Mountains And Rivers Area In Ordos Basin Extension Group 6 Reservoir Waterflood Development Plan Design

ZhongShanchuan area is local in ZiChang county ShanXi province. Tectonic on the central part of the northern ShanXi Ordos basin slope. The study area with simple structure which is abroad west-dip monoeline. The slope angle less than1°. Fracture, fold are not developed, some areas with nose-like structure locally because of the differential compaction. Chang6is main oil bearing series in Late Triassic which is Lithologic reservoir and widely distributed in the study area. Chang612is main oil bearing layer in Chang61.Sandstone connectivity is good with large thickness. The deposition system of Chang6member is the delta front sedimentary system, have five rivers along the NE-SW distribution, which is the low permeable reservoir with bad reservoir physical property, low permeability, narrow channel which oil and water pass by, very strong percolation flow resistance force. Because of the relatively shallow burial depth mainly uses waterflood recovery.The thesis is from Triassic Chang6] of WaYaopu oil production plant of the Ordos Basin. Use of theoretical knowledge of sedimentary petrology, petroleum geology, reservoir engineering and base on the drilling, logging, testing data. Describes the structural feature, sedimentary facies features, sand-body distribution and reservoir distribution. Research on reservoir characteristics and design the development project. Although the Chang6reservoir and overlying Chang4+5reservoirs both have oil and gas accumulation and high degree of compound, through the analysis of that argument that Consider of the economic benefits the development project should be developed in one layer series of development and in one well pattern. That is main develop Chang6reservoir only and let Chang4+5reservoir as back-up resources. We can see through the numerical simulation that the best the reasonable well spacing density is20well/km2, the average well distance is200-220m.recovery percent of reserves17%, significantly better than the use of natural energy exploitation.