聚驱后油藏井网调整与深部调剖三维物理模拟实验

发布时间：2018-03-09 16:55

本文选题：井网调整　切入点：聚合物微球　出处：《断块油气田》2017年03期 　论文类型：期刊论文

【摘要】：针对聚合物驱后油藏剩余油分布特点,提出了井网调整与深部调驱相结合的提高采收率方法。孤岛油田中一区Ng3注聚区为模型原型,以相似准则为理论基础,设计并制作了平面非均质三维物理模型;研制了具有自组装特性的聚合物微球,优选出由BS与AES复配而成适用于目标油藏的乳化剂体系;原始一注四采五点法井网注聚后采收率为34.1%,在进行驱替试验的同时,采用电阻率法测量了模型中含水饱和度分布;调整原始井网,对非均质油藏模型分别注入聚合物溶液和聚合物微球与乳化剂复合体系深部调驱2组实验。结果表明,2个方案均可以提高聚驱后油藏采收率,单一聚合物溶液提高6百分点,而聚合物微球与乳化剂复合体系可提高采收率16百分点。分析各驱替阶段剩余油分布情况,聚合物微球与乳化剂复合体系能够封堵高渗层,使后续驱替液转向进入两侧低渗区域。
[Abstract]:According to the distribution characteristics of remaining oil in reservoir after polymer flooding, a method of improving oil recovery is put forward by combining well pattern adjustment and deep modulation flooding. The Ng3 polymer injection area in Gudao Oilfield is the model prototype and based on the similarity criterion. The three-dimensional physical model of planar heterogeneity was designed and made, the polymer microspheres with self-assembly characteristics were developed, and the emulsifier system suitable for the target reservoir was selected by combining BS with AES. The recovery factor of the original one injection and four production five-point well pattern is 34.11.When the displacement test is carried out, the distribution of water saturation in the model is measured by the resistivity method, and the original well pattern is adjusted. The experiments of injection of polymer solution and polymer microsphere / emulsifier compound system into heterogeneous reservoir model show that both schemes can increase oil recovery and single polymer solution by 6%. The oil recovery can be increased by 16 percentage points by the composite system of polymer microsphere and emulsifier, and the distribution of remaining oil in each displacement stage is analyzed. The composite system of polymer microsphere and emulsifier can block the highly permeable layer. The subsequent displacement fluid is diverted into the low permeability area on both sides.
【作者单位】：中国石油大学(北京)石油工程教育部重点实验室;
【基金】：国家科技重大专项课题“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(2016ZX05050-012) 国家自然科学基金项目“致密油储层提高采收率关键理论与方法研究”(51334007)
【分类号】：TE357

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