them under this Agreement. 11. Legal address and details of the Publisher LLP «KMG Engineering» Address: Republic of Kazakhstan Z05H0B8, Nur-Sultan city, Esyl district, Kabanbay-batyr ave. 17 Contact (for office): +7 (7172) 559-782 Email: info@niikmg.kz WEB: https://kmgen.kz/en/company/contacts/
Stability analysis of bottom-hole drilling bits utilizing an advanced reamer-stabilizer configuration
Background: During deep drilling of oil and gas wells, the dynamic instability of the drill string caused by radial and axial vibrations of the drill bit leads to a reduction in the rate of penetration (ROP), increased tool wear, and deterioration of the wellbore gauge. This problem becomes particularly pronounced when drilling formations with alternating lithology and rock strength. An analysis of existing technical solutions, including the roller-cone reamer–stabilizer design described in the Patent of the Republic of Kazakhstan No. 22228 (E21B 10/30), has demonstratedthe need to improve the geometric and dynamic parameters of stabilizing devices intended to ensure stable dynamic equilibrium of the “bit–drill string–rock formation” system. Aim: The objective of this study is to provide theoretical and experimental justification for the causes of radial vibrations of the drilling system and to develop a near-bit roller-cone reamer–stabilizer capable of ensuring the stability of the bottom-hole assembly (BHA) at the well bottom. The stability is achieved through the efficient arrangement of the working elements at an angle of 120° and by meeting the conditions meeting the conditions for the formation of the roller cones based on their minimum size. Materials and methods: The study is based on the principles of dynamic systems theory, the laws governing energy dissipation in rotational mechanical systems, and the principle of least action. A mathematical model was developed to establish the relationship of the minimum size of the roller-cone forming elements on the nominal radius of the reamer–stabilizer. The geometric parameters of an experimental prototype of a near-bit stabilizer with a diameter of 269.9 mm, manufactured on the basis from a 203 mm heavy-weight drill pipe (HWDP), were analytically substantiated. Experimental studies were carried out under field conditions during deep drilling operations. Results: It was established that meeting the structural condition b min > 7 ⋅ R P A C 2 ensures stable dynamic equilibrium of the drilling tool relative to the wellbore axis. Field tests demonstrated a 5% increase in ROP and a 7.3% increase in bit run length. A reduction in bit balling and clogging was also observed, indicating improved hydrodynamic bottom-hole cleaning. Conclusion: The developed design of the near-bit roller-cone reamer–stabilizer validates the theoretical provisionsregarding the nature of radial vibrations in drilling dynamic systems and ensures an increase in the efficiencyof deep oil and gas well drilling. The obtained results demonstrate the feasibility of industrial implementation of the proposed technical solution and its effectiveness for application in the design of bottom-hole assembly (BHA) configurations.
Copyright (c) 2026 Abishev M.N., Zhanturin Z.K., Akhmetov N.M. https://creativecommons.org/licenses/by-nc-nd/4.0
Spacer fluids for wells drilled with invert emulsion drilling fluids: a review of their role in preventing formation damage
This article examines problems associated with the quality of cementing and casing integrity in oil and gas wells under conditions of increasing drilling activity in Kazakhstan. It is shown that complications such as behind-casing hydrocarbon migration, sustained casing pressure, and water coning are largely caused by poor cementing quality and the loss of wellbore integrity. It is noted that more than 30% of wells worldwide exhibit inter-casing pressures of varying intensity, which highlights the relevance and significance of this issue. The main causes of cement sheath degradation under the influence of mechanical, hydraulic, and thermal loads during well operation are analyzed. Particular attention is given to the problem of incomplete displacement of drilling fluids in the annular space, which leads to channel formation and a reduction in the isolation properties of the cement sheath. The role of buffer fluids in the cementing of wells drilled with hydrocarbon-based drilling fluids is also considered. The study emphasizes the need to develop effective buffer systems that ensure compatibility between drilling fluids and cement slurries, thereby improving displacement efficiency and enhancing the overall quality of well cementing and zonal isolation.
