新疆石油地质 ›› 2006, Vol. 27 ›› Issue (5): 626-628.

• 讨论与争鸣 • 上一篇    下一篇

地层水在天然气保存中的积极作用

程付启1, 金强1, 姜桂凤2, 张永梅2, 侯泽生2   

  1. 1.中国石油大学地球资源与信息学院, 山东东营 257062;
    2.中国石油青海油田分公司, 甘肃敦煌 736202
  • 收稿日期:2006-01-09 修回日期:2006-03-08 出版日期:2006-10-01 发布日期:2020-10-20
  • 作者简介:程付启(1978-), 男, 河南开封人, 在读博士研究生, 石油地质,(Tel) 0546-8391043(E-mail) chengfq9804@yahoo.com.cn.
  • 基金资助:
    国这重点基础研究发展规划项目, 高效天然气藏形成分布与凝析、低效气藏经济开发的基础研究(2001CB209102)资助

Positive Effect of Formation Water on Conservation of Natural Gas

CHENG Fu-qi1, JIN Qiang1, JIANG Gui-feng2, ZHANG Yong-mei2, HOU Ze-sheng2   

  1. 1. School of Geo-Resources and Information, China University of Petroleum, Dongying, Shandong 257061, China;
    2. Qinghai Oilfield Company, PetroChina, Dunhuang, Gansu 736202, China
  • Received:2006-01-09 Revised:2006-03-08 Online:2006-10-01 Published:2020-10-20

摘要: 利用实验和实测数据,结合气藏实例分析,对地层水在天然气保存中的积极作用进行了论述: ①孔隙水的存在改变了泥质岩孔隙结构,使其排替压力增加、扩散系数降低,从而提高其阻止天然气渗漏和扩散的能力; ② 大量地层水为天然气提供了良好的暂存空间,避免了早期生成天然气的大量逸失,提高了天然气成藏的有效性; ③ 由于地层水的存在,天然气可以以溶解态、水合物等形式富集下来,形成非常规气藏。地层水的参与,扩展了天然气聚集成藏的有利空间,也拓宽了天然气的勘探领域。

关键词: 天然气, 保存, 地层水, 作用

Abstract: Based on the experimental and measured data, the positive effect of formation water on conservation of natural gas is discussed.The case study shows that first, the existence of pore water could change the pore structure of mud, increase its displacement pressure, decrease its diffusion coefficient, thus effectively prevent natural gas from leaking and diffusion out of reservoir; second, plentiful formation water provides good storage space for natural gas, and avoids escape of early generated gas, thus adding possibility of natural gas accumulation; third, the existence of formation water allows natural gas to be accumulated in forms of solution state and hydrate for shaping non-conventional gas pool. Therefore, formation water is favorable for extension of space of gas accumulation, hence enlarging the scope or area for natural gas exploration.

Key words: natural gas, conservation, formation water, effect

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