Evaluation Of Well Pattern Densification Effect Of Nanliang Chang4+5 Reservoir

The Nanliangchang 4+5 reservoir began encryption in 2013,and currently faces the following three problems: diamond-shaped well pattern injection and production cannot be produced;affected by heterogeneity in the layer,uneven water flooding on the plane;affected layer Due to the heterogeneity between the two,the water absorption on the profile is uneven.In view of the above problems and technical bottlenecks,this article starts with the Nanliangchang 4 + 5 Reservoir Encryption Development Block and makes full use of the acquired reservoir data information: well logging,testing,dynamic monitoring,and analysis obtained in the block Laboratory and other information.On the basis of the division of single sand body,conduct research on the correspondence relationship between sedimentary microfacies,sand body distribution and injection and production of well groups;use dynamic production data to analyze production characteristics,identify dynamic cracks and analyze the characteristics of water flooding before and after encryption;Based on the geological foundation and the description of dynamic characteristics,the effect of encryption development is evaluated,and the existing problems and main influencing factors in production are revealed.The research results can optimize the existing technology policies and have important practical significance for improving the recovery rate of Nanliang Oilfield.