Research On The Geological Characteristics Of Naiman Oilfield Development And The Adjustment And Deployment Of Water Injection Development

The Jiufutang Formation of Naiman Oilfield is a typical low-bore and low-permeability reservoir.In the course of developing the oil field,there are many problems,such as slow oil extraction,low accumulation and production,fast production decline and difficulty of stable production,which severely restrict the effective development of research area.First,the geological characteristics of Jiufutang Formation in Naiman Oilfield are analyzed in detail.The Jiufutang Formation in Naiman Oilfield is mainly subfacies deposition in the front of shallow fan Delta.Secondly,the characteristics and development status of Naiman oilfield are analyzed,and the primary oil recovery rate is very low.The effect of water injection is mainly influenced by reservoir Geological characteristics,injection ratio,well spacing and viscosity of crude oil.The stratified water injection can effectively improve the water absorption of oil reservoir.Synchronous water injection is better than delayed water injection.Based on the above research,water injection development adjustment and deployment is carried out.Two layers are used in the main part of the na-1 block,while one layer system is used in the other areas.Using rhomboid 270 * 90 well net,30 / km2 well spacing,parallel fracture directional well spacing is 270 M,vertical fracture direction well spacing is 180 m.Finally,the effects of water injection development and deployment are analyzed.The structure of the nine main bodies is higher,the reservoir property is better and the production effect is the best.The new water well is initially injected with general injection method.After continuous injection for a certain period of time,some measures based on the test results of the water absorption profile can achieve better adjustment results.The results of water injection development and adjustment also show that the production effect of water injection region is better than that of non-water injection region,and the output of nine subsections of well network is nearly half lower than that of the old wells around it,and the accuracy of reservoir boundary is improved.The results of this paper are helpful to improve the development effect of Jiufutang Formation in Naiman Oilfield.