空气辅助内源混合菌吞吐技术
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摘要
内源混合兼性厌氧菌对油藏温压系统及地层流体的适应性强,但无氧条件下该类菌种生长慢,且与原油作用不明显、增油效果差。为了解决这一问题,提出了空气辅助内源混合菌吞吐技术。利用正交实验考察了不同条件对内源混合菌生长特性;同时通过动/静态实验,系统研究了空气辅助下内源混合菌的作用和吞吐效果,并应用于矿场单井吞吐。结果表明:空气辅助作用下效果更明显,可进一步降低20.29%的界面张力和6.69%的降黏率;原油中含蜡/胶质量也大幅度降低69.06%、9.09%,改善了原油流动性能;吞吐效果较地层水、空气、内源混合菌平均提高了3.54%～10.78%;矿场应用效果显著,平均日产油量提高3.32 t,含水率下降了近22百分点,投入产出比高达1.00∶2.07～1.00∶3.62,且产出液中的平均混合菌浓度和有机质含量也明显增多。该研究成果对高效开发原油具有一定借鉴意义和理论价值。
Indigenous-blended facultative anaerobic microorganisms(IFAM) have strong adaptability to the systems of the oil reservoir temperature and pressure and moreover the formation fluids, but under the anaerobic conditions, the growth of the IFAM is slow and furthermore their actions with the crude oil are not obvious, the oil incremental effect is rather poor. In order to solve the problems, the technique of air-assisted IFAM huff-and puff was proposed. The orthogonal experiment was adopted to investigate the growth characteristics of the IFAM under different conditions; with the help of the dynamic/static experiments, the action and effect of the air-assisted IFAM were systematically studied, and moreover the technique was applied in the individual well. The results show that the effects are more obvious under the air-assisted action, i.e. can further reduce the interfacial tension by 20.29% and the viscosity reduction rate by 6.69%; the wax/gel mass of crude oil is also greatly reduced by 69.06% and 9.09%, thus the flowability of the crude oil can be improved; the huff-and-puff effect was enhanced by 3.54%-10.78% compared with those of the formation water, air and IFAM; the effects of the field application were remarkable, the average daily oil production was increased by 3.32 t, the water cut was reduced by nearly 22%, the input-output ratio was as high as 1.00∶2.07-1.00∶3.62, the average mixed bacteria concentration and organic matter content in the produced liquid were also enhanced obviously. This research results possess a certain references and theoretical value for the high-efficiency development of the crude oil.
Indigenous-blended facultative anaerobic microorganisms(IFAM) have strong adaptability to the systems of the oil reservoir temperature and pressure and moreover the formation fluids, but under the anaerobic conditions, the growth of the IFAM is slow and furthermore their actions with the crude oil are not obvious, the oil incremental effect is rather poor. In order to solve the problems, the technique of air-assisted IFAM huff-and puff was proposed. The orthogonal experiment was adopted to investigate the growth characteristics of the IFAM under different conditions; with the help of the dynamic/static experiments, the action and effect of the air-assisted IFAM were systematically studied, and moreover the technique was applied in the individual well. The results show that the effects are more obvious under the air-assisted action, i.e. can further reduce the interfacial tension by 20.29% and the viscosity reduction rate by 6.69%; the wax/gel mass of crude oil is also greatly reduced by 69.06% and 9.09%, thus the flowability of the crude oil can be improved; the huff-and-puff effect was enhanced by 3.54%-10.78% compared with those of the formation water, air and IFAM; the effects of the field application were remarkable, the average daily oil production was increased by 3.32 t, the water cut was reduced by nearly 22%, the input-output ratio was as high as 1.00∶2.07-1.00∶3.62, the average mixed bacteria concentration and organic matter content in the produced liquid were also enhanced obviously. This research results possess a certain references and theoretical value for the high-efficiency development of the crude oil.
引文
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[3]雷光伦.微生物采油技术的研究与应用[J].石油学报,2001,22(2):56-61.LEI Guanglun.The research and application of microbial enhanced oil recovery[J].Acta Petrolei Sinica,2001,22(2):56-61.
