摘要
针对渤海KL油田A20井组平面注水突进、纵向吸水不均及常规调剖体系难以注入等问题,开展了层内自生低界面张力泡沫调驱性能评价实验。采用界面流变仪、泡沫扫描仪和泡沫调驱动静态评价装置等设备,筛选优化了层内自生低界面张力泡沫体系的组成药剂及最佳复配浓度比,并采用多功能物理模拟驱替装置考察了该体系的动态调驱性能。结果表明:优选组成药剂及配比为10%生气药剂A+10%生气药剂B+2%释气药剂C+0.5%起泡剂PA-5+0.3%稳泡剂PJ(质量浓度),该复配体系可在可视化填砂管中稳定生泡;一维填砂管驱油效率可在水驱的基础上提高19.1%;非均质填砂管并联驱油时,注入复配体系可进一步驱洗高渗填砂管残余油并有效封堵高渗通道,扩大低渗填砂管的波及系数,分液率从0增至34%。从矿场实践来看,A20井组实施层内自生低界面张力泡沫调驱作业后,生产曲线呈含水下降、产油上升的形态,3个月内累计增油2007.29 m3,初步说明层内自生低界面张力泡沫调驱技术在海上油田具有广阔的推广应用前景。
Aiming to the problems such as plane flooding,uneven longitudinal water absorption and the difficulty of injection in conventional profile control system of A20 well group in KL oilfield of Bohai,the evaluation experiment of in-layer self-generated low interfacial tension foam flooding control performance was carried out.In this study,the interfacial rheometer,the foam scanner and the static evaluation device of the foam regulating drive were used to screen and optimize the composition agents and the optimal mixture concentration ratio of the self-generated low interfacial tension foam system.The dynamic regulating and flooding performance of the system was investigated by a multifunctional physical simulation displacement device.Results showed that the optimized composition and the ratio of 10%gas agent A+10%gas agent B+2%gas release agent C+0.5%surfactant PA-5+0.3%polymer PJ(mass concentration).The composite system could stabilize the bubble formation in the visualized sand filled tube.The oil displacement efficiency of one-dimensional sand filled pipe could be increased by 19.1%on the basis of water flooding.In the case of parallel displacement of heterogeneous sand fill pipes,the injection complex system could further wash the residual oil of high permeability sand fill pipes and effectively block the high permeability channel,expand the sweep coefficient of low permeability sand fill pipes,and increase the fraction of liquid from 0 to 34%.From the field practice,the production curve of A20 well group showed a decrease in water cut and an increase in oil production after the implementation of self-generated low interfacial tension foam flooding operation,with a cumulative oil increase of 2007.29 m3 within 3 months.It preliminarily proved that the technique of self-generated low interfacial tension foam flooding had broad application prospect in this kind of reservoir.
作者
刘翰林
郑继龙
吴彬彬
赵军
LIU Hanlin;ZHENG Jilong;WU Binbin;ZHAO Jun(China National Offshore Oil Corporation,Beijing 100010,China;Clean Energy Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China;Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)
出处
《精细石油化工进展》
CAS
2024年第5期8-14,共7页
Advances in Fine Petrochemicals
关键词
渤海油田
层内自生泡沫体系
低界面张力
调驱性能
油田化学品
Bohai oilfield
in situ foam system
low interfacial tension
profile control and flooding performance
oilfield chemicals
