Study On Sedimentary Facies Of The Second Member Of Kongdian Formation In Shenvsi Region, Cangdong-nanpi Seg

The Shenvsi region is located in the joins position which is between Cangdong depression and Nanpi depression at Bohai Bay Basin, whose west is Cangxian uplift, and east joint with the saddle shape of Kongdian tectonic belt. The region is clipped in the Cangdong fault and Xuxi fault in the western and eastern, and Kongdian formation is a main composite oil and gas source rock and reservoir area, and the Ek2 formation is the major exploration layer. However, this area is in low degree of exploration and the low degree of oil and gas resource which had explored. The study of sedimentary side of this region is one of the key factors, still have to study.Commence this thesis topics based on the above objectives, select the Shenvsi area of Cangdong depression as the scope of the study, take the Ek2 formation for example, applied seismic stratigraphy theory, geophysics theory, sedimentology theory to further refined and systematic study of its deposition phase characteristics and to reveal the chronostratigraphic framework, finally Summarizing sedimentary evolution The Ek2 of this region.(1) Being guided by sequence stratigraphy, study aims to determine the regional sequence boundary of Ek2, based on comprehensive elaboration on semic and logging data. The Ek2 was divided into 2 third-order sequence.(2) Based on the data of the Ek2 in Shenvsi area, such as the characteristics of seismic facies, drilling cores, logging seismic data, the author observed and analyzed three kinds of sedimentary facies, six kinds of sedimentary subfacies, eight kinds of sedimentary microfacies.(3) Combined with the geology background, the author through analyzed the data of Ek2 in Shenvsi area, such as union well profile, plan distribution of seismic facies, sandstone percentage, sandstone thickness, seismic attribute, seismic data, the spread of the sedimentary facies in Ek2,Shenvsi region can be made.(4) Through comparison and induction the the spread of the sedimentary facies of the four reservoir group,finally author Summarize sedimentary evolution The Ek2 of this region.