Research And Application Of Ba 38 Fault Block Weak Gel Microbes ASP Flooding

According to huabei oilfield in the accumulation of existing technology to improve oil recovery filtrated could apply to ba 38 fault block technical methods.According to huabei oilfield Previous experience in Weak gel and meor technologies,and microbial flooding progress test successful experience of ba 38 fault block,combined Geology with development situation of ba 38 fault block,Analyzed the weak gel and microbial complex flooding the feasibility of the technology,Researched the applicability of ba 19 fault block Weak gel water formulation and microorganism strains, obtained the effective formula of weak gel(weak gel injected back water and water 1:1 scale mixed)and microbial strains and blends with formula.Through experimental confirmed weak gel flooding style"lead slug + lord slug + protection slug",microbial flooding style"former nutrient slug + nutrient bacteria liquid slug + after nutrient slug";put forward the method how to select best time of microbial complement nutrient:Considering multi-gas volume and the bacterium liquid concentration of liquid oil output.Designed Construction schemes and monitoring program of the weak gel microbial complex flooding.According to monitoring results,In conditions of injection water remained stable,injection water pressure droped by 14.6Mpa descend to 14.1Mpa;day producing liquid by 421t rise to 450t,day producing oil by 109t rise to 125t,water cut the rate by 16.6% down to 1.63%; the maintenance measures workload of oil Wells decreased,weak gel microbial complex flooding technology in the implementation of the ba 38 fault block has received some success.