Copyright (c) 2026 Kabdushev A.A., Agzamov F.A., Issayeva D.A., Ismailov A.A. https://creativecommons.org/licenses/by-nc-nd/4.0
Analysis of the effectiveness of surfactant application in enhanced oil recovery methods
Background: Conventional waterflooding typically achieves an oil recovery factor of no more than 35–40%, leaving a significant portion of the oil in place within the pore space of the reservoir rock, where it is retained by capillary forces. The application of chemical enhanced oil recovery methods, particularly Alkaline–Surfactant–Polymer (ASP) flooding, is a promising approach for high-viscosity oil reservoirs, where conventional waterflooding is characterized by a highly unfavorable mobility ratio between the displacing fluid and the oil. Aim: Systematic laboratory evaluation of ASP flooding effectiveness for the productive horizons of Field X (Western Kazakhstan),, based on real core samples from borehole K-2524, with the development development of recommendations for optimising the chemical slug formulation. Materials and Methods: The study employed methods such as incoming quality control of commercial surfactant samples, compatibility testing at a specified reservoir temperature over a defined period, phase behaviour screening of lauryl sulfate / sodium hydroxide systems with crude oil from two horizons, and filtration experiments conducted using the PLS-200 petrophysical laboratory setup. Results: ASP flooding with 0.02% sodium dodecyl sulfate (SDS) + 0.6–0.8% NaOH + 2,500–3,000 ppm hydrolyzed polyacrylamide (HPAM) achieved an incremental oil recovery factor of 19.0–19.2% for the Cretaceous chalk horizon (total RF of 68.5–68.9%) and 17.7% for the Jurassic horizon at 3,000 ppm HPAM. The HPAM concentration is a critical design parameter: deviation from the required mobility ratio condition (M ≤ 1.0) reduces the incremental oil recovery by nearly half. Conclusion: ASP flooding demonstrated high efficiency for both horizons when the formulation parameters were properly optimized. The optimal formulation (0.02% SDS + 0.8% NaOH + 2,500 ppm HPAM) is recommended as providing the best balance between incremental oil recovery factor and reagent cost.
Copyright (c) 2026 Rakhmet B.G. https://creativecommons.org/licenses/by-nc-nd/4.0
Practical implementation of an integrated corrosion monitoring system at the fields of the South Torgay Turgay Oil and Gas fields three independent measurement methods
Background: The problem of internal corrosion in oil and gas pipelines remains one of the key challenges in ensuring industrial safety and reliable operation. Conventional monitoring methods, such as gravimetric and electrochemical techniques, provide only average corrosion rates and do not account for localized areas of accelerated metal loss or the influence of erosion. Therefore, the implementation of integrated corrosion monitoring systems combining several independent measurement techniques is an important and timely direction. Aim: The aim of this study is to evaluatethe “Corrosion Monitoring System” technology under field conditions in the South Turgay Oil and Gas Basinemploying three complementary methods simultaneously – Electrical Resistance (ER), Ultrasonic Thickness Measurement (UT), and Gravimetric Control (Coupon Testing). Materials and methods: The trials were conducted on the collectors of the Oil Processing and Pumping Shop (OPPS) “A” and the Oil Treatment Plant (OTP) “B”), operating under gas-liquid multiphase flow conditions with abrasive inclusions. Monitoring was carried out using stationary electrical resistance (ER) and ultrasonic thickness (UT) systems, as well as witness coupons. Signal acquisitionwas based on changes in the physical parameters of the sensors (electrical resistance, ultrasonic wave travel time, or mass loss), allowing real-time assessment of metal loss dynamics. Results: Corrosion rates were greater than0.5 mm/year at CPPN “A” and reached 0.2 mm/year at UPN “B”. The agreement between ER and coupon testing reached8.73% and 0.68%, respectively, which falls within the reproducibility range (≤10%). Ultrasonic analysis revealed non-uniform wear across the pipe cross-section: the highest metal loss occurred in the lower section (“6 o’clock” position), where water and solid particles accumulated, while the side sections exhibited lower corrosion rates. This confirmed the sensitivity of the UT method to localized erosion–corrosion zones sensitive to localized areas not captured by averaged methods. Conclusion: The combined use of three methods enables a comprehensive assessment of pipeline integrity – from overall corrosion rates to identification of local erosion–corrosion areas. The practical significance of this work lies in the potential to optimize inhibitor dosages, reduce the risk of pipeline failures, and improve operational reliability.
