Numerical modeling of secondary migration and its applications to Chang-6 Member of Yanchang Formation (Upper Triassic), Longdong area, Ordos Basin, China  

作　　者：LUO XiaoRong YU Jian ZHANG LiuPing YANG Yang CHEN RuiYin CHEN ZhanKun ZHOU Bo 

机构地区：[1]Key Laboratory of Petroleum Resources Researches, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China Institute of Petroleum Exploration and Development, Changqing Oil Company, PetroChina Company Limited, Xi'an 710021, China Key Laboratory of Petroleum Resources Researches, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China Institute of Petroleum Exploration and Development, Changqing Oil Company, PetroChina Company Limited, Xi'an 710021, China Key Laboratory of Petroleum Resources Researches, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China Key Laboratory of Petroleum Resources Researches, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China Key Laboratory of Petroleum Resources Researches, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

出　　处：《Science China Earth Sciences》2007年第z2期91-102,共12页中国科学（地球科学英文版）

摘　　要：Mathematic modeling, established on the basis of physical experiments, is becoming an increasingly important tool in oil and gas migration studies. This technique is based on the observation that hydrocarbon migration tends to take relative narrow pathways. A mathematical model of hydrocarbon migration and accumulation is constructed using the percolation theory. It is then calibrated using physical experimental results, and is tested under a variety of conditions, to understand the applicability of the model in different migration cases. Through modeling, dynamic conditions of large-scale migration pathways within homogeneous formations can be evaluated. Basin-scale hydrocarbon migration pathways and their characteristics are analyzed during the model application to the Chang-8 Member of the Triassic Yanchang Formation in Longdong area of Ordos Basin. In heterogeneous formations, spatial changes in fluid potential determine the direction of secondary migration, and heterogeneity controls the characteristics and geometry of secondary migration pathways.

关 键 词：HYDROCARBON migration  PERCOLATION theory  NUMERICAL model  MIGRATION pathway  MIGRATION carrier  heterogeneity 

分 类 号：N[自然科学总论]