Research On Micro-structural Characteristics Of Shanshan Oil Field

This article got a precise classification and correlation of Qiketai formation and Sanjianfang formation, a fine structural description and Characteristics of microstructure in Shanshan oil field, based on the theories of high-resolution sequence stratigraphy, reservoir geology,3D seismic interpretation and other methods or techniques, by using comprehensive core observation, well logging, logging, seismic data the dynamic produce data and other dynamic and static data.In the high-resolution sequence stratigraphy guidance, based on mark layers, the reservoir sedimentary unit is divided into 3 oil reservoir groups(Long-term base-level cyclic sequences),6 sand groups(Metaphase base-level cyclic sequences),22 substratum(Short-term base-level cyclicsequences),46 single layers in the study area, according to the precise classification and correlation of stratigraphic sequence on the research area. Based on the fine interpretation of the new 3D seismic data, combining well-seismology combined methods, coherence cube technique and horizontal slice, the structural model has established in Qiketai and Sanjianfang formation, the 65 faults were found and most of them were distinguished first. Based on the fine structural interpretation and sedimentary characteristics, we progressively identified the micro structural type, cause, regularities of distribution and developmental characteristics in the study area. By research on the micro-structural characteristics combined the dynamic produce data, we identified the relationship between micro structures and oil and gas accumulation, the relationship between micro structures and oil well production and the relationship between micro structures and remaining oil. Based on the previous studies, we provided guide of the remaining oil distributing, the well positions of increasing oil well and water injection well and increasing production of old oil wells, to raise the recovery ratio and water driving level.