石油学报 ›› 2012, Vol. 33 ›› Issue (1): 123-127.DOI: 10.7623/syxb201201017

• 油田开发 • 上一篇    下一篇

水平井不稳定试井与产量递减分析新方法

聂仁仕 1 贾永禄 1 朱水桥 2 饶 政 2 张春光 2 高银香 2   

  1. 1 西南石油大学油气藏地质及开发工程国家重点实验室 四川成都 610500;2中国石油新疆油田分公司 新疆克拉玛依 834000
  • 收稿日期:2011-05-07 修回日期:2011-08-09 出版日期:2012-01-25 发布日期:2012-03-22
  • 通讯作者: 聂仁仕
  • 作者简介:聂仁仕,男,1982年3月生,2011年获西南石油大学油气田开发工程专业博士学位,现为西南石油大学讲师,主要从事油气田开发理论与应用研究工作。
  • 基金资助:

    国家重大科技专项(2008ZX05004)和中央财政支持地方高校发展专项资金资助。

A new method for the transient well test of horizontal wells and the analysis of the production decline

NIE Renshi 1 JIA Yonglu 1 ZHU Shuiqiao 2 RAO Zheng 2 ZHANG Chunguang 2 GAO Yinxiang 2   

  • Received:2011-05-07 Revised:2011-08-09 Online:2012-01-25 Published:2012-03-22

摘要:

针对水平井负表皮问题,在传统分析方法的基础上,建立了水平井不稳定试井与产量递减分析理论模型。利用拉普拉斯变换、分离变量及特征函数与特征值法等现代数学分析方法对模型进行了求解,获得了拉普拉斯空间中井底压力动态响应表达式和递减产量表达式。最后利用数值反演,得到了典型的试井分析和Blasingame产量递减分析样版曲线,并划分了流动阶段,分析了流动特征。此外,得到了受负表皮影响的样版曲线,样版曲线不再振荡,成功地解决了水平井负表皮问题。

关键词: 水平井, 不稳定试井, 产量递减分析, 负表皮, 样版曲线

Abstract:

In order to solve the negative skin problem of horizontal wells, we established a theoretical model for the transient well test of horizontal wells and for the analysis of production decline based on traditional analysis methods. The model was solved with modern mathematical methods including the Laplace transformation, separation of variables, eigenvalue and eigenfunction. Expressions for a dynamic response to bottomhole pressure in the Laplace space and for production decline rates were obtained. Finally, type curves of typical well test and the Blasingame production decline rate analysis were programmed and plotted, and flow stages were divided so as to analyze characteristics of type curves. In addition, type curves affected by negative skin were especially plotted and they were no longer oscillatory, indicating a successful settlement of the negative problem of horizontal wells.

Key words: horizontal well, transient well test, analysis of production decline, negative skin, type curve