Enhanced Oil Recovery Technical Research And Application Of Gas-Gas Foam Injection In Light Oil Reservoir

It's a creative enhanced oil recovery (EOR) new technique to explore light oil reservoir by injecting gas or gas-foam.The dissertation begins from the present condition and trend of domestic and abroad's gas injection and gas foam injection EOR technique,analyses the importance and new development of this technique.Based on the reservoir geology character- istic and development actuality of Zhong Yuan Reservoir,the paper contrasts the apparent effect by using the technique in the later period of water flooding in other reservoir both in domestic and abroad, demonstrates the possibility of foam flooding technique in light Oil Reservoir of Zhong Yuan Reservoir,argues that there is a good foreground in Zhong Yuan Reservoir.The main body of this paper is as follows:it concentrates on the principle and application qualification of gas injection and foam injection EOR;it firstly gives the applica- tion condition and apparent effect of gas injection and gas-foam injection in Bai Se Reservoir in GuangXi and Wu Qi Reservoir in ShanXi which has a referent meaning,secondly chooses Hu 12 th Block in The fifth oil plant in Zhong Yuan Reservoir as experiment place of foam injection,then collects some of its oil samples to experience domestic flooding experiment including dynamic simulation expeirment of homogeneous high pressure long oxide pipe and simulation experiment of gas-foam injection in anisotropic long oxide pipe, the conclusion is that flooding efficiency of gas-foam injection after water flooding can be enhanced by 44%, so gas-foam injection is an efficient method for high water content reservoir in Zhong Yuan Oil Field;On the basis of the analysis and room experiment,Zhong Yuan Reservoir explores a precurser gas-foam injection experiment in one layer in S3,Hu 12th Block,analyses the techni- que measure of corrosion prevention and safety in every parts of gas injection which include gas compressor,ground pipe lines,gas injection wells, reservoir condition, production wells and production devices ,confirms the technics and devices that can meet the geology condition of Hu 12th Block, implements some gas-foam injection on-site test and gets some period recognition, acquires the prospective effect.