Abstract
The results of the study of the influence of overburden stress in a solid mass undisturbed by mine workings on the compaction of sandstones within mine fields, exploration areas of Donbas coal deposits and some gas condensate and oil and gas condensate deposits of the Dnipro-Donets Depression (DDD) are presented. Regularities of changes in gas-bearing properties of porous reservoirs with the increase of overburden stress in an undisturbed solid mass, or its decrease in mine conditions are considered. The possibilities of rapid assessment of the forecast position of prospective sand reservoirs in the cross-section of the gas-bearing stratum are shown. Methods are proposed for calculating the position of sandstones of gas-bearing stratum, in which it is advisable to search for gas accumulations and its extraction in the coal and gas, oil and gas condensate and gas condensate fields of Donbas and DDD.
Highlights
The growth of the country's economy is impossible without providing it with the necessary resource base, in which the fuel and energy component plays an important role, orienting itself, in many respects, to the traditional hydrocarbon energy raw materials – coal, oil, and gas
The methodological basis of the research was the systematization, analysis and synthesis of geological data characterizing the reservoir properties of sandstones, the calculation of the depths of the maximum potential gas saturation of sandstones in gas condensate and oil and gas condensate deposits of Dnipro-Donets Depression (DDD) and their comparison with similar deposits in Donbas
Earlier studies [1, 2] allowed to establish the regularities of changes with depth of reservoir properties and potential gas saturation of sandstones in some geological and industrial areas of Donbas, which served as the basis for calculating the predicted values of depths in the cross-section of coal-bearing stratum, favorable for the accumulation of significant amounts of methane in sand reservoirs
Summary
The growth of the country's economy is impossible without providing it with the necessary resource base, in which the fuel and energy component plays an important role, orienting itself, in many respects, to the traditional hydrocarbon energy raw materials – coal, oil, and gas. The article discusses current issues currently facing the geology of hydrocarbon gases, aimed at involving additional volumes of energy carriers in the country's fuel and energy balance and affecting the problem of finding gas promising sand collectors First of all, these questions concern traditional and unconventional energy carriers, among which, undoubtedly, methane of coal mines (CMM – coal mine methane) and methane of closed mines (CAM – coal abandoned methane) occupies an important place. These questions concern traditional and unconventional energy carriers, among which, undoubtedly, methane of coal mines (CMM – coal mine methane) and methane of closed mines (CAM – coal abandoned methane) occupies an important place The relevance of these issues is confirmed by the fact that the extraction and use of methane from coal mines is possible, and implemented on an industrial scale in many countries, including Ukraine. The substantiated scientifically and practically confirmed answers to the above questions will help develop some promising directions for searching for hydrocarbon accumulations, choosing criteria for assessing the gas content of sand reservoirs and calculating the location parameters of the most promising gas-saturated zones in the cross-section of coal and gas, gas and gas condensate fields, which will allow to organize more reasonably and develop their effective development
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