变流量干扰试井的计算机自动解释

COMPUTERIZED AUTOMATIC INTERPRETATION FOR VARIABLE-RATE INTERFERENCEWELL TESTING DATA

变流量干扰试井包括脉冲试井和常流量干扰试井。本文发展了用于计算机自动解释的受约束非线性回归分析技术,利用Marquardt方法和一维搜索相结合的算法改善回归分析的收敛性。此外,通过解释曲线与实测数据的对比以及统计分析中置信区间的讨论对解释结果进行评价。利用这种方法所研究的解释软件在现场已进行有效的应用,分析了脉冲试井切线法不能解释的测试资料。

Variable-rate interference well testing includes pulse test and conventional interference well test. This paper presents a constrained nonlinear regression method for computerized automatic interpretation of well testing data. Convergence of the regression is improved by an iterative procedure based on a combination of the Marquardt and linear regression of one-dimensional parameter methods. By comparing the field data with those from theoretical reservoir models, the analytical result is evaluated by a confidence interval. An automatic interpretation software is developed also. In order to illustrate the application of the software, actural field data that cannot be analyzed, by the conventional tangent construct technique used in pulse test.