Evaluation And Deployment Of Difficult Reserves In Dujiatai Reservoir

Currently, with the further development of oil and natural gas energy consumption, as well as domestic and international oil and gas energy needs growing, the valuation of hard-to-recover reserves has become increasingly important.Hard-to-recover reserves of oil and gas field development evaluation as a basis for the reservoir design, the result is directly related to the scale of oil and gas field development, development indicators prediction, and the overall benefits are important basis for development and design decisions. Liaohe oil field Lei 39 Dujiatai work area with heavier shaly sandstone and the calcareous cement, poor physical properties, production results have been unsatisfactory. In this paper, Liaohe Oilfield Dujiatai features of heavy reserve-production problem, for Lei 39 well field detailed interpretation and inversion, analyzing the confliction of the development, well placement, and calculation of oil reserves and favorable traps, and made a series of achievements and recognition as follow:(1) We have established an accurate stratigraphic correlation of the division plan and the relationship between the regional stratigraphic correlations. We are clear on the formation of Lei 39 and oil formation contrast features.(2) We Dujiatai reservoir sedimentary facies distribution and changes in spatial distribution of sand bodies have a better understanding. We come to a conclusion of sedimentary facies in the distribution of plane, and analyze the fault zone near the Lei family with favorable reservoir facies and reservoir, so it is favorable reservoir facies.(3) Strata reservoir prediction techniques applied Sha-4 section oil sand body seismic inversion and reservoir prediction, analysis of clastic fragment and structure to the south west direction along the extension of sand takes the shape of the North East to the distribution, the formation of multiple sources of sand bodies in the plane contiguous with each other, in vertical cross.(4) We are figrure out Dujiatai reservoir on reservoir distribution and controlling factors. Work area next to Chenjiasheng depression, various types of traps for the work area provides a rich reservoir of oil and gas source conditions.(5) Through comprehensive analysis of geological research, optimized a favorable exploration target, and targets are found a comprehensive evaluation and analysis, put forward the deployment advice of 4 proposed wells.