天然气地球科学

• 天然气开发 • 上一篇    下一篇

“一点法”不同温度吸附曲线预测模型

李靖1,李相方1,王香增2,李莹莹3,石军太1,冯东1,彭泽阳1,于鹏亮1   

  1. 1.中国石油大学(北京)石油工程教育部重点实验室,北京 102249;
    2.延长石油集团有限责任公司,陕西 西安 710075;3.中海油研究总院,北京 100027
  • 收稿日期:2015-07-10 修回日期:2015-10-07 出版日期:2016-06-10 发布日期:2016-06-10
  • 通讯作者: 李相方(1955-),男,山东聊城人,教授,博士生导师,主要从事油气田开发理论与系统工程研究. E-mail:lixf2013@vip.163.com.
  • 作者简介:李靖(1990-),男,陕西延安人,博士研究生,主要从事页岩气等非常规天然气开发研究. E-mail:lijingsuc@163.com.
  • 基金资助:
    国家自然基金项目(编号:51490654);国家科技重大专项(编号:2016ZX05039);国家科技重大专项(编号:2016ZX05042)联合资助.

A new method to predict adsorption isotherms under different temperatures

Li Jing1,Li Xiang-fang1,Wang Xiang-zeng2,Li Ying-ying3,Shi Jun-tai1,Feng Dong1,Peng Ze-yang1,Yu Peng-liang1   

  1. 1.Key Laboratory for Petroleum Engineering of the Ministry of Education,China University of Petroleum,Beijing 102249,China;
    2.Shaanxi Yanchang Petroleum (Group) Corp.Ltd.,Xi’an 710075,China;3.CNOOC Research Institute,Beijing 100027,China
  • Received:2015-07-10 Revised:2015-10-07 Online:2016-06-10 Published:2016-06-10

摘要: 利用已知埋深储层在一定温度下甲烷吸附特征,预测深部或浅部储层不同温度和不同压力条件下的吸附能力,对页岩气藏的勘探开发具有重大实用意义。基于Polanyi吸附势理论与Langmuir吸附理论,揭示了温度对吸附曲线的影响规律,提出了“仅利用一条等温吸附曲线预测其他温度吸附曲线”的方法。利用本研究方法,在龙马溪组页岩S1室内实验30℃吸附数据的基础上,预测出45~120℃吸附曲线,同时,结合实际储层压力梯度与地温梯度,量化了储层埋深与页岩吸附能力关系曲线。验证结果表明:页岩S1在不同温度下的吸附曲线预测结果与实验数据基本吻合;且预测的等温吸附曲线符合Clausius-Clapeyron等量吸附热理论,从而可以仅利用一条等温吸附曲线计算出该页岩样品吸附热,将为高效评估储层条件下页岩吸附气含量奠定理论基础。

关键词: 页岩, 温度, 吸附势, 吸附热, 吸附曲线预测

Abstract: Prediction of adsorption isotherms under different temperatures is significant to reserve estimation of shale gas reservoir.Based on the Polanyi’s adsorption potential theory and Langmuir adsorption theory,a method was presented to predict adsorption isotherms with different temperatures only by one isotherm.In this method,the relationship between Langmuir pressure and temperature was quantified.Otherwise,the independent relationship of Langmuir volume and temperature were also found.By utilizing this method,we predicted adsorption isotherms of Longmaxi shale from 45℃ to 120℃ according to experiment data under 30℃.Meanwhile,by considering the pressure and temperature gradients,we also predicted the relationship between depth and adsorption capacity of Longmaxi shale gas reservoir.Result shows that,the adsorption data predicted by our method is in accord with experimental data and the error coefficient is less than 5%.In addition,the adsorption heat of Longmaxi shale can be calculated by predicting adsorption data based on Clausius-Clapeyron theory.Therefore,our study will supply the theoretical foundation for the efficient evaluation of shale adsorbed gas content under reservoir condition.

Key words: Shale, Temperature, Adsorption potential, Adsorption heat, Adsorption isotherms prediction

中图分类号: 

  • TE132.2

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