Study On Strike Slip Fault System In Eastern Kuche Depression In Tarim Basin

Kuche depression in Tarim Basin is an important gas source for the west east gas transmission. At present, a large number of oil and gas exploration in the region has been carried out, and the results have been obtained. However, with the area of oil and gas resources are mainly concentrated in the western part of the depression, in the Kelasu structure. Depression in the eastern part of the only found a large oil and gas fields, in depression in the eastern part of the oil and gas resources diversity, conventional oil and natural gas and non conventional oil and natural gas joint development, structure types, underground geological conditions are changing is the key area of oil and gas exploration and breakthrough in the region. The focus of this paper is to strike slip fault development as the starting point, systematic study of the strike slip faults and Kuqa depression depression in the eastern part of the characteristics of the geological structure, the development of trap types and oil and gas distribution.Comprehensive application of 3D and 2D seismic data, drilling data, geological outcrop data, satellite photos and gravity, magnetic and electric information, Kuqa depression of Tarim basin depression the eastern section of the geological structure and characteristics and fracture distribution and stratigraphic distribution of the system research. To realize in under the background of South Tianshan extrusion, Kuqa depression depression east mainly developed two sets of decollement and three major strike slip fault, extrusion, strike slip, slip form Kuqa depression depression in the eastern part of the structural system. Tectonic belt can be divided into according to the creek tectonic belt, the tectonic belt, in the eastern Qiulitag structural belt, belt on the north slope of DI and Yangxia sag depression.On the basis of the above research, the research on the development characteristics of the strike slip faults in the study area is carried out. Through of Kuche depression, depression in the eastern part of the flower structure, an echelon folds, dolphin effect such as strike slip fault identification of tectonic style, combined with other information system explain the Kuqa depression in the eastern part of the three major strike slip faults location and characteristics; Eastern Kuche in strike slip faults and west to crush fracture mutual transformation, gradually formed the things block, north to South with grid structural pattern and the distribution of faults.In oil and gas accumulation process, South Tianshan compression forming good anticline and tight reservoir layer conditions, Kuqa depression depression in the eastern part of the strike slip faults formed the favorable hydrocarbon expulsion, migration and reservoir reconstruction condition of Dina gas field group, North Di gas reservoirs of oil and gas reservoir.