Kazakhstan journal for oil & gas industry
type: channel
description: 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)
publisher: KMG Engineering
language: ru-RU
publication name: Kazakhstan journal for oil & gas industry
issn: 2707-4226
copyright: 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 pub…
items: Stability analysis of bottom-hole drilling bits utilizing an advanced reamer-stabilizer configuration
items: Spacer fluids for wells drilled with invert emulsion drilling fluids: a review of their role in preventing formation damage
items: Analysis of the effectiveness of surfactant application in enhanced oil recovery methods
items: Practical implementation of an integrated corrosion monitoring system at the fields of the South Torgay Turgay Oil and Gas fields three independent measurement methods
items: Using Big Data and analytics for forecasting and productivity enhancement in the oil and gas industry
items: Application of artificial intelligence in the oil and gas industry: trend or necessity?
items: Comprehensive interpretation of geochemical, physicochemical studies and PVT parameters for verification of phase zonation of reservoirs (a case study of the Eastern Urikhtau field)
items: Development of a laboratory methodology for core flooding experiments to evaluate gravity segregation in oil–water saturated porous media
items: Analysis of the influence of process parameters on the formation of liquid products during the pyrolysis of polystyrene waste
items: Catalytic isomerization of light alkanes: thermodynamic, kinetic, and technological aspects
items: Thermal destruction of composite raw materials based on combustible shale and heavy petroleum products
items: Methane regulation: emissions reporting

Stability analysis of bottom-hole drilling bits utilizing an advanced reamer-stabilizer configuration
type: item
description: 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 condi…
creator: Murat N. Abishev
creator: Zhomart K. Zhanturin
creator: Nurken M. Akhmetov
rights: Copyright (c) 2026 Abishev M.N., Zhanturin Z.K., Akhmetov N.M. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 8
ending page: 15
doi: 10.54859/kjogi108959

Spacer fluids for wells drilled with invert emulsion drilling fluids: a review of their role in preventing formation damage
type: item
description: 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.
creator: Arman A. Kabdushev
creator: Farit A. Agzamov
creator: Dina A. Issayeva
creator: Abdulakhat A. Ismailov
rights: Copyright (c) 2026 Kabdushev A.A., Agzamov F.A., Issayeva D.A., Ismailov A.A. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 16
ending page: 26
doi: 10.54859/kjogi108962

Analysis of the effectiveness of surfactant application in enhanced oil recovery methods
type: item
description: 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.
creator: Birzhan G. Rakhmet
rights: Copyright (c) 2026 Rakhmet B.G. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 27
ending page: 35
doi: 10.54859/kjogi108999

Practical implementation of an integrated corrosion monitoring system at the fields of the South Torgay Turgay Oil and Gas fields three independent measurement methods
type: item
description: 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 z…
creator: Perizat A. Kalymova
creator: Sagat Ye. Turmaganbet
creator: Yuliya V. Chechina
creator: Sanzhar Ye. Baimenov
creator: Arslanbek Zh. Berdyev
creator: Talgat S. Jaxylykov
creator: Altynbek S. Mardanov
rights: 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
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 36
ending page: 47
doi: 10.54859/kjogi108935

Using Big Data and analytics for forecasting and productivity enhancement in the oil and gas industry
type: item
description: 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.
creator: Aigerim B. Seitimbetova
creator: Alevtina S. Shulgina-Tarashchuk
creator: Aizhan S. Smailova
rights: Copyright (c) 2026 Seitimbetova A.B., Shulgina-Tarashchuk A.S., Smailova A.S. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 48
ending page: 58
doi: 10.54859/kjogi108887

Application of artificial intelligence in the oil and gas industry: trend or necessity?
type: item
description: 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 applicatio…
creator: Anar I. Ayaganova
creator: Darkhan Zh. Kurmangaliyev
creator: Aliya Sh. Abilgaziyeva
creator: Nadezhda K. Dukessova
rights: Copyright (c) 2026 Ayaganova A.I., Kurmangaliyev D.Z., Abilgaziyeva A.S., Dukessova N.K. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 59
ending page: 73
doi: 10.54859/kjogi108909

Comprehensive interpretation of geochemical, physicochemical studies and PVT parameters for verification of phase zonation of reservoirs (a case study of the Eastern Urikhtau field)
type: item
description: 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…
creator: Yessimkhan S. Seitkhaziyev
creator: Tolganay S. Jarassova
creator: Almira Ye. Aldebek
creator: Nauryzbay K. Ykhlassov
creator: Rauan Rakhymberdi
rights: 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
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 74
ending page: 92
doi: 10.54859/kjogi108969

Development of a laboratory methodology for core flooding experiments to evaluate gravity segregation in oil–water saturated porous media
type: item
description: 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.
creator: Marat Sagyndikov
creator: Iskander Gussenov
creator: Yerzhan Melis
creator: Zhanabay Matkir
rights: Copyright (c) 2026 Sagyndikov M., Gussenov I., Melis Y., Matkir Z. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 94
ending page: 104
doi: 10.54859/kjogi108985

Analysis of the influence of process parameters on the formation of liquid products during the pyrolysis of polystyrene waste
type: item
description: 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.
creator: Yessmagambet M. Kizatov
creator: Rizagul M. Dyussova
creator: Eldar Ye. Kopishev
creator: Olzhas Ye. Kaliyev
rights: Copyright (c) 2026 Kizatov Y.M., Dyussova R.M., Kopishev E.Y., Kaliyev O.Y. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 105
ending page: 118
doi: 10.54859/kjogi108982

Catalytic isomerization of light alkanes: thermodynamic, kinetic, and technological aspects
type: item
description: 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 cata…
creator: Nurkhan S. Orazbayev
creator: Gaini Zh. Seitenova
rights: Copyright (c) 2026 Orazbayev N.S., Seitenova G.Z. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 119
ending page: 132
doi: 10.54859/kjogi108984

Thermal destruction of composite raw materials based on combustible shale and heavy petroleum products
type: item
description: 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…
creator: Zhaksyntay K. Kairbekov
creator: Raushan G. Sarmurzina
creator: Manshuk Z. Esenalieva
creator: Alizhan A. Kairbekov
creator: Saltanat M. Suimbaeva
creator: Indira M. Dzheldybaeva
rights: 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
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 133
ending page: 141
doi: 10.54859/kjogi108955

Methane regulation: emissions reporting
type: item
description: 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.
creator: Aliya L. Shalabekova
creator: Elmira K. Idrissova
creator: Gulshira T. Atemova
rights: Copyright (c) 2026 Shalabekova A.L., Idrissova E.K., Atemova G.T. https://creativecommons.org/licenses/by-nc-nd/4.0
license: https://creativecommons.org/licenses/by-nc-nd/4.0
date: 2026-06-30
publication date: 2026-06-30
volume: 8
number: 2
starting page: 142
ending page: 151
doi: 10.54859/kjogi108915