新疆石油地质

新疆石油地质 ›› 1998, Vol. 19 ›› Issue (4): 308-311.

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试井分析中的变井储问题研究

贾永禄, 杨学文, 郭建国   

  1. 西南石油学院 南充 637001
  • 收稿日期:1997-10-07 出版日期:1998-08-01 发布日期:2020-09-19
  • 作者简介:贾永禄:教授 油气田开发

STUDY ON VARIABLE WELLBORE STORAGE IN WELL TEST ANALYSIS

Jia Yonglu, Yang Xuewen, Guo Jianguo   

  1. Southwest Petroleum Institute, Nanchong, Sichuan 637001
  • Received:1997-10-07 Online:1998-08-01 Published:2020-09-19
  • About author:Jia Yonglu, Professor, Oil and Gas Field Development

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摘要： 常规试井分析理论把井筒储集系数视为一个常数, 这虽然简化了模型, 但却给许多试井早期数据的分析带来困难,作者较详细地探讨、总结了试井分析中的变井储问题, 并且研究了在有效井径模型中, Fiar 模型和误差函数变井储模型的应用, 有效地解决了真实井径模型中当表皮系数为负值时计算发散的困难。还讨论了地层压力的计算受变井储的影响。

关键词: 试井解释, 井筒储存, 表皮系数, 井径, 地层压力, 数学模型

Abstract: The wellbore storage coefficient C is always regarded as a constant in conventional well test analysis.It simplified the model, but made it difficult to undertake data analysis in early period of well test.This paper discussed and summarized the variable wellbore storage in well test analysis in detail, and studied the application of Fiar model and error function variable wellbore storage model.These models enabled i t easier to calculate the divergence in true wellbore di-ameter model when skin factor is negative.Also, i t discussed the effect on formation pressure calculation when taking the variable wellbore storage into account.

Key words: Well test interpretation, Wellbore storage, Skin factor, Hole diameter, Formation pressure, Mathmatics model