| The essential characteristics of Deyang-Anyue interplatform rift and its formation and evolution are illustrated in the paper. And it is also discussed the controls of Deyang-Anyue interplatform rift on the Sinian reservoir formation. Then four achievements were obtained, as follows: (1)The interplatform rift shows a north-south distribution, and covers an area of 60000km2, with a length of 300km, and a width of 50~230km. Deep-water shale and argillaceous dolomite were deposited in the trough. (2)The interplatform rift forming is closely related to three factors of continent breaking up, faulting and differential sedimentation, and experienced eight tecotinic evolution stages from late Sinian(early deposition of Dengying Fromation) to early Cambrian(middle-late deposition of Qiongzhusi Formation), including four times extensional movement, three times exposure-denudation, and a rapid filled decaying stage. (3)Three sets of source rocks, including three members separately from Dengying Formation, Maidiping Formation and Qiongzhusi Formation, developed in the interplatform rift, where is the hydrocarbon generating center and the hydrocarbon supplying center. Dolomite reservoir of member 2 and member 4 of Dengying Formation developed with large area on both sides of the rift, and the high quality reservoir distributed along interplatform margins. Source rock and reservoir contact laterally. (4)It is put forward that the zones along the both sides of interplatform rift are the most prospective region of Sinian exploration. And the eastern side of it is preferred in recent exploration. It is predicted that Jiulongshan structure in Suining-Jiange area and Yanggaosi structure in Rongchang-Luzhou area should be the next exploration targets. |
