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THE SEDIMENTARY CHARACTERISTICS AND HYDROCARBON POTENTIAL OF SHIWU FAULT BASIN IN SONGLIAO BASIN

TANG Li ming (Northeast Petroleum Bureau of Newstar Company, SINOPEC, Changchun 130062,China)  
The deposition of Shiwu fault basin is characterized by the fan-deltas faces which are composed of alluvial fans, fan deltas and lake bottom fans deposited quickly with coarse and proximal provenance detritus, lack of normal delta. The development of Shiwu fault basin experienced three stages of fill, expansion, and shrinking. The first stage developed alluvial fans, braided streams and coal forming swamps. The second one produced the sedimentary assemblage of deep lakes, lakebed fans and fan-deltas. The final one generated the assemblage of shallow lakes, deltas and flooded shore plains. A plentiful of source rocks determined by the excellent basin type together with various compound traps came from the diversiform sedimentary systems gave the result of the better hydrocarbon prospecting of Shiwu fault basin.
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