Fine Structural Interpretation Of The Fourth Member Of Shahejie Formation In Chundong New Area

The structure of the Chundong New Area is complicated.During the process of development,the contradiction of injection and production occurs frequently.Due to the large number of fault development,the microstructure of the top surface of the small layer is very developed,and the influence of the fault and microstructure on the remaining oil is not clear.Therefore,the fine structure of the target layer of the research area is studied,and the number,grade and combination mode of the fault development and the development type and configuration pattern of the microstructures are analyzed.Making use of three dimensional seismic data,logging data,drilling data and other data to make the calibration horizon of synthetic records,using vertical section interpretation techniques and automatic interpolation techniques to explain the horizons.Using horizontal section technique,coherent body technique,amplitude attribute and dynamic data are used to identify the lower-order faults.Fault classification and combination are carried out according to the scale and distribution characteristics of faults,and micro structural types and configuration patterns are summarized according to the micro structural map of the top surface.The residual oil model is analyzed by the combination of different fault combinations.The influence of the fault on the remaining oil is summarized according to the residual oil saturation and the reserves change,and the influence of the different types of microstructures and configuration modes on the remaining oil is analyzed.There are 96 faults in the study area,and the faults are divided into four levels.The four types of plane combination are parallel,wild goose,oblique and broom,and the four sections are graben and horst,"Y" shape combination,staircase combination and "cabbage type" combination.A total of five micro structural types including micro nose,micro nose,micro break,micro slope and micro groove were identified.The combination of the top and bottom microstructures produced different patterns of microstructural configuration,and five configuration patterns were mainly developed in the study area,of which the top convex bottom convex type developed most.The residual oil is enriched by oblique faults,the residual oil is enriched near the parallel fault,the remaining oil is enriched at the fault bend and the residual oil is enriched at the intersection of fault,and the micro fault nose and the crown convex model have obvious influence on the remaining oil distribution.