Based On The Bio-viscosity Reduction Technology Of The High Viscosity Zone Of The Badaowan Formation In The No. 18 Well Area

Heavy oil resource distribution in China is very wide,and most of the the heavy reservoir in shallow strata,the main reason cause the high viscosity of heavy oil is colloid and aspHaltene.At present,the economic and effective microbial oil recovery method for the sustainable development of construction of the well has important practical significance.According to the operation area of Sedimentary Facies of Badaowan Formation in Zhong 18Wells block in Fengcheng Reservoir the mining method is steam injection.From the point of view of the mining situation,the reservoir has good pHysical properties,large thickness of oil layer and low viscosity of crude oil,which has good production effect;The production efficiency of oil well with high viscosity of crude oil is not ideal,so it is urgent to improve,and microbial viscosity reduction technology can effectively solve the problem of super heavy oil production,which is difficult to be worked out.Therefore,this paper presents an effective use of microbial viscosity reduction technology for heavy eight well area of the oil reservoir of the 18 formation of the oil viscosity of the experiment and research,and achieved the following results:(1)by evaluation method of the above microorganisms reduced myxomycetes species,to carry out the test the degree of difficulty are taken into account at the same time,state change of heavy oil,acid production,viscosity reduction,drop surface tension necessary index as the main method for the evaluation of strain.(2)in Badaowan Formation in Zhong 18Wells block in Fengcheng Reservoir area of Badaowan group high viscosity of heavy oil sample as the bacteria source,consider factors proportion of carbon source,nitrogen source,pHospHorus source,to heavy oil samples as the sole carbon source for bacteria enrichment and acclimation of separation,and isolated three strains of drop of Myxomycetes species were named for QY-1,QY-2,QY-3 and of three strains were acid test the viscosity reduction rate corresponding to make coMParison,to determine the QY-1 degradation amplitude maximum.(3)on the QY-1,QY-2,QY-3 of temperature resistance,salt resistance performance test research,obtained by experiment a complex agent to the strains of a single heavy oil viscosity reduction rate has increased,reflects the mutual co metabolism of the relationship between strains.(4)through the core displacement experiment,QY-1,QY-2,QY-3 three strains have a strong enhanced oil recovery performance,can be a good way to improve the recovery of strains.And when residual oil saturation at a certain critical value,injecting more bacteria to bacteria in the longer time for crude oil degradation,improve the injection of microbial oil production better implementation method.(5)the field test conditions are designed,which provides reference for the field application.(6)the field test results and evaluation methods were designed,so as to effectively evaluate the effect of microbial on the spot.The in based on Badaowan Formation in Zhong 18Wells block group high viscosity biological drop test study on the technique of sticky,in the indoor experimental research based on,to carry out field pilot test,explore the new technology in a super heavy oil recovery,for the Windy City oil field operation area special super heavy oil recovery good technical reserves.