低渗透油田用CO_2气溶性泡沫体系研发及性能评价
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摘要
利用可视化高温高压泡沫仪筛选出具有良好CO_2泡沫性能的表面活性剂,在醇类等共溶剂的辅助下,评价其在超临界CO_2中的溶解性能;利用高温高压岩心驱替实验装置,评价CO_2气溶性泡沫体系提高采收率的能力。结果表明,所筛选的非离子型表面活性剂N-P-12在125℃高温条件下可以产生具有一定稳定性的CO_2泡沫,醇类等共溶剂的加入可以明显提高其在超临界CO_2中的溶解度。CO_2气溶性泡沫体系驱油过程中阻力因子呈先增大后减小的趋势,生成的泡沫对体系流动起到流度控制的作用,且较常规CO_2泡沫能够显著提高原油采收率,最终采收率高达92.50%。
The surfactants with good CO_2 foam performance were screened out by high-pressure and high-temperature visualized foam device. The solubility of the systems in supercritical CO_2 were evaluated by using alcohols as co-solvents. The ability of EOR of CO_2-soluble surfactant foam was tested by high-temperature and high-pressure core displacement experimental device. The results show that the selected nonionic surfactants N-P-12 have good CO_2 foam stability at high-temperature condition of 125 ℃,and the addition of alcohol as co-solvents could significantly increase the solubility of the surfactants in the CO_2. During the CO_2 foam flooding,the resistance factor may increase first and then decrease,and the generated foam may play the role of mobility control in the system. Moreover,CO_2 foam based on CO_2-soluble surfactant is more efficient on enhancing oil recovery than the conventional CO_2 foam,and the ultimate oil recovery is raised up to 92.50%.
The surfactants with good CO_2 foam performance were screened out by high-pressure and high-temperature visualized foam device. The solubility of the systems in supercritical CO_2 were evaluated by using alcohols as co-solvents. The ability of EOR of CO_2-soluble surfactant foam was tested by high-temperature and high-pressure core displacement experimental device. The results show that the selected nonionic surfactants N-P-12 have good CO_2 foam stability at high-temperature condition of 125 ℃,and the addition of alcohol as co-solvents could significantly increase the solubility of the surfactants in the CO_2. During the CO_2 foam flooding,the resistance factor may increase first and then decrease,and the generated foam may play the role of mobility control in the system. Moreover,CO_2 foam based on CO_2-soluble surfactant is more efficient on enhancing oil recovery than the conventional CO_2 foam,and the ultimate oil recovery is raised up to 92.50%.
引文
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[21]袁士义,刘尚奇,张义堂,等.热水添加氮气泡沫驱提高稠油采收率研究[J].石油学报,2004,25(1):57-61.YUAN Shiyi,LIU Shangqi,ZHANG Yitang,et al.Enhancing heavy oil recovery with hot water flooding by adding nitrogen and surfactant[J].Acta Petrolei Sinica,2004,25(1):57-61.
[22] LIU J,SHERVANI Z,RAVEENDRAN P,et al.Micellization of sodium bis(2-ethylhexyl)sulfosuccinate in supercritical CO2with fluorinated co-surfactant and its solubilization of hydrophilic species[J].Journal of Supercritical Fluids,2005,33(2):121-130.
[2]王福顺,牟珍宝,刘鹏程,等.超稠油油藏CO2辅助开采作用机理实验与数值模拟研究[J].油气地质与采收率,2017,24(6):86-91.WANG Fushun,MOU Zhenbao,LIU Pengcheng,et al.Experiment and numerical simulation on mechanism of CO2assisted mining in super heavy oil reservoirs[J].Petroleum Geology and Recovery Efficiency,2017,24(6):86-91.
[3]王雅春,赵振铎.压力对二氧化碳驱油效果影响的实验研究[J].特种油气藏,2017,24(4):132-135.WANG Yachun,ZHAO Zhenduo.Experimental research on the ef-fect of pressure on CO2oil displacement efficiency[J].Special Oil&Gas Reservoirs,2017,24(4):132-135.
[4] MATHEW E S,SHAIK A R,AL SUMAITI A,et al.Effect of oil presence on CO2foam based mobility control in high temperature high salinity carbonate reservoirs[J].Energy&Fuels,2018,32(3):2 983-2 992.
[5]赵永攀,赵习森,李剑,等.特低渗透油藏CO2驱油室内实验与矿场应用[J].大庆石油地质与开发,2018,37(1):128-133.ZHAO Yongpan,ZHAO Xisen,LI Jian,et al.Indoor experiment and field application of CO2flooding in ultra-low permeability oil reservoirs[J].Petroleum Geology&Oilfield Development in Daqing,2018,37(1):128-133.
