Lineament system in relation to oil and gas content at great depths (using the oil and gas basins of Tarim and Sichuan as an example)

The article considers the current problem of hydrocarbon deposits search and forecasting in the conditions of depletion of traditional fields. Examples of successful discoveries in the Gulf of Mexico, on the northern coast of Alaska and in the Tarim and Sichuan basins are presented, which confirms the high prospects of ultra-deep horizons (6000 m and more) as a source of replenishment of the resource base. However, the key issue remains the preservation of the filtration-capacitive properties of reservoirs at such depths. The article focuses on the importance of lineaments that can be identified using aerial and space images. Lineaments, which are rectilinear relief elements, are associated with breaks and fracturing, and their study enables to obtain a continuous image of the geological structure. Particular attention is paid to regular systems of lineaments, known as the «regmatic network», which have a regular orientation and can serve as an important indicator for forecasting the oil and gas content of the subsoil. The article emphasizes the need for further research in this area for the efficient use of resources at great depths. The deciphered systems of lineaments of the Tarim and Sichuan oil and gas basins are considered. The geometric features of the lineament network and their statistical characteristics are revealed.

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