多孔介质中预交联凝胶颗粒渗滤规律及动力学模型研究

项目名称： 多孔介质中预交联凝胶颗粒渗滤规律及动力学模型研究

项目编号： No.51474226

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 张红玲

作者单位： 中国石油大学（北京）

项目金额： 82万元

中文摘要： 预交联凝胶颗粒（PPG）是一种可以吸水溶胀的高分子微球，它不同于刚性颗粒，具有良好的变形虫特性，可以在多孔介质中发生运移->沉积或堵塞->携带或变形->再运移或重启动等一系列行为，从而实现动态调剖功能。本研究首先通过静态实验研究PPG吸水溶胀性能、悬浮体系流变性；然后，开展微观可视化实验研究PPG发生表面沉积、孔喉堵塞、沉积颗粒再运移、堵塞颗粒重启动控制条件和影响因素；在此基础上，通过岩心驱替实验和核磁共振成像技术研究多孔介质中颗粒运移、封堵机理以及颗粒滞留导致多孔介质孔隙度、渗透率变化规律，据此建立描述PPG渗滤机理的动力学模型；最后，建立PPG驱提高采收率数学模型系统并采用数值模拟方法优化设计矿场PPG驱实施方案。本研究一方面可填补国内外关于粘弹性可变形颗粒多孔介质中渗滤规律及数学模型方面研究的空白，另一方面可为迫切需要提高原油采收率的高含水油藏开展PPG驱提高理论依据和关键参数。

中文关键词： 油气田开发；油藏数值模拟；渗滤机理；提高采收率；预交联凝胶颗粒

英文摘要： Performed Particle Gel(PPG) is a type of polymer microspheres with well water swelling characteristic. Comparing with traditional rigid particles, it possesses a very good property of amoeba. Therefore, a series of behaviors are performed when it flows in porous media, such as migration, deposition or plugging, entrainment or deformation, remigration or restarting, thus, dynamic profile control is realized. In this study, first, static experiments are carried out to study the swollen properties of PPG and rheology of PPG suspension; then,microscopic visual experiments are performed to study the influencing factors and controlled conditions of surface deposition, pore throat plugging, remigration and restarting in porous media; On this basis, coreflooding and NMR imaging technique are used to study the mechanisms of particle migration, deposition and plugging processes, the variation of porosity and permeability due to PPG retention,and the EOR mechanisms of PPG flooding, according to these results, the kenitic model of PPG filtration will be estabilished. Finnally, a novel mathematical model of PPG flooding for EOR will be also estabilished, and used to optimize some programs and parameters for PPG flooding in oilfield. The significances involve that, on one hand, it makes great attribution and fills the gap in the field of PPG filtration and numerical simulation in porous media; on the other hand, it provides theoretical basis and key parameters for carrying out PPG flooding to improve oil recovery in high water-cut resercoirs.

英文关键词： Oil and gas develpment;Numerical simulation;Filtration mechanism;Enhanced oil recovery;Performed Particle Gel