[6] XUE Z,PANTHI K,FEI Y,et al.CO2-soluble ionic surfactants and CO2foams for high-temperature and high-salinity sandstone reservoirs[J].Energy&Fuels,2015,29(9):5 750-5 760.
[7] XING D,WEI B,TRICKETT K,et al.CO2-soluble surfactants for improved mobility control[R].SPE 129907,2010.
[8] OTA M,HASHIMOTO Y,SATO M,et al.Solubility of flavone,6-methoxyflavone and anthracene in supercritical CO2with/without a co-solvent of ethanol correlated by using a newly proposed entropy-based solubility parameter[J].Fluid Phase Equilibria,2016,425:65-71.
[9] SUN L,PU W,XIN J,et al.High temperature and oil tolerance of surfactant foam/polymer-surfactant foam[J].Rsc Advances,2015,5(30):23 410-23 418.
[10] EMADI A,JAMIOLAHMADY M,SOHRABI M,et al.Visualization of oil recovery by CO2-foam injection;Effect of oil viscosity and gas type[R].SPE 152996,2012.
[11]宋鹤,章杨,陈百炼,等.高温高矿化度CO2泡沫性能实验研究[J].油田化学,2013,30(3):380-383.SONG He,ZHANG Yang,CHEN Bailian,et al.Experimental study on performance of CO2foam at high temperature and high salinity conditions[J].Oilfield Chemistry,2013,30(3):380-383.
[12]刘德生,陈小榆,周承富.温度对泡沫稳定性的影响[J].钻井液与完井液,2006,23(4):10-12.LIU Desheng,CHEN Xiaoyu,ZHOU Chengfu.Effects of temperature on the stability of foam[J].Drilling Fluid&Completion Fluid,2006,23(4):10-12.
[13] WANG H,GUO W,ZHENG C,et al.Effect of temperature on foaming ability and foam stability of typical surfactants used for foaming agent[J].Journal of Surfactants and Detergents,2017,20(3):615-622.
[14]章杨,张亮,陈百炼,等.高温高压CO2泡沫性能评价及实验方法研究[J].高校化学工程学报,2014,28(3):535-541.ZHANG Yang,ZHANG Liang,CHEN Bailian,et al.Evaluation and experimental study on CO2foams at high pressure and temperature[J].Journal of Chemical Engineering of Chinese Universities,2014,28(3):535-541.
[15] ENICK R M,BECKMAN E J,JOHNSON J K.Synthesis and evaluation of CO2thickeners designed with molecular modeling[R].Pittsburgh:United States Department of Energy’s National Energy Technology Laboratory,2010.
[16] CONSANI K A,SMITH R D.Observations on the solubility of surfactants and related molecules in carbon dioxide at 50℃[J].Journal of Supercritical Fluids,1990,3(2):51-65.
[17] LI J L,JIN J S,ZHANG Z T,et al.Measurement and correlation of solubility of benzamide in supercritical carbon dioxide with and without cosolvent[J].Fluid Phase Equilibria,2011,307(1):11-15.
[18] LIU J,HAN B,LI G,et al.Solubility of the non-ionic surfactant tetraethylene glycol n-laurel ether in supercritical CO2with npentanol[J].Fluid Phase Equilibria,2001,187(4):247-254.
[19] KOPCAK U,MOHAMED R S.Caffeine solubility in supercritical carbon dioxide/co-solvent mixtures[J].Journal of Supercritical Fluids,2005,34(2):209-214.
[20]胡伟,吕成远,王锐,等.水驱油藏注CO2非混相驱油机理及剩余油分布特征[J].油气地质与采收率,2017,24(5):99-105.HU Wei,LüChengyuan,WANG Rui,et al.Mechanism of CO2immiscible flooding and distribution of remaining oil in water drive oil reservoir[J].Petroleum Geology and Recovery Efficiency,2017,24(5):99-105.
[21]袁士义,刘尚奇,张义堂,等.热水添加氮气泡沫驱提高稠油采收率研究[J].石油学报,2004,25(1):57-61.YUAN Shiyi,LIU Shangqi,ZHANG Yitang,et al.Enhancing heavy oil recovery with hot water flooding by adding nitrogen and surfactant[J].Acta Petrolei Sinica,2004,25(1):57-61.
[22] LIU J,SHERVANI Z,RAVEENDRAN P,et al.Micellization of sodium bis(2-ethylhexyl)sulfosuccinate in supercritical CO2with fluorinated co-surfactant and its solubilization of hydrophilic species[J].Journal of Supercritical Fluids,2005,33(2):121-130.