Copyright (c) 2026 Kalymova P.A., Turmaganbet S.Y., Chechina Y.V., Baimenov S.Y., Berdyev A.Z., Jaxylykov T.S., Mardanov A.S. https://creativecommons.org/licenses/by-nc-nd/4.0
Using Big Data and analytics for forecasting and productivity enhancement in the oil and gas industry
Amid the digital transformation of the global economy, Big Data analytics and advanced analytics technologies are becoming key tools for enhancing business efficiency and sustainability. Their application is particularly relevant in the capital-intensive and high-risk oil and gas industry, where data-driven decision-making offers significant competitive advantages. This study examines the opportunities and benefits of implementing Big Data and analytical solutions across various stages of the oil and gas production cycle – from geological exploration and drilling to processing and transportation. The study presents the main data sources and types characteristic of the industry, as well as modern analytical methods, including descriptive, predictive, prescriptive, and real-time analytics. Special attention is given to machine learning and artificial intelligence algorithms used for predicting equipment failures, optimizing drilling parameters, and modeling reservoir behavior. Based on the analysis of case studies from leading international companies such as BP, Equinor, Gazprom Neft, and others, it is shown how digital tools can improve decision-making accuracy, reduce operational costs, and minimize technological risks. The study also examines the key challenges hindering the widespread adoption of Big Data in the sector, including a shortage of qualified personnel, integration difficulties between legacy and modern systems, cybersecurity concerns, and the high cost of digital transformation. The analysis leads to the conclusion that data and analytics constitute strategic assets for the future development of the oil and gas industry. Digital technologies open up new horizons in forecasting, management, and sustainable production, paving the way for next-generation intelligent oil and gas enterprises.
Copyright (c) 2026 Seitimbetova A.B., Shulgina-Tarashchuk A.S., Smailova A.S. https://creativecommons.org/licenses/by-nc-nd/4.0
Application of artificial intelligence in the oil and gas industry: trend or necessity?
Background: In recent decades, artificial intelligence technologies (hereinafter – AI) have been rapidly integrated into the oil and gas industry, covering key stages of geological exploration, geophysical data interpretation, reservoir modeling, and field development. Modern methods of big data analysis, machine learning, and intelligent control systems make it possible to improve the accuracy of interpreting geological, geophysical, and well logging data, reduce uncertainty in engineering decision-making, minimize operational risks, and optimize hydrocarbon exploration and production processes. Aim: This article examines contemporary areas of AI application in the oil and gas industry, with a particular focus on the tasks of automated interpretation of well logging data (hereinafter – WL), classification of lithological rock composition, reconstruction of logging curves, and digitalization of geological exploration processes. An analysis of global experience in implementing AI technologies in the field of well logging, processing and interpretation of geological and geophysical information is conducted, and integrated software solutions and digital platforms of leading international oilfield service and oil and gas companies are also reviewed. Materials and Methods: Particular attention is given to the practical experience of applying machine learning methods at KMG Engineering LLP for automated lithology classification based on well logging data. Within the framework of the study, various machine learning algorithms, including Logistic Regression, Random Forest, XGBoost, and other machine learning algorithms, were tested using data from more than 100 wells. The study also considers the specifics of data preparation and cleaning, the formation of training and test datasets, as well as issues related to incompleteness, heterogeneity, and the low quality of historical geological and geophysical data. Results: The results of the study demonstrated that the application of ensemble methods and gradient boosting algorithms makes it possible to achieve high accuracy in lithological type classification and effectively automate the interpretation of well logging data. The best results were obtained using the Random Forest algorithm, which demonstrated high robustness and predictive performance under real production data conditions. Particular attention is also given to the integration of trained models into corporate information systems for operational lithology prediction and support of geological and technical decision-making. Conclusion: It is concluded that the implementation of artificial intelligence technologies represents one of the key directions of digital transformation in the oil and gas industry of Kazakhstan. The use of AI makes it possible to improve the efficiency of geological exploration activities, accelerate data processing and interpretation, increase hydrocarbon recovery factors, and reduce field development costs under conditions of increasing geological complexity and declining resource base quality.
