Study On Rolling Evaluation Of Cretaceous Reservoir In The 12 Area Of Tahe Oil Field

The southern slope of the study area is located in the south of middle part of Shaya uplift in Akekule uplift,has been drilled in shushanhe formation drilling is more,early on sequence stratigraphy,sedimentary facies,geochemical and reservoir prediction,has done some research work in this area,Cretaceous sequence,sedimentary facies the reservoir,and the characteristics of the development of research work,has a certain understanding,and obtains some new results in the production practice.But with the advancement of the work,some problems are constantly emerging,combined with the analysis of real drilling data,the distribution of oil and gas shows that the block is not clear,Yageliemu formation of braided river delta facies,the lower part of the sedimentary plain facies,upper sedimentary subfacies;shushanhe formation in Braided River Delta facies and lake facies,is braided river delta front subfacies and shore shallow lacustrine sedimentary fault intersection,only based on seismic identification shushanhe formation of thin sand bodies will have multiple solutions,wells in the study area are unevenly distributed,with only the drilling data is very difficult to accurately reflect the development status of sand body.By the influence of several key factors,the evaluation work of Cretaceous oil and gas exploration and development has been seriously restricted.This research work is based on the current geological research results,further study of the Cretaceous shushanhe formation,Yage column distribution characteristics of Wood Group oil sand body,comb the fracture system,suitable for prediction of sand inversion software and method of this area in the body,etc.based on the sand body model,describing the distribution of sand body morphology in the reservoir on the basis of the analysis,combined with the structure and the dynamic and static data analysis with drilling for oil and gas,known anatomical reservoir,analysis of main control factors,clear reservoir the type,establishment of reservoir model,focusing on the Yageliemu formation of structural traps,lithologic traps to carry out comprehensive evaluation of Shu Shanhe group.In depth study of fracture development characteristics and hydrocarbon accumulation characteristics,combined with the structure and reservoir research results predict favorable areas,to provide the basis for the next step of the rolling exploration and development.