摘要
提出了一种基于流场-电场耦合的含水合物模拟岩心岩电数值实验方法,包括模拟岩心建立和电学参数计算,即在构建多孔介质几何结构的基础上进行流场和电场耦合计算。利用水驱油过程所形成的油/水分布来模拟水合物/水在模拟岩心中的微观分布状态,通过改变壁面接触角、界面张力、油水黏度比、驱替时间等因素实现对相空间分布和含水合物饱和度的调节。利用平板电极在模拟岩心两侧施加1 Hz^1 MHz频率的交流电场,通过电场计算得到模拟岩心的等效容抗和等效电阻,从而获得宽频率范围的电学响应特性。
A numerical experiment method based on the coupling of flow and electrical fields has been proposed.The numerical method includes establishment of a simulated rock core and calculation of electrical parameters,i.e.,the coupling calculation of flow and electric fields is performed based on the construction of a porous medium geometry.The oil/water distribution formed in the water oil displacement process is used to simulate the micro-distribution state of hydrate/water in the simulated core.The phase spacial distribution and hydrate saturation are adjusted by changing the wall contact angle,interfacial tension,oil-water viscosity ratio and displacement time.The electrical responses such as effective capacitance and resistance of a wide frequency range are obtained by applying an electric field with the frequency of 1 Hz^1 MHz on the simulated core through a pair of flat electrodes on both sides.The proposed numerical experiment method provides a new way for the study of the physical properties of gas hydrate-bearing sediments and oil-bearing rocks.
作者
邢兰昌
齐淑英
李馨
魏伟
韩维峰
XING Lanchang;QI Shuying;LI Xin;WEI Wei;HAN Weifeng(College of Control Science and Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Department of Alternative Energy,Petro China Research Institute of Petroleum Exploration&Development,Langfang 065007,Hebei,China)
出处
《实验室研究与探索》
CAS
北大核心
2020年第12期5-9,50,共6页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(51306212)
中国石油科技创新基金项目(2018D-5007-0214)
山东省自然科学基金项目(ZR2019MEE095)
中央高校基本科研业务费专项资金项目(20CX05005A)
中石油重大科技项目(ZD2019-184-001)
山东省教学改革项目(2015M016)
山东省研究生教学质量提升计划项目(SDYJG19028)。
关键词
天然气水合物
电学特性
模拟岩心
数值模拟
流场-电场耦合
岩石物理
natural gas hydrate
electrical properties
simulated core
numerical simulation
coupling of flow and electric fields
rock physics
