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沉积层序的沉积体系域划分和层序岩相古地理图的编制,可用于油气生储盖层空间配置关系的研究分析。湘鄂赣地区不同类型的二叠纪盆地共可划分出11个沉积层序,包括下二叠统栖霞组(层序S_1—S_3)和茅口组(S_4—S_6)以及上二叠统吴家坪组或龙潭组(S_7—S_9)和长兴组(S_(10),S_(11))。每一层序又可划分出二三个HST、TST、LST或SMSF沉积体系域。根据编制的部分层序沉积体系域岩相古地理图,结合各体系域的沉积特征,从平面上和纵向上加以分析,探讨了本区油气生储盖层的空间配置。此方法为从层序地层—层序岩相古地理—油气生储盖至选区评价提供了研究思路和工作模式。
Sedimentary sequences of sedimentary system domain and sequence lithofacies palaeogeography map preparation, can be used for oil and gas reservoirs cover the spatial distribution of the relationship between the research and analysis. There are altogether 11 sedimentary sequences in different types of Permian basins in Hunan, Hubei and Jiangxi provinces, including the Lower Permian Qixia Formation (sequence S_1-S_3) and Maokou Formation (S_4-S_6) and the Upper Permian Wujiaoping Or Longtan Formation (S_7-S_9) and Changxing Formation (S_ (10), S_ (11)). Each sequence can be divided into two or three HST, TST, LST or SMSF sedimentary system domains. The lithofacies palaeogeographic maps of sedimentary system tract were deposited according to the partial sequences compiled, and the sedimentary characteristics of each system tract were analyzed. The spatial distribution of hydrocarbon reservoirs and caprocks in this area was discussed. This method provides a research idea and mode of work from the sequence stratigraphy - sequence lithofacies palaeogeography - oil and gas reservoir cover to the constituency evaluation.