[4]吴亚嫚,谷峻,谭燕,等.油井采出液中微生物群落结构的T-RFLP分析[J].土壤学报,2009,46(5):878-886.WU Yaman,GU Jun,TAN Yan,et al.Microbial community structure in production water from a daqing petroleum reservoir[J].Acta Pedologica Sinica,2009,46(5):878-886.
[5]ELIZAVETA A B,OSMOLOVSKAYA M L,MITOSH A V et al.Radioisotopic culture based and oil go-nucleotide microchip analyses of thermophilic microbial communities in a continental high temperature petroleum reservoir[J].Envir Microbiol,2009,69(10):6143-6151.
[6]申坤,李斌,黄战卫,等.复合本源微生物驱油技术在低渗透油藏的应用研究[J].西安石油大学学报(自然科学版),2013,28(3):63-71.SHEN Kun,LI Bin,HUANG Zhanwei,et al.Application of composite indigenous microorganism oil displacement technology in low-permeability reservoirs[J].Journal of Xi’an Shiyou University(Natural Science Edition),2013,28(3):63-71.
[7]KHOPADE A,BIAO R,LIU X,et al.Production and stability studies of the biosurfactant isolated from marine Nocardiopsis sp.B4[J].Desalination,2012,285:198-204.
[8]向廷生,王莉,张敏.油藏微生物及其在石油工业中的应用[J].生物技术,2015,15(4):87-91.XIANG Yansheng,WANG Li,ZHANG Min.Reservoir microorganisms and their application in petroleum industry[J].Biotechnology,2015,15(4):87-91.
[9]张新春,杨兴利,师晓伟.“三低” 油藏空气泡沫驱低温氧化可行性研究:以甘谷驿油田唐80区块为例[J].岩性油气藏,2013,25(2):86-91.ZHANG Xinchun,YANG Xingli,SHI Xiaowei.Feasibility study of air foam flooding low temperature oxidation process in“three low”reservoir:A case study from Tang 80 Block in Ganguyi Oilfield[J].Lithologic Reservoirs,2013,25(2):86-91.
[10]翟亚梅,严玉圃,万永清,等.吐玉克油田深层稠油天然气吞吐技术研究与应用[J].岩性油气藏,2012,24(4):111-114.ZHAI Yamei,YAN Yupu,WAN Yongqing,et al.Research and application of gas huff and puff of deep heavy oil in the Tuyuke Oilfield[J].Lithologic Reservoirs,2012,24(4):111-114.
[11]李友全,韩秀虹,阎燕,等.低渗透油藏CO2吞吐压力响应曲线分析[J].岩性油气藏,2017,29(6):119-127.LI Youquan,HAN Xiuhong,YAN Yan,et al.Pressure transient analysis on CO2 huff and puff in low permeability reservoir[J].Lithologic Reservoirs,2017,29(6):119-127.
[12]雷光伦,程明明,袁勇君,等.微生物与空气协同驱油的耗氧规律[J].油气地质与采收率,2016,23(3):67-81.LEI Guanglun,CHENG Mingming,YUAN Yongjun,et al.Study on the law of oxygen consumption by microbe during air flooding[J].Petroleum Geology and Recovery Efficiency,2016,23(3):67-81.
[13]陈星宏,王磊,刘彩青,等.微生物驱油复合菌性能评价及其应用[J].大庆石油地质与开发,2016,35(2):92-96.CHEN Xinghong,WANG Lei,LIU Caiqing,et al.Performance evaluation and application of the MEOR complex bacteria[J].Petroleum Geology & Oilfield Development in Daqing,2016,35(2):92-96.
[14]李士伦,张正卿,冉新权,等.注气提高石油采收率技术[M].成都:四川科学技术出版社,2010.LI Shilun,ZHANG Zhengqing,RAN Xinquan,et al.EOR technology by gas injection[M].Chengdu:Sichuan Science and Technology Press,2010.