Copyright (c) 2026 Ayaganova A.I., Kurmangaliyev D.Z., Abilgaziyeva A.S., Dukessova N.K. https://creativecommons.org/licenses/by-nc-nd/4.0
Comprehensive interpretation of geochemical, physicochemical studies and PVT parameters for verification of phase zonation of reservoirs (a case study of the Eastern Urikhtau field)
Background: Correct identification of the fluid phase state (oil or gas condensate) at the Eastern Urikhtau field is critically important for reliable reserve estimation and the selection of an appropriate development strategy. Anomalously highgas-oil ratio values in wells EU-6 and EU-7 (up to 1000 m³/m³) as well asdiscrepancies between the hypsometric levels of the presumed gas-oil contact and regional data, create uncertainty that requires resolution using an integrated approach. Aim: To determine the genetic origin and phase state of reservoir hydrocarbon systems at the Eastern Urikhtau field based on data from seven wells using a multidisciplinary approach. Materials and methods: The study was based on seven bottomhole fluid samples collected from wells EU-1–EU-4 and EU-6–EU-8. The analytical program included gas chromatography (GC), gas chromatography–mass spectrometry (GC-MS), fingerprinting, biomarker analysis (steranes, terpanes, aromatic hydrocarbons), as well as physicochemical and PVT analyses using the FLUID EVAL™system with visual phase-statemonitoring. Results: Biomarker analysis confirmed the genetic uniformity of all samples. indicating that the fluids were generated within a single marine carbonate petroleum system. Based on a set of criteria (density >780 kg/m³, molecular weight >150 g/mol, C₇₊ content >85%, Σ(C₁–C₉)/Σ(C₁₀₊) ratio <1), all samples were classified as oil. The sample from well EU-7 was identified as volatile oil. PVT analyses and visual observations ruled out the presence of gas-condensate systems. The established phase model corresponds to an oil reservoir characterized by gravitational segregation and a volatile-oil transition zone in the crestal part of the structure, without a conventional gas cap. Conclusion: The multidisciplinary approach applied in this study enabled verification of the fluid phase zonation at the Eastern Urikhtau field. The proposed reservoir model, representing an oil rim without a distinct gas cap, requires the application of the volumetric method for reserve estimation and consideration of the identified phase heterogeneity during field development planning in order to minimize geological risks and ensure accurate resource assessment.
Copyright (c) 2026 Seitkhaziyev Y.S., Jarassova T.S., Aldebek A.Y., Ykhlassov N.K., Rakhymberdi R. https://creativecommons.org/licenses/by-nc-nd/4.0
Development of a laboratory methodology for core flooding experiments to evaluate gravity segregation in oil–water saturated porous media
Background: High water cut increases operating costs and reduces oil recovery. Gravity-driven redistribution of oil and water during well shut-in periods has been proposed for reducing water cut; however, laboratory methodologies for investigating this phenomenon in core samples remain limited. Aim: To develop a laboratory methodology for evaluating gravity segregation in oil–water saturated cores under controlled conditions. Materials and methods: The methodology is based on epoxy-sealed cores fixed inside a sleeve, providing a practical and cost-effective core holder capable of accommodating pressure ports. Two experimental scenarios are considered: early water breakthrough caused by an unfavorable mobility ratio, and breakthrough induced by a high-permeability channel. After water breakthrough, flooding is suspended, the core is aged in a vertical position, and water injection is subsequently resumed. Effluent analysis is performed using a gravimetric oil–water separation technique based on the adhesion of oil to polyethylene. The methodology enables qualitative and quantitative assessment of fluid redistribution caused by gravity. Results: Fractional flow analysis demonstrates that, when viscous oils are used, a significant fraction of mobile oil remains in the core after water breakthrough, whereas artificial high-permeability channels can be used to preserve low-viscosity mobile oil within the matrix for subsequent redistribution by gravity segregation. Conclusion: The developed methodology provides a reliable and inexpensive platform for investigating gravity segregation in cores and may support the development of field technologies aimed at reducing water cut and improving oil recovery.
