摘要
计算机自动拟合中用置信区间来表示每一计算参数的可信度，用累积残差作为目标函数来控制计算过程。对于手工拟合，难以用累积残差作为目标函数来寻优。本文提出用双对数及压力导数复合检验图上，实测与理论的压力与压力导数曲线间面积之差来评价拟合结果的好坏，评价的结果是从０到１００之间的百分数。实际应用表明，用本文提出的评价方法，可以提高在计算机辅助下的典型曲线拟合精度，使得不同井次的解释精度具有可对比性。本文提出的精度评价方法也适用于计算机自动拟合。
In automatic type-curve matching, confidence interval is adopted to describe the interpretation accuracy for each calculated parameter, accumulative difference is used to evaluate the whole interpretation precision. Besides using accumulative difference,this paper presents a new approach to evaluate the interpretation precision for manual type-curve matching. For log-log analysis, it is the difference between the areas enclosed by pressure and its derivative for tested and corresponding analytical data.The evaluation result is a percentage number between 0 and 100. It is demonstrated that the use of this approach proposed by this paper can promote the precision of manual type-curve matching, and different interpretation precisions can be compared.This method can also be extended to automatic type-curve matching.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
1996年第3期64-67,共4页
Petroleum Exploration and Development
关键词
试井
曲线拟合
典型曲线拟合
评价
精度
Evaluation, Well test, Accuracy, Typical curve, Matching
