Study On Sedimentary Facies Of The Ek₂²Reservoir Group In Cangdong Seg, Shenvsi Region

The Shenvsi region is located in the joins position which is between Cangdongdepression and Nanpi depression at Bohai Bay Basin, to the west is Cangxian uplift,to the east is joint with the saddle shape of Kongdian tectonic belt. The region isclipped in the Cangdong fault and Xuxi fault in the western and eastern, andKongdian formation is a main composite oil and gas source rock and reservoir area,and the Ek22formation is the major exploration layer. However, in the practice work,this area is in low degree of exploration and the low degree of oil and gas resourcewhich had explored. In the study of sedimentary side of this region there are differentopinions.Commence this thesis topics based on the above objectives, select the Shenvsiarea of Cangdong depression as the scope of the study, take the Ek22formation forexample, applied seismic stratigraphy theory, geophysics theory, sedimentologytheory to further refined and systematic study of its deposition phase characteristicsand to reveal the chronostratigraphic framework, finally according to the analysis ofthe petrophysical property of this area to predict the advantaged reservoir.(1). At the fewer drilling area, based on the Seismic Data of Ek22, such as thesame external shape of shaft, internal structure, connectivity, amplitude, and integratewith data that the basin type divided the seismic facials of Ek22, the author identifiedsix type of seismic facies and four type combination seismic facies.(2).Based on the data of the Ek22in Shenvsi area, such as the characteristics ofseismic facies, drilling cores, logging seismic data, the author observed and analyzedthree kinds of sedimentary facies, six kinds of sedimentary subfacies, eight kinds ofsedimentary microfacies.(3).Combined with the geology background, the author through analyzed the dataof Ek22in Shenvsi area, such as union well profile, plan distribution of seismic facies,sandstone percentage, sandstone thickness, seismic attribute, seismic data, the spreadof the sedimentary facies in Ek22，Shenvsi region can be made.(4).Through analyzed the seismic attribute, sandstone percentage and sandstonethickness data of Ek22, the author analyzed the sandstone plan attribution. Based onthe comprehensive analyzed geophysical inversion feature, sandstone attribute characteristics, plan distribution of sedimentary facies characteristics, the typicalphysical characteristics of sedimentary microfacies and the plan distribution ofphysical properties characteristics, the author identified there are three favorablesandstone reservoirs region at Shenvsi area, which provided the basis for explorationand development.