REGIONAL GEOLOGICAL STUDIES OF DOME-SHAPED UPLIFTS OF THE TARIM SEDIMENTARY BASIN

Abstract

He regional geological study of the Tarim sedimentary basin, located in the tectonic zone of the Donkhetang fault, is of national interest. The Tarim sedimentary basin is an ultradeep and complex basin. A number of anticline structures are confined to the central part of the Tabei uplift. In the structure of the tectonic belt, two inversion faults take part, with the formation of a structural nose. Domed uplifts lie at a depth of 6000 meters, the thickness of the prospective layers reaches 20 meters. Combining regional geological studies and the results of sedimentary facies studies, the rocks of the prospective formations are a transgressively controlled sandstone layer, which uses the environment of deltaic sediments as a background. Based on the results of modern sedimentary studies, the characteristics of the Donghae sandstone are analyzed. To study the Tarim sedimentary basin, a complex of regional studies related to the geological study, the tectonic structure of the region, lithological-stratigraphic studies, sequence-stratigraphic studies, studies of the physical and reservoir properties of rocks, regional studies of the thickness, uniformity and strike of the studied layers was carried out. The main target objects are a group of reservoirs of the Jurassic and Carboniferous periods. Proven geological reserves of oil and gas have been recorded in the Tarim sedimentary basin.