The Characteristics Of Badaowan Reservoir In Well Block Che35,the Junggar Basin

Well Block Che35 is located in the northwest of Junggar basin,the southwest of the Chepaizi oilfield.Badaowan reservoir's middle depth is 1160 meter,belongs to structural-lithological reservoir.There is no deep research on this area from the reserves report in November,2011.Now,opposite seven points well network and 350 meters well spacing to water drive is adopted in Well Block Che35.And the recovery percent of reserves of Badaowan reservoir is 4.48%,the average water cut is 38.7%.However,with the extension of develop time and increase of recovery,serious situations that moisture content is increasing rapidly and efficiency of water oil displacement is reducing are faced with Badaowan reservoir.Based on the medium prosperous and medium permeable reservoir of Badaowan group,seismic data and well logging data are used to interpret section and divide strata,and the research area's sedimentary micro facies are fine characterized.Then with the summarize of the geological features and evaluation of Badaowan reservoir,the three-dimensional geology model is established.Through the analysis of dynamic profiles,theoretical model is utilized to stimulate the distribution of remaining oil and the reservoir's production performance character.The results show that:(1)The Badaowan formation is divided into braided river predelta and braided river delta front subfacies,including underwater distributary channel,mouth bar,distal bar,tributary bay and predelta mud.(2)The Badaowan reservoir is medium prosperous and medium permeable,the plan changes of prosperity and permeability differ largely,and the reservoir heterogeneity is strong.(3)The simulated result of remaining oil shows that the remaining oil is rich in the northeast of research area.The high remaining oil saturation area is in blocky shape and the thickness is relatively large,so reserve abundance is high in the northeast of research area.(4)According to water-drive characteristic curves and Tong's Chart,the water-drive recovery factor is 26.7%.Through the above work,the injection-production pattern of Badaowan reservoir should be adjusted.