Conditions of Oil and Gas Accumulation in Qingshuihe Formation of Shinan Area, Junggar Basin

Abstract

Abstract: In order to expand the prospecting achievements in Cretaceous strata of Shinan area in Junggar Basin, stratigraphic classification and hydrocarbon accumulation condition analysis are re-performed for the Qingshuihe Formation by the comprehensive use of seismic forward modeling, seismic inversion and seismic attribute etc. Both sedimentary cycle and well logging curves are used to determine the marker bed, based on which a unified framework of the whole area is established through the integration of well data and seismic data, and the ancient landform during the deposition of the first member of the Qingshuihe Formation is characterized. Gullies developed in Shinan area control the distribution of sedimentary facies and high-quality reservoirs are found in the down-incised scour channels. Reservoir prediction and hydrocarbon detection can prove that high-quality reservoir with a floor is the first condition for oil and gas accumulation and oil-bearing sand body is the favorable target for drilling. Multiple favorable targets are determined by using density inversion and seismic attribute fusion methods, which reveals the good oil and gas exploration prospects in the area.

Key words: Junggar Basin, Shinan area, Qingshuihe Formation, oil and gas accumulation

QU Jianhua, WU Tao, FEI Liying, ZENG Delong, ZHOU Liping, LIU Zhenyu. Conditions of Oil and Gas Accumulation in Qingshuihe Formation of Shinan Area, Junggar Basin[J]. Xinjiang Petroleum Geology, 2017, 38(zk(English) ): 53-59.

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