Kazakhstan journal for oil & gas industry

Background: Well tying is an integral part of seismic interpretation both at the stage of structural and dynamic analysis. Linking seismic and well data is a critical process that allows you to link geological objects identified from seismic data with actual data obtained from wells, because. it is based on the relationship between the lithological composition of the deposits that make up the section under study and the characteristics of the reflections. Seismic data are in most cases presented on a time scale, while well data are on a depth scale, and in order to calibrate them, it is necessary to select a velocity law and establish a time-depth relationship.

Aim: This article aims to deepen the understanding of the importance of quality control of initial well data to improve the result of seismic stratigraphic tying and increase the efficiency of geological exploration, as well as to propose methods to improve the quality and efficiency of tying..

Materials and methods: Methods for correcting the readings of acoustic logging are described, various algorithms for tying seismic and well data are given.

Results: The paper considers the reasons for the distortion of the values of the initial well data, examples of data quality analysis, suggests options for how to conduct a seismic stratigraphic tie in the conditions of a limited or initially substandard set of initial data and obtain reliable depth-velocity dependences for wells.

Conclusion: Conducting quality control and, if necessary, correcting the original well data is a critical step to improve the accuracy of the final results of seismic interpretation. It is important to note that even with limited and low quality input data, it is possible to obtain depth-time dependencies. However, the results of the work show that editing and amending the original logs significantly improve the quality and detail of the seismic stratigraphic tie.

Background: A significant proportion of the remaining oil reserves of the fields under development is confined to reservoir zones with low-permeability and undersaturated reservoir, thin reservoirs. Maintenance of oil production levels in such deposits is possible through methodological study and development of recommendations for optimizing and improving the development system, targeted application of technologies and methods for enhanced oil recovery. In turn, the methodological study for deposits with hard-to-recover reserves includes a systematic statistical and geological and technological analysis of the results of field development, an analysis of existing generally accepted methodologies, and theoretical studies. Thus, the creation of an integrated approach to regulating the development of oil fields, taking into account a detailed understanding of the geological structure, is an important task in the current state of the fields under development.

Aim: The aim of the work is to develop an integrated approach to regulating the development of oil fields with hard-to-recover reserves based on methodological solutions of technological and statistical analysis, differentiation of research objects, retrospective analysis of the use of technologies and methods aimed at increasing oil recovery. The aim of the work is to form an integrated approach to regulating the development of oil fields with hard-to-recover reserves based on methodological solutions for geological-technological and geological-statistical analysis, differentiation of research objects, retrospective analysis of the use of technologies and methods aimed at increasing oil recovery.

Materials and methods: Achieving this goal is possible using the following methods: statistical analysis, geological and field analysis, methodological solutions for studying the relationship "rock – fluid", differentiation of research objects according to geological, geophysical and geological and field data. On the example of some stages, research algorithms are proposed.

Results: A methodological solution is proposed for regulating the development of oil fields with hard-to-recover oil reserves.

Conclusion: The proposed geotechnological approach to the development control will improve the technological efficiency of hydrocarbon reserves development due to a detailed understanding of the reservoir structure, differentiation into zones (areas) of the reservoir, study and analysis of their state of development, reasonable selection of priority and promising technologies and technical solutions to increase their production.

Nowadays, many literature sources exist, containing the applicability criteria for enhanced oil recovery methods (hereinafter - EOR). The criteria were developed by the world experts, specialized oil and gas companies, determined in the laboratory and confirmed by field experience. In a number of cases, the authors compile databases with the fields, where different EOR technologies were used, evaluate their effectiveness, the complexity of the application, and the peculiarities of the implementation of the EOR technologies for certain geological and physical conditions of the fields. Based on the results of such analytical work, it is possible to determine the optimal ranges for the application of certain EOR technologies, and recommend their use in screening in order to further evaluate potentially suitable technologies under the laboratory and field conditions.

This paper presents the uniform criteria for the applicability of the key technologies of chemical, thermal, gas and microbiological EOR. To unify these criteria, an extensive literature review, a retrospective analysis of the previously tested EOR technologies, an analysis of the geological, physical and technological conditions for the use of the EOR technologies have been carried out. In order to compare the geological and physical parameters of the reservoirs and the technological parameters of the fields with certain unified applicability criteria, a screening tool has been developed, which takes into account all the necessary criteria for identifying the priority EOR technologies.

Background: One of the conditions for the effective development of oil and gas fields is reliable forecasting of its exploitation, including using the capabilities of modern software. As a result of many years of work, the first and only Kazakhstani import-substituting software product "Zhuldyz" was developed which helps to control the implementation of process solutions at the field.

Aim: Implement a single software platform covering the complete cycle of exploration and development of the fields.

Materials and methods: This paper presents the experience of using the “Zhuldyz” software at the Karatobe Yuzhnoye field, as well as software modules for optimizing modeling processes.

Results: Using software accounting a set of geological and physical results and the production history of the Karatobe Yuzhnoye deposit, data were obtained for constructing development maps, assessing reservoir connectivity and distribution of injected water, analyzing field performance for wells, selecting candidate wells for well interventions, as well as software modules for optimizing modeling processes. Additional opportunities for assessing and comparing field development indicators have also been identified.

Conclusion: Based on the results of the analysis carried out in the Zhuldyz software, solutions were developed to improve the reservoir pressure maintenance system at the Karatobe Yuzhnoye deposit. The selection of wells for well interventions and the calculation of efficiency were carried out, which will reduce the number of unsuccessful well interventions by increasing the quality of selected candidate wells through a new appraisal approach from a geological and technological point of view.

Sulfur is found at the land's surface, in quarries, and as a natural sulfur resource. However, most of the part sulfur is obtained during the sulfur removal processes from crude oil or gas. These recovery processes are essential for the global energy resource market. Approaches to sulfur mining and recovering techniques are discussed and compared during the literature review and description analysis. Methods that are majorly used in the industry, their process flow diagrams, and principal of work are explained and compared relative to the modern methods of sulfur removal processes.

The prospects for using new-generation energy-accumulating substances based on aluminum alloys activated with activating metals (indium, gallium, tin, eutectics of low-melting metals) as non-traditional environmentally friendly sources for hydrogen production from water and energy accumulation methods, the formation of various forms of aluminum hydroxides, are discussed, which can be used in solving environmental problems in the oil industry: in technologies for complex oil treatment, destruction of abnormally stable water-oil emulsions and oil sludge, demetallization and desulphurization of hydrocarbon raw materials, for the treatment of industrial waste, recycled and natural waters, as well as the reclamation of oil-contaminated areas with low and average levels of pollution, restoration of their fertility when used together with organomineral (humic) fertilizers.