Experiment and simulation study on construction of a three-dimensional network model  

作　　者：HOU Jian LI ZhenQuan ZHANG SunKang CAO XuLong SONG XinWang GAO DeBo 

机构地区：[1]College of Petroleum Engineering,China University of Petroleum,Dongying 257061,China [2]College of Chemistry Science and Chemical Engineering,China University of Petroleum,Beijing 102249,China [3]Research Institute of Geologic Science,Shengli Oilfield,Sinopec,Dongying 257015,China [4]Research Institute of Geologic Science,Jiangsu Oilfield,Sinopec,Yangzhou 225009,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2008年第11期1761-1774,共14页中国科学：物理学、力学、天文学（英文版）

基　　金：the National Natural Science Foundation of China (Grant Nos. 10302021 and 10772200)

摘　　要：The construction of a network model is one of the key techniques in organic com-bination of microscopic flow experiment and simulation. The construction method of a three-dimensional network model is presented on the basis of CT scanning images in this paper. A series of CT slice images describing microscopic pore structure and fluid distribution of actual rock is obtained with the help of the in-dustrial microfocus CT system. Based on the extraction of pore space skeleton, pore and throat information, the corresponding network model is established, and the conversion from three-dimensional CT image information to pore-throat size distribution and topological information is also achieved. The feature of this me-thod lies in the fact that complicated pore space of rock may be characterized by pores and throats with a simple shape while keeping the geometry and flow char-acteristics. It is indicated that the calculated results of porosity, permeability, rela-tive permeability curve and microscopic remaining oil distribution match very well the experimental results of water flooding and polymer flooding. This network model may fairly well characterize the rock microscopic pore-throat size and topo-logical characteristics.The construction of a network model is one of the key techniques in organic combination of microscopic flow experiment and simulation. The construction method of a three-dimensional network model is presented on the basis of CT scanning images in this paper. A series of CT slice images describing microscopic pore structure and fluid distribution of actual rock is obtained with the help of the industrial microfocus CT system. Based on the extraction of pore space skeleton, pore and throat information, the corresponding network model is established, and the conversion from three-dimensional CT image information to pore-throat size distribution and topological information is also achieved. The feature of this method lies in the fact that complicated pore space of rock may be characterized by pores and throats with a simple shape while keeping the geometry and flow characteristics. It is indicated that the calculated results of porosity, permeability, relative permeability curve and microscopic remaining oil distribution match very well the experimental results of water flooding and polymer flooding. This network model may fairly well characterize the rock microscopic pore-throat size and topological characteristics.

关 键 词：CT EXPERIMENT network model water FLOODING POLYMER FLOODING MICROSCOPIC FLOW 

分 类 号：O35[理学—流体力学]