大庆油田ASP(碱、表面活性剂、聚合物)三元复合驱矿场试验实施过程中,原油采出液出现了严重乳化现象,且乳状液的运移规律及其对提高采收率影响程度不明确。因此,开展长岩心模型实验,明确了乳状液渗流及驱油机理。结果表明:按照实际三元复合体系配方注入,随着运移距离的增加,乳化能力不断减弱,0.40倍孔隙体积时产生乳化段塞,0.60倍孔隙体积时乳化结束,乳化段塞长度为0.20倍孔隙体积。驱油实验显示,最佳的驱油段塞尺寸为0.30倍孔隙体积,实际乳化段塞未达到最佳尺寸,需要延长三元复合体系注入。实验真实反应了地层条件下三元复合驱乳化过程,明确了乳化规律以及乳状液段塞对驱油效果影响程度,对现场段塞设计和调整具有重要的指导意义。
In the field experiment of ASP (alkali, surfactant, polymer) flooding in Daqing Oilfield, the produced liquid of crude oil was seriously emulsified, but the migration law of the produced emulsion and its effect on enhancing recovery efficiency are unclear. Therefore, the long core model experiment was conducted to clarify the mechanism of emulsion seepage and flooding. The results show that after injection based on the actual formula of ASP flooding system, the emulsifying capacity was continuously weakened with the increase of the migration distance, the emulsifying slug was produced when the pore volume was 0.40 time and ended when the pore volume was 0.60 time, and the length of the emulsifying slug was 0.20 time the pore volume. The results of flooding experiment show that the optimal displacement slug size was 0.30 time the pore volume, and the actual emulsifying slug did not reach the optimal size, so the injection time of ASP system should be extended. The experiment truly reflected the emulsification process of the ASP flooding under the formation conditions, and clarified the emulsification law and the influence of the emulsion slug on the flooding effect, with important guiding significance for on-site adjustment.
[1] 廖广志,王强,王红庄,等.化学驱开发现状与前景展望[J].石油学报,2017,38(2):196-207.
LIAO Guangzhi,WANG Qiang,WANG Hongzhuang,et al.Chemical flooding development status and prospect[J].Acta Petrolei Sinica,2017,38(2):196-207.
[2] 罗莉涛,廖广志,严文瀚,等.化学驱中聚合物水动力学尺寸及最优匹配注入研究[J].油田化学,2016,33(1):125-130.
LUO Litao,LIAO Guangzhi,YAN Wenhan,et al.Study on hydrodynamic size and optimal matching injection of polymer in the chemical flooding[J].Oilfield Chemistry,2016,33 (1):125-130.
[3] 朱洲,康万利,吴瑞坤,等.高盐条件下甜菜碱两亲聚合物乳状液体系的稳定性[J].石油化工高等学校学报,2017,30(6):32-36.
ZHU Zhou,KANG Wanli,WU Ruikun,et al.The stability of emulsion stabilized by betaine amphiphilic polymer under high salt condition[J].Journal of Petrochemical Universities,2017,30(6):32-36.
[4] 杨双春,张传盈,潘一,等.国内外三元复合驱各“元”驱油效果的研究进展[J].现代化工,2017, 37(1):34-38.
YANG Shuangchun,ZHANG Chuanying,PAN Yi,et al.Research advance in the oil-displacement effect of ASP flooding system[J].Modern Chemical Industry,2017,37(1):34-38.
[5] 吴晨宇,侯吉瑞,赵凤兰,等.三元复合体系启动水驱后剩余油微观机理[J].油气地质与采收率,2015,22(5):84-88.
WU Chenyu,HOU Jirui,ZHAO Fenglan,et al.Study on the microscopic mechanism of driving remaining oil by ASP compound system after water flooding [J].Petroleum Geology and Recovery Efficiency,2015,22(5):84-88.
[6] JIN J,ZHU Y Z,WANG D,et al.Recent progress in developing advanced membranes for emulsified oil/water separation[J].NPG Asia Materials,2014,6:1-11
[7] 赵玉集,罗莉涛,刘卫东,等.聚合物/表活剂二元体系在多孔介质中运移的黏度和界面张力变化[J].科技导报,2014,32(16):34-38.
ZHAO Yuji,LUO Litao,LIU Weidong,et al.Variations of viscosity and interfacial tension of polymer/surfactant binary flooding in porous media[J].Science & Technology Review,2014,32(16):34-38.
[8] 马云飞,赵凤兰,王潇,等.聚合物表面活性剂在超长填砂管中的动态性能评价[J].油田化学,2017,34(2):300-305.
MA Yunfei,ZHAO Fenglan,WANG Xiao, et al.Dynamic performance evaluation of polymer-surfactant at long sand-packed model[J].Oilfield Chemistry,2017,34(2):300-305.
[9] 安晨辉.30 m填砂管中复合驱油体系特性对驱油效率的影响[J].石油与天然气化工,2016,45(5):67-70.
AN Chenhui.Experiment research on the effect of ASP system property on oil displacement efficiency in 30 m sand filling tube[J].Chemical Engineering of Oil & Gas,2016,45(5):67-70.
[10] 杨红,余华贵,黄春霞,等.岩心尺度对三元复合体系渗流特性的影响[J].油田化学,2016,33(4):710-714.
YANG Hong,YU Huagui,HUANG Chunxia,et al.Effect of core size on the seepage characteristic of alkali/surfactant/polymer system[J].Oilfield Chemistry,2016,33(4):710-714.
[11] 陈思智,刘卫东,王桂君,等.乳状液体系在石油工业中研究现状综述[J].应用化工,2017, 46(7):1366-1369.
CHEN Sizhi, LIU Weidong,WANG Guijun,et al.Summary about application of emulsion system in petroleum industry[J].Applied Chemical Industry,2017,46(7):1366-1369.
[12] 史胜龙,汪庐山,靳彦欣,等.乳状液体系在驱油和调剖堵水中的应用进展[J].油田化学,2014, 31(1):141-145.
SHI Shenglong,WANG Lushan,JIN Yanxin,et al.Application progress and developmental tendency of emulsion system used in flooding, profile control and water plugging[J].Oilfield Chemistry,2014,31(1):141-145.
[13] 周亚洲,王德民,王志鹏,等.多孔介质中孔喉级别乳状液的形成条件及黏弹性[J]. 石油勘探与开发, 2017, 44(1):110-116.
ZHOU Yazhou,WANG Demin,WANG Zhipeng,et al.The formation and viscoelasticity of pore-throat scale emulsion in porous media[J].Petroleum Exploration and Development,2017,44(1):110-116.
[14] 徐金涛,岳湘安,宋伟新,等.乳状液在储层中的注入性研究[J].日用化学工业,2015, 45(1):28-31.
XU Jintao,YUE Xiang'an,SONG Weixin,et al.Study on injection of emulsions in reservoir bed[J].China Surfactant Detergent ＆ Cosmetics,2015,45(1):28-31.
[15] 李世军,杨振宇,宋考平,等.三元复合驱中乳化作用对提高采收率的影响[J].石油学报,2003,24(5):71-73.
LI Shijun,YANG Zhenyu,SONG Kaoping,et al.Effect of crude oil emulsion on enhanced oil recovery in alkaline surfactant polymer flooding[J].Acta Petrolei Sinica,2003,24(5):71-73.
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