疏松砂岩储层深部调剖堵剂分布模式研究

项目名称： 疏松砂岩储层深部调剖堵剂分布模式研究

项目编号： No.51504223

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 王硕亮

作者单位： 中国地质大学（北京）

项目金额： 20万元

中文摘要： 深部调剖过程中施工参数优化过多依靠人为经验，存在诸多不合理性，究其原因，没有定量描述注入压力与堵剂进入储层后分布模式之间的内在关系。本研究以聚合物冻胶类堵剂为例，利用平面非均质胶结模型和多层径向非均质模型，结合堵剂在模型中成胶前与成胶后的检测方法，进行堵剂平面分布规律和纵向分布规律的研究，探索堵剂在窜流型储层复杂流速压力分布条件下的成胶特性和各组分的色谱分离规律，分析堵剂动态成胶、各组分差异渗流对堵剂分布模式的影响。建立不同驱替速度堵剂相对渗透率曲线和成胶时间的计算方法，对UTCHEM组分数值模拟器进行修正，利用修正的组分数值模拟器开展实验结果的历史拟合，并扩展物理模拟参数变化范围，计算不同条件下的堵剂进入窜流区域与非窜流区域的体积，建立堵剂进入窜流区域与非窜流区域的比例模型。分析影响堵剂分布模式的主控因素。本申请将为深部调剖施工参数优化设计奠定理论基础。

中文关键词： 深部调剖；提高采收率；分布模式；物理模型；数值模拟

英文摘要： In the process of profile modification, the optimization of operational parameter depends on human experience. And the operation parameter is not reasonable. The reason is the lack of quantitative description between injection pressure and gels distribution pattern. In this study, the plugging agent type is polymer gel. Plane heterogeneous cementation model and multilayer radial heterogeneous model are used to reveal the relationship between injection pressure and plugging agent distribution pattern. The differences in a distribution pattern between before gelling and after gelling are studied. Aiming at the problems of the capillary number with strong heterogeneity in the channelling reservoir, the method for calculating the relative permeability curve with different displacement velocity is established. The compositional numerical simulator is corrected. Using the corrected numerical simulator, the range of physical simulation parameter variation is extended. The model for calculating the proportion of gels into channeling zone and non channeling zone is established. Main control factors of the influence of plugging agent distribution pattern are analyzed. To achieve fine control of plugging agent distribution patterns, The collaborative optimization method for injection pressure, plugging agent dosage and displacement slug length is established. This application will lay the theoretical foundation for the design and optimization of operational parameters in the process of deep profile modification.

英文关键词： deep profile modification;enhanced oil recovery;distribution pattern;physical simulation;numerical simulation