This article describes the effectiveness of using the simulated annealing method to solve a series of direct gravimetric problems based on gravimetric monitoring data. It is shown that the use of the developed algorithm makes it possible to increase the reliability of the mathematical model and significantly reduce working time when analysing the measured gravitational field over the developed oil and gas fields. The proposed method is developed as one of the subsystems of a special GIS designed for storage, processing, analysis and visualization of gravimetric monitoring data at an oil and gas field. The article describes the operation of the algorithm and demonstrates the results of modeling. For calculations, a sequence of horizontal prismatic bodies was selected, a priori calculation parameters are indicated, and criteria for searching for optimal solutions are developed.

В статье рассматриваются редкоземельные элементы в рудных полях Шок-Карагай, расположенных в Сырымбетском рудном районе Северного Казахстана. Исследование основано на минералогических и геохимических методах, а также применении геоинформационной системы для визуализации месторождений. Рассмотрены особенности распределения редкоземельных элементов, минералогический состав руд, 3D-модели рудных тел и их связь с геологическим строением месторождения.

В статье рассматривается инновационная конструкция бурового долота, направленная на повышение эффективности буровых работ на урановых месторождениях Казахстана. Работа посвящена проблеме бурения мягких, средних и твердых пород при подземном скважинном выщелачивании урана. Рассмотрены особенности применения твердосплавных резцов и PDC-резцов, а также предложено техническое решение, объединяющее преимущества двух типов резцов в одной конструкции долота.

The long-term development of hydrocarbon reservoirs (HCR) in the geological environment, complex deformation processes occur. Gravity monitoring is carried out to evaluate the possible geodynamic risk and negative consequences from HCR. As a result, the interrelationships of the continuously changing field-geological situation (changes in production volumes, changes in reservoir pressure, processes of fluid injection into productive formations) are investigated. The main tool for solving the gravity inversion when determining areas of increased industrial hazard is the solution of the gravity direct problem. In these studies, proceeding from a given initial approximation of the environment, the problem is realized through successive approximations. To assess such distributions, the authors of the article recommend using the simulated annealing technique within the framework of stochastic optimization. It is aimed at fitting the optimal parameters of the medium provided that a minimal residual of the gravity field values occurs. The approach is implemented using three simple mathematical models of the geological medium such as horizontal prism, homogeneous sphere, and vertical ledge. This technique allows fitting the media values simul-taneously by a pair of its parameters. The operation of the algorithm is described and the simulation results are provided. The results showed acceptable accuracy of the algorithm for solving the direct gravity problem by the proposed method. The simulated annealing technique made it possible to increase the reliability of the HCR model while reduce the time for the analysis of the gravity field

В статье рассматривается экспериментальное исследование повышения нефтеотдачи за счет закачки азота при низком давлении. Работа направлена на оценку эффективности различных методов вытеснения нефти, включая закачку воды, азота и комбинированную водогазовую закачку. Исследование выполнено на примере J-Sandstone Formation Северного Карамандыбасского месторождения. Показано, что закачка азота может повысить коэффициент извлечения нефти в коллекторах со средней и низкой проницаемостью.

В статье рассматривается методика формирования поисковых критериев для месторождений медно-порфирового типа на основе построения эталонных моделей. Исследование выполнено на примере объектов Жунгаро-Балхашской складчатой области. Использованы опубликованные и исторические данные, цифровые базы, растровые и векторные геологические карты, современные геофизические и дистанционные методы, включая аэрокосмические материалы, радиолокационные, инфракрасные и спектрозональные данные.

The report analyzes the effectiveness of geophysical research based on a priori and up-to-date data on the deposits of Central Kazakhstan. The study of the physical and geological prerequisites for the study of the research area by ground-based geophysics methods will make it possible to increase the geological efficiency of geophysical research in forecasting, prospecting and further study of mineral deposits based on the rational integration of field observation methods and the use of modern computer interpretation technologies

В статье рассматриваются особенности включения редкоземельных элементов в рудные минералы редкометалльных месторождений Казахстана. Основное внимание уделено месторождению Баян в Северном Казахстане. Проведено моделирование, геохимическое и термобарогеохимическое изучение, а также построена геоинформационная система месторождения с 2D- и 3D-моделями распределения оксида вольфрама по разведочным профилям и минерализованному объему.

The article presents the results of obtaining a composite material by sintering nickel-containing raw materials mixed with carbon-containing materials, namely using coke and semi-coke. The sintering process was performed at a charge layer height of 240 mm and the temperature of the lower layer was T = 1200 °C. The results of the sieve analysis showed (a fraction of 10 mm) that the yield of a suitable composite material using coke was 68.3% and with semi-coke 67.0%. The average nickel and chromium content in the composite materials was 1.42% and 3.07%, accordingly. As a result of determining the strength characteristics of the obtained composite materials with various reducing agents by dropping from a height of 2 m onto a steel pallet, it was found that the obtained composite materials have high mechanical properties in terms of strength of 81% and 89.2%. The results of the elemental composition at the studied points and the thermal analysis of the studied composite material are presented. The mineralogical composition of the composite material is presented in the form of serpentine and nontronite, and the empty rock is made of quartz and talc. The activation energy of thermal analysis by the method of non-isothermal kinetics were calculated. The results of experiments on the production of composite materials from nickel-containing raw materials will be recommended for obtaining the optimal composition of composite materials at the stage of pilot tests and industrial development of the developed technology for processing nickel ores of the Republic of Kazakhstan. For the processing of nickel-poor nickel ores, it is of great importance to obtain optimal technological and technical and economic indicators that ensure low cost of nickel in the resulting product. © 2024 by the authors.

The abstract presents the results of experimental studies by the method of magnetotelluric sounding (MTS) performed on the territory of the Karazhambas Severny deposit. It is shown that the use of multi-instrument 5th generation of a sufficient amount of a priori geological and geophysical data allows to obtain representative material, allowing you to successfully solve a range of problems associated with the search for hydrocarbon deposits, including a selection of promising oil-saturated areas and the determination of their physical and geometrical characteristics