裂缝和洞与井筒连通的三重介质油藏试井解释方法研究

The study of well test interpretation method for a triple medium reservoir

针对由基岩、裂缝和溶洞组成的三重介质油藏提出了裂缝和洞与井筒连通的试井解释模型,建立了相应的数学模型,并采用Laplace变换和数值Laplace反演方法进行了求解,分析了介质的弹性储容比、窜流因子以及裂缝渗透率比对压力响应的影响,同时还提出了三重介质油藏的试井解释方法———利用遗传算法进行自动拟合,并编制了实用软件,实例分析表明了该新方法的可靠性和实用性。

This paper presents a well test interpretation model for a triple medium reservoir composed of matrix, fracture and vugs. The mathmatical model is established and analytical solution is presented by use of Laplace transfrom and numerical Laplace inverse method. The influence of storativity ratio, crossflow factor and fracture permeability on pressure response is analyzed. The well test interpretaion method used for triple medium reservoir, namely, an automatic matching by use of genetic theory is presented. The applied software is developed and the practicablity and reliability of the new method are indicated by the analysis of field data.