Title

INFLUENTIAL FACTORS IN NATURAL GAS MIGRATION AND ACCUMULATION

作者

朱华银李剑李拥军

Authors

Zhu Huayin Li Jian Li Yongjun

单位

西南石油大学, 成都, 610500 2. 中国石油天然气股份有限公司, 勘探开发研究院, 廊坊分院, 河北, 廊坊, 065007 3. 中国石油天然气股份有限公司, 新疆油田分公司, 采油一厂, 新疆, 克拉玛依, 834000

Organization

Southwest Petroleum University, Chengdu, Sichuan 610500, China 2. Langfang Branch, Research Institute of Petroleum Exploration and Development, CNPC, Langfang, Hebei 065007, China 3. No. 1 Production Plant, Xinjiang Oil Field Company, CNPC, Karamay, Xinjiang 834000, China

摘要

运用长岩心实验装置在真实岩心中进行天然气运移模拟实验,研究了影响天然气运聚的因素。气体运移需要克服毛管压力的作用,优先进入输导层的大孔隙。输导层物性好、大孔隙多,聚集的气体就较多,否则气体向远处运移。气体运移速率快,基本不受时间影响,只要气源压力足够克服毛管压力,气体就可“瞬时”向前运移。受浮力影响,天然气更易向上运移,且效率高、距离远,相同条件下,上下运移所能到达的距离比约为3:1。

Abstract

The factors influencing gas migration are studied by simulating natural gas migration in natural core,using long-core experimental installation.Natural gas migration is related to the physical characteristics of rock and the pressure of gas source.Gas migrates first into large pores of migration formations after overcoming the influence of capillary pressure.If migration formations have good physical properties and much larger pores,much more gas will be accumulated,otherwise it will migrate far away.It does not depend on time because the rate of gas movement is fast.When the pressure of gas resource is large enough to overcome capillary pressure,gas can migrate forward transiently.The differences between migrating upwards and downwards are great because of the buoyancy force.It is easy and high efficient to migrate upwards. The distance of gas migration upwards is three times of that of downwards in the same conditions.

关键词：

影响因素; 含气饱和度; 模拟实验; 天然气运移;

Keywords:

influential factors; gas saturation; simulation experiment; natural gas migration;

基金项目

“九五”国家重点科技攻关项目(99-110-01-03)

DOI

https://doi.org/10.11781/sysydz200602152

天然气运聚影响因素研究