Copyright (c) 2026 Sagyndikov M., Gussenov I., Melis Y., Matkir Z. https://creativecommons.org/licenses/by-nc-nd/4.0
Analysis of the influence of process parameters on the formation of liquid products during the pyrolysis of polystyrene waste
This study examines the thermal treatment of polystyrene waste as an effective alternative to conventional mechanical recycling. Given the growing volume of plastic waste and the complexity of processing foamed materials, an analysis was conducted of recent publications on the influence of process parameters on the yield and composition of liquid pyrolysis products. Particular attention was paid to the effects of temperature and residence time in the reaction zone. Based on the analysis, it was established that the most optimal temperature range is 400–500°C. It is under these conditions that the maximum yield of the liquid fraction, enriched with valuable aromatic compounds, including styrene, benzene, toluene, and ethylbenzene is achieved. As a result, it was found that deviations from the optimal temperatures lead either to incomplete polymer degradation or to excessive gas formation. The advantages of pyrolysis in the processing of contaminated and expanded polystyrene materials were highlighted. Additionally, the importance of improving the efficiency of polymer waste processing technologies in the context of increasing environmental pressure is emphasized. It is concluded that the technology has significant potentialfor the production of chemical feedstocks and the development of a circular economy, provided that systems for sorting, purifying, and subsequent fractionation of pyrolysis products are improved.
Copyright (c) 2026 Kizatov Y.M., Dyussova R.M., Kopishev E.Y., Kaliyev O.Y. https://creativecommons.org/licenses/by-nc-nd/4.0
Catalytic isomerization of light alkanes: thermodynamic, kinetic, and technological aspects
The gradual tightening of environmental standards, combined with growing global demand for environmentally friendly fuels, has significantly increased the importance of advanced technologies in oil refining. In this context, the catalytic isomerization of light alkanes (C₄–C₆ fraction) is one of the most strategic processes for improving gasoline quality without increasing the concentration of aromatic hydrocarbons or adding hazardous additives. From a chemical standpoint, this process promotes the structural rearrangement of linear paraffins into corresponding branched isomers, which possess a higher octane numbers. This results in a significant improvement in the fuel’s combustion characteristics, while reducing the formation of environmentally harmful emissions. This review systematically examines the fundamental principles underlying the isomerization of alkanes. Particular attention is given to the reaction mechanism, which proceeds via carbocationic intermediates at acidic catalytic sites, reflecting the well-established mechanism of acid-catalyzed hydrocarbon transformations. Furthermore, the thermodynamic constraints governing the equilibrium distribution of isomers, as well as the kinetic factors influencingreaction rate, product selectivity, and overall process efficiency, are critically analyzed. Special emphasis is placed on bifunctional catalytic systems combining metal and acid functions, enabling the simultaneous hydrogenation–dehydrogenation and skeletal isomerization steps. The role of competing side reactions, notably hydrocracking and aromatization, is also addressed due to their influence on product yield and catalyst stability. Beyond theoretical considerations, this review examines the complexities inherent in real industrial systems. In practice, the attainment of thermodynamic equilibrium is often limited by kinetic constraints, resistance to mass transfer within particles and between phases, as well as by the gradual deactivation of the catalyst due to coke formation or poisoning. These factors require a more detailed understanding of process behavior under industrial operating condition.
