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现代地质 ›› 2013, Vol. 27 ›› Issue (5): 1211-1218.

• 油气成藏机理 • 上一篇    下一篇

天然气充注导致储层增压的定量研究

刘一锋1,2,姚倩颖1,谢增业3,邱楠生1,2   

  1. 中国石油大学(北京)油气资源与探测国家重点实验室,北京 102249
  • 收稿日期:2013-06-15 修回日期:2013-06-20 出版日期:2013-10-17 发布日期:2013-10-31
  • 通讯作者: 邱楠生,男,教授,博士生导师,1968年出生,构造地质专业,主要从事沉积盆地构造-热演化和油气成藏机理方面的教学和研究工作。
  • 作者简介:刘一锋,男,博士研究生,1987年出生,矿产普查与勘探专业,主要从事含油气盆地温压场研究和油气成藏机理方面的研究。Email:crazyboyliuyifeng@126.com
  • 基金资助:

    国家科技重大专项(2011ZX05007-002);国家“973”项目(2011CB201101)

Quantitative Study on Pressure Evolution During Gas Charging to Reservoirs

LIU Yi-Feng1,2,YAO Qian-Ying1,XIE Zeng-Ye3,QIU Nan-Sheng1,2   

  1. State Key Laboratory of Petroleum Resources and Prospecting ,China University of Petroleum,Beijing 102249
  • Received:2013-06-15 Revised:2013-06-20 Online:2013-10-17 Published:2013-10-31

摘要:

超压对于油气勘探具有重要的意义。以天然气为载体的压力传递是储层超压的重要成因机制。由于地层水和原油对于天然气的溶解性和压缩性存在明显差异,造成了含水地层和油层在天然气充注过程中具有不同压力演化路径。本研究模拟计算不同原始孔隙流体的地层在受到甲烷充注时的压力演化,建立了甲烷充注量与超压的定量关系,进而探讨天然气充注增压的影响因素。结果表明:天然气充注在一定条件下可以造成地层压力的增大;不同原始孔隙流体的储层压力演化路径不同。原始孔隙流体为天然气的地层最先出现超压,但增压缓慢;含水层比含油层增压迅速,更易形成超压;同等封闭条件下,浅部地层比深部地层更易形成超压,高温盆地比低温盆地更易形成超压。

关键词: 储层, 天然气充注, 超压, 定量模型, 影响因素

Abstract:

Overpressure plays an important role in oil and gas exploration. Pressure transfer with gas charging is a dominant overpressure mechanism in reservoirs.  Because of the tremendous difference in gas solubility and compressibility between formation water and oil, there are different pressure evolutions in the aquifer and the oil layer. In this paper pressure changes caused by methane filling in reservoirs with different kinds of initial pore were simulated.  And the quantitative relationship between volume of charged methane and overpressure was established. Then the influencing factors of pressure evolution during gas chargingwere analyzed.The results indicate the following aspects:gas charging could cause increase of pressure in reservoirs; pressue evolution paths are different with different initial pore fluids; strong overpressure is easier to form in aquifer than in oil-bearing formation; in the same sealing condition, it is easier to form ovepressure in shallow strata than in deep strata as well as in high tempeature basin than in low temperature basin.

Key words: reservoir, gas charging, overpressure, quantitative model, influencing factor

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