The Study Of Reasonable Well Pattern Optimization In Chang8Reservoir Of Heshui Oil Field

As to low permeability oil field, because of its poor reservoir property, great filtration resistance and strong heterogeneity, these reservoir often perform low deliverability and short plateau. As a result, it is vital to supplement some energy to reservoir through injection well. And now a successful development plan depends on a rational flooding pattern.Chang8reservoir in Zhuang9block of Heshui area is the study area of this article. Author identified the best well pattern, well spacing and injection-withdrawal ratio using both methods of reservoir engineering and numerical simulation.Following are the major work:1) Comparing various well patterns that fitted low permeability reservoir and its application.2) Analyzing sensitivity and wettability of Chang8reservoir, together with its lithology, physical property and heterogeneity.3) Identifying the best well pattern, well spacing and injection-withdrawal ratio employing the method of reservoir engineering.4) Establishing3D geological model of lithology, porosity, permeability and water saturation for both layer Chang81and layer Chang82using the software Petrel.5) After history matching, conducting developing simulation of different well pattern, well spacing, injection-withdrawal ratio. Then establish the best development program.