层间干扰与油气差异充注

INTERLAYER INTERFERENCE AND DIFFERENTIAL INJECTION OF HYDROCARBON INTO A TRAP

吴胜和 曾溅辉 林双运 郭燕华

WU Shenghe ZENG Jianhui LIN Shuangyun GUO Yanhua

石油大学, 石油天然气成藏机理教育部重点实验室, 北京, 102249 2. 石油大学, 资源与信息学院, 北京, 102249 3. 中国石油, 勘探开发科学研究院, 北京, 100083

Key Laboratory of Hydrocarbon Accumulation, Ministry of Education, Beijing 102249, China 2. College of Resources and Information, University of Petroleum, Beijing 102249, China 3. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China

通过物理模拟实验及油田实际数据的统计分析,文中探讨了储层层间非均质性对油气二次运移过程中油气充注圈闭的控制作用,首次提出了油气充注的渗透率临界级差的概念.在油气充注过程中,层间干扰导致高渗层对低渗层的屏蔽作用,使得油气充注是在一定的层间渗透率级差(即临界级差)范围内进行的,储层渗透率下限值与最高砂层渗透率具有良好的双对数正相关关系.

Through physical simulation experiments and the statistical analyses of practical data from oilfields,the authors intended to make a systematic analysis of the influence of reservoir interlayer heterogeneity on the differential injection of hydrocarbon into a trap in secondary migration.It put forth for the first time a concept of critical permeability grade ratio for hydrocarbon injection.In the process of hydrocarbon injection,interlayer interference led to the shielding action of high permeability zones on low-permeability ones,thus making hydrocarbon injection take place only within definite bounds of interlayer permeability grade ratio (or critical grade ratio).The lower permeability limit value of a reservoir has a good relationship of log-log positive correlation with the highest permeability of sandbody within the reservoir.

中国石油天然气总公司"九五"重大科研项目(960007).

https://doi.org/10.11781/sysydz200303285