岩性油气藏 ›› 2015, Vol. 27 ›› Issue (3): 56–60.doi: 10.3969/j.issn.1673-8926.2015.03.008

• 油气地质 • 上一篇    下一篇

水溶气脱溶的关键时期研究

杨映涛1,李 琪2,张世华1,朱 丽1   

  1.  1. 中国石化西南油气分公司 勘探开发研究院,成都 610041 ;2. 中国石油长庆油田分公司 气田开发处,西安 710054
  • 出版日期:2015-05-26 发布日期:2015-05-26
  • 第一作者:杨映涛( 1983- ),男,硕士,工程师,主要从事石油天然气勘探方面的综合研究工作。 地址:( 610041 )四川省成都市高新区(南区)吉泰路 688 号中石化西南科研基地 A 座 1803 室。 E-mail : taoyingyang@163.com 。
  • 基金资助:

    国家重大科技专项“四川盆地碎屑岩层系大中型油气田形成规律与勘探方向”(编号: 2011ZX05002-004-001 )和中国石化西南油气
    分公司科技专项“成都凹陷中下侏罗统油气富集规律研究”(编号: GJ-284-1324 )联合资助

Crucial period of water-soluble gas degasification : A case study from Shaximiao Formation in Chengdu Depression

YANG Yingtao1, LI Qi2, ZHANG Shihua1, ZHU Li1   

  1.  1. Research Institute of Exploration and Development , Southwest Oil and Gas Company , Sinopec , Chengdu 610041 , China ;
    2. Department of Gas Field Development , PetroChina Changqing Oilfield Company , Xi ’ an 710054 , China
  • Online:2015-05-26 Published:2015-05-26

摘要:

水溶气脱溶成藏是许多石油地质工作者研究的重点,特别是对水溶气脱溶关键时期的确定更是难点。 在水溶气脱溶的关键时期,水溶气大规模脱溶,若具有匹配良好的储层、圈闭及保存等条件,天然气就可聚集成藏。 利用包裹体、地层水矿化度、温度及压力等分析测试资料,结合盆地模拟手段,通过天然
气溶解度回归方程,计算了成都凹陷重点时期沙溪庙组天然气溶解度,并研究了各时期天然气溶解度的变化特征。 结果表明:须家河组五段烃源岩生排烃高峰期至沙溪庙组成藏期,天然气溶解度降低幅度最大,是沙溪庙组水溶气脱溶的关键时期。

关键词: 水溶气脱溶, 关键时期, 沙溪庙组, 成都凹陷

Abstract:

 The water-soluble gas degasification and accumulation is the key issue of many oil geological workers, especially the crucial period of the water-soluble gas degasification. If have good condition of reservoir, trap and preservation in that period, the gas can accumulate. By means of the analyzing data of inclusion, formation water salinity, temperature and pressure, combining with basin simulation and regression equation of gas solubility, this paper calculated the gas solubility of Shaximiao Formation at the key periods in Chengdu Depression, and researched the alternation characteristics of gas solubility. The results show that the time from the primary time of hydrocarbon expulsion of the source rocks in the fifth member of Xujiahe Formation to the hydrocarbon accumulation period of Shaximiao Formation, the gas solubility is lowest, which is the key period for the water-soluble gas degasification.

Key words:  water-soluble gas degasification, crucial period, Shaximiao Formation, Chengdu Depression

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