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

来源：Science in China - Series D: Earth Sciences , 2007, 50: 91-102.

DOI：10.1007/s11430-007-6019-9

• hydrocarbon migration
• percolation theory
• numerical model
• migration pathway
• migration carrier
• heterogeneity

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.

• 出版日期2007-11
• 单位中国石油天然气股份有限公司勘探开发研究院; 中国科学院地质与地球物理研究所; 中国科学院地质与地球物理研究所兰州油气资源研究中心