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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1.中国石油大学北京非常规油气科学技术研究院;2.中国石油冀东油田分公司钻采工艺研究院;3.大港油田石油工程研究院压裂酸化技术服务中心

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国家十三五重大专项“低渗-致密油藏高效提高采收率新技术”,项目编号:2017ZX05009-004


Laboratory experiment of integral profile control and water shutoff for enhanced oil recovery in heavy oil reservoirs in Jidong Gaoqianbei Block
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China University of Petroleum Beijing Unconventional Oil and Gas Science and Technology Research Institute

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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,本文借助室内动静态实验评价,开展了泡沫、凝胶的配方体系优选,并评价了调驱和封堵性能。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 eastern Hebei. In order to deeply study the relevant mechanism of overall profile control and water shutoff to improve the effect of water injection development, this paper uses indoor dynamic and static experimental evaluation to carry out the optimization of foam and gel formulation system, and evaluates the performance of control flooding and plugging. 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" integral 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 show that the overall profile control and water shutoff increase the recovery rate by 22.04%, which is 4.15% higher than that of pure foam flooding. "Foam + gel" effectively suppresses the channeling of high-permeability layers, and adjusts the water absorption and liquid production profile of the well. The plane and longitudinal extent of subsequent water flooding was expanded. The planar and longitudinal heterogeneity of the reservoir has been effectively improved, and the overall development effect of the injection-production well pattern has been significantly improved after the overall profile control and water shutoff construction.

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  • 收稿日期:2021-01-05
  • 最后修改日期:2021-04-01
  • 录用日期:2021-04-19
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