Research On Reservoir Description And Injection-production Adjustment In Sh105-106 Area

The area of Sh105-106 has the problems of low well pattern control degree, low production ratio of the reservoir, shortage of natural energy, low dynamic Liquid level, Large differences in the average capacity, Large differences in properties between the layers, none system classification for the developing layers, imperfection of Injection-production well-net. Based on drilling, dynamic data of oil and water Wells, and so on, establish reservoir geological model through the study of the reservoir structural, sedimentary facies analysis, reservoir heterogeneity research, etc. And then predict the distribution of remaining oil, according to the predicted results of the work area for the study of restructuring of injection-production well pattern adjustment.The study sets that the top surface structure -Sh105 fracture block of the under section of Ng3 is homocline, Sh106 is fracture faulted anticline, and 6 sand layer, developed braided river facies, subject is river and river subfacies, the northward of 1st and 6th layer developed the flood plain subfacies, and slightly developed Diara microfacies. The up layer of Es3-Shi05 fracture block is fault nose structure, which has 2 sand groups—nine sand layers, developed Delta facies and lake facies, developed former delta, delta front, sedimentary 9-5 sand body in the early period and developed shore shallow lake、Sedimentary sand body 4-1 in the last. The research found that the under section of Ng3、the up layer of Es3 had great difference in the heterogeneity, mainly with the strong heterogeneity. Established study area geology model, and calculate the geological reserver. Through reservoir numerical simulation, predicting the remaining oil distribution. According to the fact of high viscosity oil under Ng3, energy shortage of up Es3, adjust the development plan. Then design 9 wells in under Ng3, including 7 new wells,2 old wells, using horizontal well steam injection way to produce oil; design 14 Wells in up Es3, using 7 old wells,4 converted production Wells, 3 new drill water Wells.