Research On Eor Using Hot Water/chemical Flooding In Shang10-49 Block

The Shang 10-49 block has the characteristics of viscous oil and thin reservoirs,Average monolayer effective thickness 2.3m,average surface viscosity of crude oil at 2000 mPa.s.In the process of mining,because this piece of natural energy shortage,poor physical property,reservoir heterogeneity,mutual permeability vary greatly,resulting in water flooding after advancing speed varies,coupled with high oil viscosity,oil flow difference,after water breakthrough,water cut rising rapidly,causing the oil production decline.In view of this situation,sand pack experiment of crude oil in the indoor area,study of oil displacement efficiency in hot water flooding under different temperature.And According to the reservoir conditions and fluid properties in the block of Shang10-49,The feasibility of hot water injection development in this block is systematically studied by numerical simulation,,The influence of oil deposit parameters and injection parameters on development effect is discussed.Combined with economic evaluation,optimal scheme of hot water flooding for test well group is formed.At the same time,The formulation selection of surfactant chemical flooding system and evaluation of oil displacement effect are carried out indoors,pass through the comprehensive test of oil-water interfacial tension,emulsifying capacity and displacement capacity,The formula of chemical flooding system suitable for the block of Shang 10-49 is screened out.And the use of water flooding history fitting at the end of the field parameters as the initial parameter field of chemical flooding,according to the test results and experience,using numerical simulation technology for analysis and comparison,respectively for the chemical agent injection mode,injection volume were optimized,the finalscheme suitable for the area of chemical flooding..Comprehensive comparison of the advantages and disadvantages of both,to further improve the mining effect of this block,and to lay the foundation for water flooding after conversion development mode,and provide the basis.