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Development of petroleum Geology in China:Discussion on continuous petroleum accumulation

Journal of Earth Science 2013年第5期24卷 796-803页

作者：邹才能陶士振杨智侯连华袁选俊朱如凯贾进华吴松涛公言杰高晓辉王岚汪洁 Department of petroleum Geology Research Institute of Petroleum Exploration & DevelopmentPetroChina Department of Geological Sciences University of Florida

petroleum exploration targets are extending gradually from the single conventional trap reservoirs to the large-scale unconventional continuous accumulations. Oil and gas reservoirs have been divided into two types based on the trapping mechanism and distribution of oil and gas： conven- tional single-trap reservoirs, such as the Daqing oil field in Songliao Basin and the Kela-2 gas field in Tarim Basin; and unconventional continuous petroleum accumulation, such as Upper Paleozoic tight gas and Mesozoic tight oil in Ordos Basin, and Upper Triassic tight gas in Sichuan Basin. Two typical geologic characteristics of continuous petroleum accumulation involve：（1） coexisting source and reser- voir, petroleum pervasive throughout a large area tight reservoirs, and no obvious traps or well-defined water-oil and gas contracts; （2） non-buoyancy accumulation, continuous petroleum charge, and no sig- nificant influence by buoyancy. continuous petroleum accumulation generally have nm-scale pore throats, and the diameters range of 10-500 nm. The geometry and connectivity of these pore throats has significant impact on the migration and distribution of oil and gas in continuous petroleum accu- mulation. China has numerous continuous petroleum accumulation containing various petroleum de- posits, and the exploration of continuous resources is very promising. Unconventional petroleum geol- ogy will become an important new subject in petroleum geology in future, and the nano-technology will function greatly on research, exploration and development of the hydrocarbon accumulation in nano-pore-throats.

关键词： continuous petroleum accumulation unconventional petroleum geology nano-pore- throat tight gas tight oil.

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