Copyright (c) 2026 Orazbayev N.S., Seitenova G.Z. https://creativecommons.org/licenses/by-nc-nd/4.0
Thermal destruction of composite raw materials based on combustible shale and heavy petroleum products
Background: The significance of this study stems from the necessity to broaden the hydrocarbon resource base as conventional oil reserves are steadily declining. Consequently, alternative sources like oil shale, which boast global reserves far exceeding those of traditional oil, have become a focal point of interest. Furthermore, incorporating fuel oil into composite feedstock’s addresses the challenge of efficiently processing heavy oil residues, converting them into high-value motor fuel components. Aim: Determining the effect of composite feedstock composition (shale/fuel oil) on thermal degradation parameters and investigating the physicochemical properties of the resulting products for their further application as motor fuel components. Materials and Methods: The study objects included oil shale from the Kenderlyk deposit (East Kazakhstan Region, JSC “Quartz”) and petroleum fuel oil from the Pavlodar refinery (Northeastern Kazakhstan). The hydrogenation process was studied using two types of equipment: in a rotating 2-liter autoclave and on a bench-scale flow-through unit (reactor volume 0.8 L). For the disposal of sludge (solid liquefaction residue), the pyrolysis method was used in a flow-through apparatus with a descending layer of solid heat carrier. Results: Analysis of experimental data showed that increasing the hydrogenation temperature of oil shale from 410 to 440°C (at P = 8 MPa) intensifies gas formation from 10.2 to 12.2 wt.% and almost doubles hydrogen consumption to 1.6 wt.%, contributing to an increase in the yield of gasoline and diesel fractions. It was found that increasing the hydrogen pressure within the range of 4.0–8.0 MPa has a positive effect on the performance: the organic mass of shale (OMS) increases by 20%, while the yields of liquid products, gas, and water rise to 50.4, 10.5, and 7.7 wt.%, respectively. A further increase in pressure beyond 8.0 MPa is impractical, as it does not significantly affect the process. Optimization of the parameters of thermocatalytic processing of a mixture of fuel oil and shale made it possible to identify the best conditions: temperature 420°C, time 60 min, and concentration of shale as an activating additive 12 wt.%. In this mode, the total distillate yield reaches 59.2% by mass. Conclusion: The fundamental feasibility and high efficiency of the co-processing of oil shale and heavy petroleum residues have been proven. The resulting liquid degradation products possess optimal physicochemical properties for the subsequent compounded processing of solid fossil fuels. They serve as a direct alternative to the scarce components of highly marketable motor fuels.
Copyright (c) 2026 Kairbekov Z.K., Sarmurzina R.G., Esenalieva M.Z., Kairbekov A.A., Suimbaeva S.M., Dzheldybaeva I.M. https://creativecommons.org/licenses/by-nc-nd/4.0
Having committed in 2023 to reducing methane emissions by 30% by 2030, Kazakhstan plans to update its legislation on this greenhouse gas, focusing on improving its emission monitoring, reporting, and verification systems for emissions, using the example of subsidiaries and affiliates of NC KazMunayGas JSC. In the context of sustainable development and climate change mitigation, accurate measurement and transparent reporting of methane emissions are becoming key elements of effective environmental policy. The article provides an overview of approaches to calculating methane emissions based on the national methodology and in accordance with the requirements of OGMP 2.0, organized by UNEP. The implementation of this article is necessary not only to meet national and corporate commitments, as exemplified by NC KazMunayGas JSC , but also in connection with the entry into force of the new European Union regulation on methane emission reduction. The data on methane emissions for the KMG group of companies for 2023 and 2024 are presented, calculated using the national methodology and OGMP 2.0. The measures required to fulfill international commitments and improve the accuracy of methane emissions accounting in the oil and gas industry are outlined. Key areas for improving national regulation of methane emissions in the oil and gas industry have been identified.
Copyright (c) 2026 Shalabekova A.L., Idrissova E.K., Atemova G.T. https://creativecommons.org/licenses/by-nc-nd/4.0