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Reservoir characteristics and controlling factor of tight sandstone in Shuixigou Group in Taibei depression,Turpan-Hami basin

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Energy Geoscience 2024年第2期5卷 70-80页

作者： Tong Lin Xuan Chen Fan Yang Hongguang Gou Mingyu Liu Runze Yang PetroChina Research Institute of Petroleum Exploration&Development Beijing100083China Research Institute of Exploration&Development PetroChina Tuha Oilfield Company HamiXinjiang839009China China University of Geosciences(Beijing) Beijing100083China

The positive structure belts surrounding the Taibei Sag,Turpan-Hami Basin,have been the main targets for oil and gas exploration for years and are now left with remaining resources scattering in reservoirs adjacent to source rocks in the sag,where the Shuixigou Group with substantial oil and gas potential constitutes the primary focus for near-source ***,characterization of development and key controlling factors of reservoir space becomes a must for future exploration in the *** study investigates the development traits,genesis,and controlling factors of the Xishanyao and Sangonghe formations in the Shengbei and Qiudong Sub-sags of the Taibei Sag with techniques such as cast thin-section observation,porosity and permeability tests,high-pressure mercury injection,and saturation fluid NMR analysis of reservoir *** findings reveal that the Shuixigou Group in the Taibei Sag consists of lithic *** in the group are mostly poor in terms of physical properties,with undeveloped primary pores dominated by intergranular dissolved pores as a result of a strong *** analysis of key controlling factors of the Sangonghe Formation reveals significant distinctions in sandstone particle size,sand body thickness,genesis and distribution,provenance location,and source rock type between the Qiudong area and Shengbei ***,the coal seams of the Xishanyao Formation exhibit heightened development with shallower burial depth and lower maturity compared to those of the Sangonghe ***,this environment fosters the formation of organic acids,which have a stronger dissolution effect on minerals to develop secondary dissolution pores,and ultimately resulting in better reservoir physical ***,the reservoirs within the Qiudong area of the Taibei Sag demonstrate superior characteristics compared to those in the Shengbei ***,the reservoir physical properties of the Xishanyao For

关键词： Intergranular dissolved pore organic acid dissolution Secondary dissolution pore Tight sandstone Shuixigou group Turpan-Hami basin

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