Fine Reservoir Description Of Shanshan Oil Fields

This article discussed the fine reservoir description of Qiketai formation and Sanjianfang formation of Shanshan oil field, based on the theories of high-resolution sequence stratigraphy,reservoir geology, reservoir sedimentary, logging geology,the study of strata, reservoir structure,sedimentary characteristics,logging evaluation and 3d geological modeling of Qiketai formation and Sanjianfang formation of Shanshan oil field,by using comprehensive core observation, well logging, logging, test and analysis, the dynamic of 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 further study of the lithology,electrical response characteristics and lithofacies microfacies combination relations.Based on the 3d seismic data of new interpretation, combining strata research results, the structural model has established in the study area, and gradually make the research in micro structure distribution and developmental characteristics. Based on the previous studies,we identified the facies of Sanjianfang formation is fan-delta facies and braided river delta facies,the Qiketai formation is delta facies,which according to regional background,sedimentary structure,sedimentary rhythm and log facies analysis,on this basis,further divides the reservoir sedimentary microfacies in the Sanjiangfang formation and Qiketai formation of Shanshan oil field,divided into 6 kinds of subfacies and 12 kinds of microfacies,points out the main reservoir of sedimentary microfacies as underwater distributary channel, analyzes the phase space of a single sand layer distribution rule.The reservoir model is established on the basis of log regional correction in the study area, the porosity, permeability and oil saturation explanation are interpretation of 452 wells. the 3d geological modeling and sedimentary microfacies,porosity, permeability and oil saturation is simulated by using sequential indicator simulation method.