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压力恢复曲线数值模拟在国内外已成为测试工作中不可缺少的一环,并且也引起了各测试公司的广泛重视。本文考虑了油井打开的完善程度以及井底污染、井筒续流等因素,给出了二个压力恢复曲线数学模型:1.双重介质灰岩地层渗流模型;2.平面砂岩地层渗流模型。通过关井压力恢复曲线实例的拟合与运算,两个模型均可较全面地解释多种地层参数,且从曲线拟合的情况来看,其结果是令人满意的。
The numerical simulation of pressure recovery curve has become an indispensable part of the testing work at home and abroad, and has also drawn the widespread attention of all testing companies. In this paper, we consider the perfection of oil well opening, bottom hole pollution and wellbore continuation. Two mathematical models of pressure recovery curve are given: 1. Percolation model of double media limestone; 2. Percolation model of plane sandstone formation. By fitting and computing the example of the wellbore pressure recovery curve, both models can comprehensively explain various formation parameters, and the results are satisfactory from the curve fitting.