Feasibility Design For Chemical Flooding (Heavy Oil) In Hai-1 Block

Experienced water flooding for many years,Hai-1 block has entered a phase of high water cutting and high recovery degree by 2002,which remaining oil scattered.Influenced by strong heterogeneity and worse well condition,the effectiveness of water flooding become poorer year by year,the scope of EOR became smaller,the development mode need to change urgently.According to the methods of reservoir engineering,numerical simulation and dynamic analysis,development evaluations of water flooding and deep profile correction are carried out,so that the distributing patterns of remaining oil will be analyzed,and the feasibility of chemical flooding will be demonstrated.Based on numerical simulation results,production conditions,reservoir zonation,pressure maintenance and connectivity,the well pairs are optimized,the flooding parameters are designed typically.The feasibility project of chemical flooding in Hai-1 Block was established.The pilot test contains 4 injection wells and 9 production wells.The expected EOR is up to 10.5%.This research fundamentally improves the development effect of reservoir,realizes the sustainable and effective development of reservoir,and provides successful experiences for similar reservoir types.