西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

页岩气储层压裂水平井三线性渗流模型研究

郭小哲1 *,周长沙2   

  1. 1. 中国石油大学(北京)石油工程学院,北京昌平102249
    2. 中国石化东北石油局,吉林长春130062
  • 出版日期:2016-04-11 发布日期:2016-04-11
  • 通讯作者: 郭小哲,E-mail:mbahgg@163.com
  • 基金资助:

    校基金项目《页岩气藏压裂水平井气水两相渗流机理研究》(2462015YQ0215)。

The Trilinear Seepage Model for Fractured Horizontal Well in Shale#br# Gas Reservoir

GUO Xiaozhe1*, ZHOU Changsha2   

  1. 1. College of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    2. Northeast Petroleum Bureau,SINOPEC,Changchun,Jilin 130062,China
  • Online:2016-04-11 Published:2016-04-11

摘要:

具有天然裂缝发育及纳米级孔隙的页岩气储层渗流具有多种模式,压裂水平井开发模式已成为页岩气藏主要
开发模式,渗流数学模型的建立与求解具有很强的理论意义和现实价值。借鉴已有的三线性渗流模型思路,重新设计
了模型的构成,并建立了包括解吸吸附的渗流数学模型,借助无因次化及拉普拉斯变换推导出单井压裂水平井页岩气
藏的产能公式和井底压力公式,最后,应用得到的结果进行了单井生产过程中影响因素的分析。通过研究与应用表
明,由该简化模型得到的公式能方便而且准确地计算并预测页岩气的产量变化,而且对于压裂设计也可提供设计参数
的优化分析方法。

关键词: 页岩气, 渗流, 水平井, 压裂, 产能方程, 裂缝

Abstract:

Shale gas reservoirs with plenty of natural fractures and nano-scale poreshave a variety of seepage patterns,fractured
horizontal well has become the key production method,in which establishment and solution of percolation mathematical model
is of a strong theoretical and practical value. Drawing lessons from the existing three linear seepage model,we re-designed
the composition of the model,and established seepage mathematical model including adsorption and desorption. The capacity
formula of single well production of fracturing shale gas reservoir horizontal well and the bottom hole pressure formula are
deduced with the help of dimensionless and Laplace transform. Then we applied the results to the analysis of the influence
factors in the process of single well production. The results show thatthe formulae obtained by the simplified model can calculate
and predict the changes of shale gas production with convenience and accuracy,and also provide the optimization of design
parameters for fracturing design.

Key words: shale gas, seepage, horizontal well, fracturing, deliverability equation, fracture

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