春风油田特稠油油藏微生物吞吐技术研究及应用
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摘要
排6南位于春风油田西南部,为浅层特稠油油藏,油藏温度下脱气原油粘度19683mPa·s,油层厚度4～10m。CFP6-P44井地层温度29℃脱气原油粘度为25440mPa·s,含水100%。针对其原油粘度高、含水高,热采效率低等开发矛盾,采取内外源复合吞吐工艺,乳化分散降低原油粘度,改善油水流度比,提高油井产量。室内通过激活剂配方的优化和高效降粘细菌的筛选获得4号激活剂配方和三株外源嗜烃菌1-2-1、1-2-2、3-2-1,将内外源复合进行性能评价,乳化指数达到100%,降粘率达到97%。在P6-P44实施内外源微生物单井吞吐,含水最低降至79. 6%,日产油最高4. 1t,累计增油171t,投入产出比大于1∶5,具有良好的应用前景。
Pai 6 South is located in the southwest of Chunfeng oilfield. It is a shallow super heavy oil reservoir. The viscosity of degassed crude oil at reservoir temperature is 19683 mPa s and the thickness of reservoir is 4 ～ 10 M. The formation temperature of CFP6-P44 well is 29 DEG. The viscosity of degassing crude oil is 25440 mPa. s and water cut is 100%. Aiming at the development contradiction of high viscosity,high water cut and low thermal recovery efficiency of crude oil,the internal and external compound huff and puff technology was adopted to reduce the viscosity of crude oil by emulsifying and dispersing,improve the oil-water flow ratio and increase the production of oil wells. No. 4 activator formula and three exogenous hydrocarbon-philic bacteria 1-2-1,1-2-2,3-2-1 were obtained through optimization of activator formula and screening of high-efficiency viscosity-reducing bacteria in laboratory. The emulsifying index and viscosity-reducing rate were 100% and 97%respectively. In P6-P44,the lowest water cut is 79. 6%,the highest daily oil production is 4. 1 t,the cumulative oil increment is 171 t,and the input-output ratio is greater than 1: 5. It has a good application prospect.
Pai 6 South is located in the southwest of Chunfeng oilfield. It is a shallow super heavy oil reservoir. The viscosity of degassed crude oil at reservoir temperature is 19683 mPa s and the thickness of reservoir is 4 ～ 10 M. The formation temperature of CFP6-P44 well is 29 DEG. The viscosity of degassing crude oil is 25440 mPa. s and water cut is 100%. Aiming at the development contradiction of high viscosity,high water cut and low thermal recovery efficiency of crude oil,the internal and external compound huff and puff technology was adopted to reduce the viscosity of crude oil by emulsifying and dispersing,improve the oil-water flow ratio and increase the production of oil wells. No. 4 activator formula and three exogenous hydrocarbon-philic bacteria 1-2-1,1-2-2,3-2-1 were obtained through optimization of activator formula and screening of high-efficiency viscosity-reducing bacteria in laboratory. The emulsifying index and viscosity-reducing rate were 100% and 97%respectively. In P6-P44,the lowest water cut is 79. 6%,the highest daily oil production is 4. 1 t,the cumulative oil increment is 171 t,and the input-output ratio is greater than 1: 5. It has a good application prospect.
引文
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[4]宋永亭,胡婧,吴晓玲,等.室温条件下油藏采出液微生物群落结构稳定性[J].应用与环境生物学报,2017,23(3):495-501.
[5]包木太,袁书文,宋智勇,等.不同碳源激活剂对胜利油田中一区油藏内源菌激活效果评价[J].化工学报,2011,62(3):786-791.
[6]高配科,马挺,赵玲侠,等.胜利油田沾3区块内源微生物激活剂的筛选、优化及效果评价[J].化工学报,2011,62(7):2005-2012.
[7]张卉,郝国良,徐俊斌.生物表面活性剂产生菌的筛选及培养条件优化[J].沈阳师范大学学报:自然科学版.2011,29(2):293-296.
[8]Seghal K G,Anto T T,Joseph S B,et al.Optimization and characterization of a new lipopeptide biosurfactant produced by marine Brevibacterium aureum MSA13 in solid state culture[J].Bioresource Technology.2010,101(7):89-96.
[9]Tomasz J,Marcin L,Tomas R,et al.Isolation and characterization of two new lipopeptide iosurfactants produced by Pseudomonas fluorescens BD5 isolated from water from the Arctic Archipelago of Svalbard[J].Bioresource Technology,2010,101(15):18-23.
[10]Stefan I,Wu Yongfu,Patrick S,et al.New surfactant classes for enhanced oil recovery and their tertiary oil recovery potential[J].Journal of Petroleum Science and Engineering.2010,71(1-2):23-29.
[11]郝瑞霞,鲁安怀,王关玉.枯草芽孢杆菌对原油作用的初探[J].石油学报:石油加工,2002,18(5):15-20.
[12]余焱,张志坚,宋柏函.一株高效生物表面活性剂产生菌的分离、鉴定及培养条件的优化[J].复旦学报:自然科学版,2012,51(4):501-506.