缝洞型油藏三重介质数值试井解释方法研究

Triple-continuum numerical well test interpretation method for a naturally fractured vuggy reservoir

该文提出了基于高斯牛顿反演法的试井曲线自动拟合算法,通过对缝洞型油藏三重介质数值试井模型的理论试井曲线进行拟合,证明了该数值试井解释的正确性和实用价值。指出选择合适的初始模型和扰动量,并根据曲线形态和敏感性分析结果确定反演参数在此反演方法中的重要作用,用提出的方法对塔河油田的两口实测井进行了试井解释,获到较高的曲线拟合度和合理的参数解释结果。

Based on conceptual mathematical model of multi-continuum flows, using Gauss-Newton inversion method, an auto-match method of triple-continuum numerical well testing pressure response curve for a naturally fractured vuggy was presented and exemplified. It was pointed that it is very important to select a reasonable initial model and disturbing value and to determine inverted parameter according to the result of sensitivity analysis. This method was used successfully in well test interpretation in the Tahe oilfield.