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陆内克拉通盆地是我国重要的含油气盆地类型之一,其层序地层学研究相对薄弱.以我国典型的陆内克拉通盆地-鄂尔多斯盆地山西组的层序地层学研究为例,提出陆内克拉通盆地长期持续退积、短期进积“溯源退积”层序构型的模式.其涵义是指陆内克拉通盆地所形成的三级层序的层序构型均以LST为主,TST和HST相对不发育,对应的基准面旋回具有长期持续退积(水进)、短期进积(水退)旋回特征;不同级别层序地层格架控制下的砂体,自下而上(从老到新),具有向北部物源区依次退积叠置的“溯源退积”特征.
The Lukikatong basin is one of the most important petroliferous basin types in China, and its sequence stratigraphy is relatively weak. Taking the study of sequence stratigraphy in Shanxi Formation, a typical intracontinental cratonic basin in the Ordos Basin as an example, The Nekratong basin has been continuously retrograded for a short period of time and has a short-term sedimentary pattern of “retrogressive retrogradation”. The implication is that the sequence stratigraphy of the tertiary sequences formed in the intracontinental cratonic basin are characterized by LST , The TST and HST are relatively undeveloped, and the corresponding base-level cycles have long-term continuous accretion (water inflow) and short-term accretion (water retreat) cycles. Sand bodies under the control of different stratigraphic sequence stratigraphy frames And on the (from old to new), with the source region to the north of the deposition and deposition of the “traced back” feature.