扩大波及体积与流度控制组合技术研究与应用
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摘要
针对渤海S稠油油田在开发中存在的含水上升快、水驱采出程度低、油水界面亲和力低的矛盾,进行了水驱稠油调剖调驱一体化组合技术研究。在储层大孔道封堵的基础上,对剖面调整体系进行了系统筛选,对强化水驱体系乳化性、降黏率、界面张力及驱替效率作了系统评价。结果表明,强化水驱体系在较低浓度下可以实现较好的稠油降黏功效,降黏率达90%以上,油水界面张力可下降至10~(-2) mN/m;在室内非均质岩心的条件下,强化水驱体系低浓度条件下即可提高采收率9.3%,配合调剖措施的情冴下可提高采收率27.2%,具有"1+1>2"的驱油功效。基于"储层大孔道封堵与冷采驱油"的"调+驱相结合"的技术思路,进行了组合调驱工艺方案设计幵完成了现场有效实施,实施后一线受益井见效比例达66.7%,综合含水下降5%～7%,目前阶段净增油10 500 m~3,且持续有效。该组合调驱一体化工艺,施工工艺成熟,矿场试验增油效果显著,便于在海上油田大面积推广应用。
In view of the problems in the development of Bohai S heavy oilfield, such as fast watercut rising rate, low water flooding degree and the low affinity of oil and water interface, research on the integrated combination technology of profile control and flooding was carried out. In this paper, the profile adjustment systems were screened.the emulsification, viscosity reduction rate, interfacial tension, displacement efficiency of strengthened water flooding system were systematically evaluated. The result shows that, micro interface dispersion displacement system in low concentration can play a good effect of viscosity reduction of heavy oil, the viscosity reduction rate can be more than90%; oil-water interfacial tension can be dropped to 10~(-2) mN/m; under the condition of heterogeneous core, the strengthened water flooding system can improve the recovery rate of 9.3% in low concentration, and the recovery rate can be increased by 27.2% with the combination of profile control measures. Based on the technical thought of "combination of the main channel blocking and strengthened water flooding system drive oil", we completed S oilfield B15 well group project design, after adopting the combination technical measures of "profile control + strengthened water flooding system displacement", the effective rate of the producing well was 66.7%, good precipitation was achieved and oil production was increased by 10 500 m~3.
In view of the problems in the development of Bohai S heavy oilfield, such as fast watercut rising rate, low water flooding degree and the low affinity of oil and water interface, research on the integrated combination technology of profile control and flooding was carried out. In this paper, the profile adjustment systems were screened.the emulsification, viscosity reduction rate, interfacial tension, displacement efficiency of strengthened water flooding system were systematically evaluated. The result shows that, micro interface dispersion displacement system in low concentration can play a good effect of viscosity reduction of heavy oil, the viscosity reduction rate can be more than90%; oil-water interfacial tension can be dropped to 10~(-2) mN/m; under the condition of heterogeneous core, the strengthened water flooding system can improve the recovery rate of 9.3% in low concentration, and the recovery rate can be increased by 27.2% with the combination of profile control measures. Based on the technical thought of "combination of the main channel blocking and strengthened water flooding system drive oil", we completed S oilfield B15 well group project design, after adopting the combination technical measures of "profile control + strengthened water flooding system displacement", the effective rate of the producing well was 66.7%, good precipitation was achieved and oil production was increased by 10 500 m~3.
引文
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[2]宋社民,王亚洲,周俊,等.早期可动凝胶调驱注水开发普通稠油油藏[J].石油勘探与开发,2007,34(5):585-590.
[3]孟科全,唐晓东,邹雯炆,等.稠油降黏技术研究进展[J].天然气与石油,2009,27(3):30-34.
[4]尉小明,郭学军.辽河油田超稠油水基降黏剂的研制[J].精细石油化工进展,2005,6(10):12-14..
[5]尉小明,郑猛,白永林.稠油掺表面活性剂水溶液降黏机理研究[J].特种油气藏,2004,11(4):92-94.
[6]韩建民.墓于菱形模型的调剖剂用t预测算法的研究与实现[J].微计算机应用,2002,29(6):164.
[7]王丼.高含水油藏注水井调剖选井方法研究[J].中外能源,2014,19(10):47-51.
[8]张云宝,王楠,夏欢,等.强化分散体系乳化降黏性能评价及机理分析[J].石油化工高等学校学报,2016,29(6):18-22.
[9]孟科全,陈维余,张艳辉,等.渤海油田窄河道型油藏深部液流转向体系研究与应用[J].石油化工应用,2016,35(12):14-17.
[10]曹伟佳,徐鹏.强化分散体系提高采收率影响因素研究[J].当代化工,2016,45(08):1756-1757+1760.