测井技术2011，Vol.35Issue(5)：406-411,6.
地层压力对自然电位异常影响的数学模拟
Mathematical Simulation for the Influence of Formation Pressure on Abnormal Spontaneous Potential
摘要
Abstract
The abnormal spontaneous potential caused by formation pressure is studied mainly by experimental method in waterflood development. At present, it is impossible in micro-mechanism to get the influence of electrochemical properties on spontaneous potential. According to capillary model in porous medium is used to derive the coupling relationships among percolation field, ion field and current field. And the mathematical simulation method is established to describe the influence of formation pressure on abnormal spontaneous potential. The influence of salinity of formation water, cation exchange capacity and porosity, etc. On spontaneous potential is analyzed quantitatively. The above results show that the bigger the formation pressure difference, the larger the spontaneous potential. The spontaneous potential increases with the increase of cation exchange capacity, porosity and decrease of mud filtrate viscosity. The obtained conclusion proves that the streaming potential is key factor to cause abnormal spontaneous potential.关键词
自然电位/毛细管模型/泥质砂岩/地层压力/数学模拟Key words
spontaneous potential/ capillary model/ shaly sandstone/ formation pressure/ mathematical simulation分类
天文与地球科学引用本文复制引用
于华,关继腾,程媛媛..地层压力对自然电位异常影响的数学模拟[J].测井技术,2011,35(5):406-411,6.基金项目
国家自然科学基金项目(40874064) （40874064）
