The Study Of Oil Layer Contrast And Microfacies And The Application Of Oil Field Development In The East Of The Fault Block In Beiyi District

The major oil exploration in Sa-zhong Development Area is a large changed river - delta clastic oil layer. Its Sand and mud alternate frequently. Microfacies on the same plane change largely and they have large differences in reservoir properties. Through comprehensive comparison method, This thesis is the fine contrast in Sa, pu, gao oil stratum of Sa-zhong Development Area. We can establish the High-Resolution Sequence Stratigraphic Framework based on the explanation of single well logging data and the contrast of oil stratum.Through comprehensive study of the shape and character of the standard level oil well logging curve in the new series of logging conditions, we can affirm the first level and the second level indicate layer and contrast the fourth-order sequences and the fifth -order sequence with small layers of oil stratums. After the establishment of the boundaries and electrical character of oil stratum,we can make sure the boundaries of oil stratum in Sa-zhong Development Area.The results show that Sa, pu, gao oil stratums can be divided into three groups, 10 oil layers, 43 sandstones, 144 small layers and 158 units. The study provide the basis data.for the prediction of favorable oil area about the sandstone distribution, microfacies, reservoir heterogeneity ultimately.In the Sequence Stratigraphic Framework, through the explanation and analysis of rock and electrical character of 400 wells and six oil layers in the east of the fault block in Beiyi district, the area of the S + PII Group can be subdivided into 51 sedimentary units, and we describe each type of sand body particularly.By the study of microfacies,we can know the six different types of sand body and establish the sand model.By the study of heterogeneity analysis and remaining oil distribution in high water stage, we can know that class two reservoir has thick and good physical layers. It has a higher degree use. Remaining oil mainly distribute in the top of the thick oil layer that no water reach, the bad location ,the interlayer at the shelter, the areas that well don't control and the injection is imperfect .This thesis apply the study into project of the east of the fault block in Beiyi district . It is the basis of further dynamic analysis in high water stage.