砂岩油藏DST压力卡片的研究及综合解释方法

NEW TYPE-CURVES FOR COMPREHENSIVE ANALYSIS OF DST PRESSURE HISTORY IN A HOMOGENOUS RESERVOIR

本文论述了一种新的砂岩油藏油井 DST 压力卡片的综合解释方法。文中根据 DST 生产测试的特点,建立了新的物理模型和数学模型;利用有限差分法进行了数学模型的求解;进而研制出新的典型曲线图版。利用该图版对实测的 DST 压力卡片进行分析取得了满意结果。

A set of type-curves is presented here which can be used to analyse the whole pressure history of a DST (Drill-Stem Testing) operation in a homo- genous reservoir.They are constructed on the basis of the physical and ma- thematical model considering the skin factor and the wellbore storage,by using finite difference method.Using these type curves,we can estimate the reservoir parameters in case of having no sufficient flow period data or bu- ild-up data.Finally,a satisfactory interpretation of a field example is sho- wn with the given type curves.