To improve the accuracy of lithotype classification and reduce uncertainty in hydrocarbon prospecting predictions under conditions of weak contrast in the elastic properties of reservoirs and the surrounding rock by testing a probabilistic approach to seismic data interpretation. Methodology. The study applies a technological approach that includes: 1. Constructing probability distribution functions for lithotypes based on lithological trend data from wells. 2. Using inversion to create cubes of elastic properties and their further analysis using Bayes’ principle. 3. Lithotype classification based on the probabilistic approach by aligning inversion data with probability distributions. Findings. High-resolution seismic data processing was carried out successfully, which ensured their high resolution. Elastic property volumes were obtained and used to assess the probability of various lithotypes. The Bayesian approach to lithotype classification was implemented, demonstrating improved interpretation accuracy in conditions of low elastic property contrast. Promising structures were identified, confirming the effectiveness of the proposed approach in complex geological settings. Originality. A probabilistic method for seismic data analysis was tested, based on the integration of probability distribution functions and inversion data. This methodology allows for accounting for lithological variability and uncertainties during interpretation, representing a novel approach for conditions of low elastic property contrast. Practical value. The developed methodology can be applied in hydrocarbon exploration and field development when reservoir and host rock physical properties exhibit weak contrast. It helps reduce geological risks, optimize drilling site selection, and enhance the economic efficiency of geological exploration

Asphalt-resin-paraffin deposits (ARPD) are a complex dispersed system formed by substances that have separated from the oil phase according to various signs. The sediments include asphaltenes, resins, paraffins, liquid hydrocarbons, mechanical impurities and water. In conditions of intensive deposition of ARPD, normal operation of wells is impossible without carrying out work using dewaxing equipment. The purpose of the treatment is the use of chemical reagents in the composition of the emulsion to affect the bottom-hole zone of the well formation and to remove ASF from underground equipment (UE). The objects of application of this technology are producing wells with decreasing current productivity due to the loss of ARPD. The applied technology should ensure the removal of deposits from the bottom-hole zone (BHZ) of the formation and thereby increase the productivity of the well. The article describes the development and testing of a nitrite composition to increase well productivity. The substantiation of scientific, technical and economic necessity for developing a composition that provides not only a high degree of washing of pore channels, but also a sufficiently high temperature of the process due to the use of the most economical method, i.e. exothermic reaction, is proposed. The paper develops a technology for using emulsions. The results of treating the bottomhole zone of production wells at the Uzen field with an emulsion based on natural gasoline and ammonium nitrite are presented. © 2025 International Multidisciplinary Scientific Geoconference. All rights reserved.

В статье рассматривается определение границ зон обрушения вышележащих пород над отработанными панелями рудника Жомарт с использованием сейсмических данных. Исследование основано на применении современных методов 2D-сейсморазведки, обработки и интерпретации волнового поля для выявления нарушенных зон, смещений пород и неоднородностей геологической среды в пределах Жаман-Айбатского месторождения медистых песчаников Центрального Казахстана.

В статье рассматривается влияние физико-химических характеристик урановых руд на эффективность подземного скважинного выщелачивания месторождений урана в Казахстане. Проанализированы геологические условия, минералогический состав, литологические особенности и состав руд из Сырдарьинской и Шу-Сарысуйской депрессий. Исследование включает анализ керна, рентгенофазовый анализ, микроскопическое изучение образцов и оценку факторов, влияющих на процессы выщелачивания урана.

В статье представлен информационный анализ геолого-генетической систематизации известных проявлений порфирово-медной минерализации на территории Восточного Казахстана. Рассмотрены структурно-формационные зоны Рудный Алтай, Жарма-Саур, Шингиз-Тарбагатай и Джунгаро-Балхаш. Проведен анализ архивных, фондовых и литературных данных, а также геологических, геофизических и геохимических материалов для уточнения критериев прогнозирования и оценки перспективных объектов медной минерализации.

The rational use of natural resources is an urgent task not only in the oil and gas sector, but also in all sectors of production. This paper presents procedures for the preparation and purification of extracted oil-containing wastewater and stormwater from suspended solids, as well as various salts dissolved in water with the supply of coagulant solutions: iron sulfate or aluminum sulfate and soda ash to adjust the pH value. The conducted research and measures for the treatment of stormwater and carbonaceous wastewater at the Amangeldy gas condensate field have shown positive results. The purified water can be used for various purposes and the paper suggests using it for own needs of the field, for example, for watering and irrigation of green areas and the surplus can be used for growing melons, etc. The proposed purification technology consists in the use of aluminum sulfate and soda ash to increase the efficiency of purification of oil-containing wastewater and stormwater, as well as the use of purified water for own needs of the field, which will lead to savings and rational use of natural resources. © 2025 International Multidisciplinary Scientific Geoconference. All rights reserved.

В статье представлены результаты детальной высокоразрешающей 3D-сейсморазведки, выполненной для прогнозирования и изучения сложных рудных объектов Жезказганского рудного района Центрального Казахстана. Рассмотрены возможности современных методов обработки и интерпретации сейсмических данных для выявления подземных рудных объектов, связанных с медистыми песчаниками, уточнения геологической модели, выделения стратиграфических горизонтов, разломов и зон минерализации.

В статье рассматриваются литологические и стратиграфические типы залежей нефти и газа Южного Мангышлака. Основное внимание уделено формированию ловушек в юрских и триасовых отложениях, перспективным песчаным горизонтам флювиальных и дельтовых фаций, а также уточнению прогноза нефтегазоносных зон на основе литологического анализа, палеогеографических реконструкций, 3D-сейсморазведки и современных методов бурения.

Providing a reliable water supply to rural areas of the Mangystau Peninsula requires the construction of large-diameter wells, often in challenging geological conditions. However, the achievable drilling depth is limited by various factors related to hydraulics and the mechanical configuration of the drilling system. This study investigates how key geological and technological parameters influence the maximum depth of large-diameter wells when reverse-circulation drilling is used. A theoretical model was developed to simulate the hydraulic processes within the wellbore and drill string, incorporating variables such as drilling fluid flow rate, rising flow velocity, bit pressure loss, pipe dimensions, and vacuum generated by the pump. The model was used to assess the sensitivity of drilling depth to changes in fluid flow, pipe wall thickness, outside pipe diameter, drilling rate, and vacuum magnitude. The results show that an increase in fluid flow rate or drilling rate significantly reduces the achievable depth due to quadratic growth in hydraulic losses. Conversely, increasing the outer diameter of the drill pipes or the pump vacuum enhances the maximum depth. These findings can help optimize the design of drilling systems for large-diameter water wells and guide future research on cost-effective and deeper well construction in arid regions. © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits the use, sharing, adaptation, distribution and reproduction in any medium or Commons license and changes need to be indicated if there are any. The images or other third-party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder

В статье рассматриваются стратиграфическое расчленение, литологический состав и условия осадконакопления верхнетриасовых отложений Сегендыкской депрессии Южного Мангышлака. Исследование основано на комплексном анализе геологических и геофизических данных, включая гамма-каротаж, нейтрон-гамма-каротаж, электрический каротаж, потенциал самопроизвольной поляризации и описание кернового материала. Проведена корреляция разрезов по районам Саура-Сегендык, Жангелды и Северное Карагие.