Application of percolation network to study electric property of reservoir rocks with different porosity and permeability
Wang Ke-wen1, Sun Jian-meng2
1. Research Institute of Petroleum Exploration and Development,PetroChina,Beijing City, 100083,China;
2. China University of Petroleum,Dongying City,Shandong Province, 257061,China
Abstract：The 3-D percolation network reflecting porous structural feature of special reservoir is built up based on analytic data of reservoir cores with different property of porosity and permeability. Firstly, the total feature of electricity of reservoir with different porosity and permeability is analyzed by correlation of simulating results with experimental results; then, the influence of resistivity of formation water and shaliness on electric property of rocks with different porosity and permeability is studied by numeric simulation. The studied results showed that along with decrease of porosity and permeability property, the resistivity is rise in a condition of same water saturation; the residual water saturation in reservoir with low porosity and permeability is greater than that with higher porosity and permeability. The influence of resistivity of formation water and shaliness on electric property of rocks is relative to the property of porosity and permeability; the influence size of resistivity of formation water and shaliness on electric property of rocks in reservoir with lower porosity and permeability is greater than that with higher porosity and permeability; there is larger influence of clay on electric property of rocks with lower porosity and permeability when exchangeable cation concentration of clay is lower. In study of electric property of reservoir with lower porosity and permeability and logging evaluation, accurately getting the physical parameters such as resistivity of formation water and shaliness has important meaning.
王克文, 孙建孟. 应用逾渗网络模型研究几种不同孔渗储层岩石的电性特征[J]. 石油地球物理勘探, 2008, 43(5): 578-582.
Wang Ke-wen, Sun Jian-meng. Application of percolation network to study electric property of reservoir rocks with different porosity and permeability. OGP, 2008, 43(5): 578-582.
