冀东高浅北稠油油藏整体调堵提高采收率室内实验
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国家自然科学基金项目“低渗/特低渗油藏片状纳米材料-微米自适应桥接颗粒协同控窜-调流-驱油理论研究”(项目编号 52174046)


Laboratory Experiment of Integral Profile Control and Water Shutoff for Enhanced Oil Recovery in Heavy Oil Reservoirs of Jidong Gaoqianbei Block
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    摘要:

    以注采单元为单位的整体调堵施工措施可进一步改善冀东高浅北稠油油藏多轮次调堵的控水增油效果, 为深入研究整体调堵改善注水开发效果的相关机理,借助室内动静态实验开展了泡沫、凝胶的配方体系优选,并 评价了体系的调驱和封堵性能。在室内建立了五点法注采井网三维物理模型,开展了泡沫驱和“泡沫+凝胶”整 体调堵提高采收率对比实验,评价不同措施的控水增油效果。实验结果表明,整体调堵提高采收率22.04%,比纯 泡沫驱多提高4.15%。“泡沫+凝胶”有效抑制高渗透层窜流,调整措施井吸水和产液剖面,后续水驱平面和纵向 波及范围扩大,有效改善了储层的平面及纵向非均质性。整体调堵施工后注采井网整体开发效果显著提升。

    Abstract:

    The overall profile control and water shutoff construction measures based on the injection-production unit can further improve the water control and oil increase effect of multiple rounds of heavy oil reservoirs in the Gaoqianbei block. In order to deeply study the relevant mechanism of overall profile control and water shutoff to improve the effect of water injection development,the indoor dynamic and static experimental evaluation was carried out to optimize the foam and gel formulation system,and the performance of control flooding and plugging was evaluated. A three-dimensional physical model of the five-point injection-production well pattern was established indoors,and a comparative experiment of foam flooding and "foam + gel" overall profile control and water shutoff to improve oil recovery was carried out to evaluate the water control and oil enhancement effects of different measures. The experimental results showed that the overall profile control and water shutoff increased oil recovery rate by 22.04%,which was 4.15% higher than that of pure foam flooding. "Foam + gel" could effectively suppress the channeling of high-permeability layers,and adjust the water absorption and liquid production profile of the well. The plane and longitudinal extent of subsequent water flooding was expanded,the heterogeneity of the reservoir had been effectively improved. The overall development effect of the injection-production well pattern had been significantly improved after the overall profile control and water shutoff construction.

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  • 在线发布日期: 2022-04-25
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