The article examines the genesis and distribution of sand bar reservoirs formed during Mesozoic transgressive-regressive cycles in the northern Turan Plate, including Mangyshlak, Buzachi, Northern Ustyurt and the northwestern Aral Sea. The study analyzes sedimentological, paleogeographic and tectonic factors controlling the formation of reservoir bodies and identifies new prospects for hydrocarbon exploration.

The article presents a comparative study of rare earth element fractionation in sandstone-type and magmatic uranium ores. The authors used a rapid ICP-MS method after microwave digestion and compared REE distribution patterns in uranium ore samples from Kazakhstan with data from Australia and Tanzania. The results help to assess uranium ore paragenesis and deposit classification.

The article studies the chemical composition of silver halides and associated mineral phases in the oxidation zone of the Arkharly deposit. Using electron probe microanalysis, the authors identified native silver and silver halides with variable Ag–Cl–Br–I composition. The results show a significant role of supergene redistribution processes and indicate iodine enrichment in circulating solutions.

Purpose. The paper concerns additional geological appraisal and identification of extra localization criteria of cupriferous mineralization of a stratiform type. The research is intended to define physical and geological factors influencing sandstone distribution within the north-end of Zhezkazgan synclinal in the Central Kazakhstan. Methods. A complex analysis of geological and mineralogical, geophysical, and geochemical data was carried out relying upon the information obtained from deep-hole wells. Modern methods to process and interpret the field data were applied. The analysis involved lithological dismemberment of the productive Taskuduk suite as well as determination of sulfide mineralization zone boundaries. Findings. The research has shown that the productive levels reach down to 1500-m depth. The data interpretation has helped specify the geological structure and develop a model of ore-promising bodies of cupriferous sandstones at great depth. The applied complex data analysis has increased potential to prospect new loci of productive cupriferous sandstone deposits of Zhezkazgan type. Originality. The research has contributed significantly to understanding of the physical and geological factors influencing the copper ore distribution in deep layers. New physical and geological criteria, determining deep copper mineralization localization, have been identified which were not considered by earlier similar studies.

В статье рассмотрен инновационный подход к интерпретации тектонических нарушений Южно-Торгайского осадочного бассейна по данным высокоплотной сейсмической съемки МОГТ-3D. На основе обработки, интерпретации и моделирования получена объективная информация о тектонической структуре, генезисе и геодинамике объектов нефтегазопоисковых работ в Арыскумском прогибе. Результаты исследования позволили уточнить строение залежи, выявить роль сдвиговой тектоники в формировании сводовых структур, а также рассмотреть перспективы нефтегазоносности доюрских образований региона.

В статье рассмотрены технологии регионального прогноза нефтегазоносности Южно-Устюртского региона с применением цифровых технологий, искусственного интеллекта, машинного обучения и комплекса геолого-геофизических данных. Использованы материалы аэрогамма-спектрометрии, грави- и магнитометрии, геотермии, структурного моделирования и геопространственного анализа. Применение нейронных сетей, инверсии и модулей IP Seismic позволило выявить скрытые закономерности геофизических аномалий, построить геоплотностные и геомагнитные модели, а также выделить наиболее перспективные участки для дальнейших геологоразведочных работ.

В статье рассмотрены результаты апробации беспроводной сейсмической технологии STRYDE в Актюбинской области в зимних условиях. Проведена оценка её технологических, эксплуатационных и геолого-информационных характеристик, а также выполнено сравнение с традиционными кабельными системами. Показано, что технология STRYDE обладает высокой автономностью, устойчивостью к внешним воздействиям, снижает логистические издержки и обеспечивает качественную регистрацию сейсмических данных в труднодоступных и сложных районах. Полученные результаты подтверждают перспективность применения данной технологии в геологоразведочных проектах Казахстана.

The present article is devoted to the issue of studying the patterns of displacement of superincumbent rock over panels of a mine obtained using advanced seismic technologies, allowing for the study of the boundaries of caving zones in the depths of rock mass. A seismic exploration has been performed in local areas of Zhomart mine responsible for the development of Zhaman-Aybat cuprous sandstone deposits in Central Kazakhstan at the stage of repeated mining with pulling of previously non-mined ore pillars and superincumbent rock caving. A 2D field seismic exploration has been accomplished, totaling to 8000-line m of seismic lines using seismic shot point. The survey depth varied from 455 m to 625 m. The state-of-the-art technologies of kinematic and dynamic analysis of wavefield have been widely used during data processing and interpretation targeted at identifying anomalies associated with the structural heterogeneity of the pays and rock mass, engaging modern algorithms and mathematical apparatuses of specialized geodata processing systems. The above effort resulted in new data regarding the location and morphology of the reflectors, characterizing geological heterogeneity of the section, zones of smooth rock displacement, and displacement of strata with significant disturbance of the rocks overlying mined-out productive pay. The potential of the application of modern 2D seismic exploration to studying an underworked zone with altered physical and mechanical properties located over an ore deposit has been assessed. The novelty and practical significance of the research lies in the determination of the boundaries of zones of displacement and superincumbent rock caving over the panels obtained using state-of-the-art technologies of seismic exploration. The deliverables may be used to improve the process of recognizing specific types of technogenic heterogeneities in the rock mass, impacting the efficiency and safety of subsurface ore mining, both for localization and mining monitoring.

This study presents a machine learning approach for petrophysical core classification, applied to data from the southeastern margin of the Precaspian Depression. The Random Forest algorithm was selected as the primary method due to its effectiveness in processing nonlinear and high-dimensional geological datasets. The model achieved 89% accuracy and an F1-score of 0.90 in lithotype classification. The results show that porosity and permeability are the most influential parameters for lithofacies mapping and reservoir property evaluation.

This article presents the results obtained from a high-resolution wide-azimuthal 3D seismic reflection method used for the prediction and detailed exploration of complex ore targets in the Zhezkazgan ore district of Central Kazakhstan. We demonstrate the ability of modern seismic data processing and interpretation systems to identify underground mine objects associated with stratiform copper sandstones and improve geological models. The 3D seismic imaging tools, along with the implementation of a modern seismic processing sequence, allow for the clarification of geological structures in the studied area. The target stratigraphic horizons, large faults, and microtectonic disturbances (small faults and cracks) are clearly delineated in the seismic volumes. The use of seismic attribute analyses on geological data is tested to identify ore horizons and deposits with volumetric predictions of copper mineralization. Recommendations for further exploration drilling were developed, and five new wells were drilled. Copper mineralization was confirmed in all recommended wells. We carried out a marketing review in Kazakhstan and uncovered an increased interest among subsoil use companies in 3D seismic exploration technology to investigate existing mining objects of different genetic types. These results demonstrate the expediency of 3D seismic exploration aimed at identifying ore targets.