底水稠油油藏水平井含水规律预测方法

针对底水稠油油藏水平井出水位置难以确定的问题,通过建立底水稠油油藏物理及数学模型,利用Green函数、Newman乘积方法和叠加原理推导底水稠油油藏水平井非均匀产液的压力响应解析解,采用Stehfest数值反演算法得到考虑井筒储集效应和表皮效应的底水稠油油藏水平井分段产液试井井底压力解.通过绘制水平井分段试井典型图版,进行流动阶段划分及分析,进而得到不同生产段长度、生产段数目、生产段位置分布、流量分布等影响因素影响规律,并绘制相关解释图版.矿场应用实例验证了研究结果的有效性及广阔的应用前景.

Prediction and application of water production rule of horizontal well in heavy oil reservoir with bottom water

Aiming at the problem of determining the position of the water production of the horizontal well in the heavy oil reservoir with bottom water, this paper establishes the physical and mathematical model of the bottom water heavy oil reservoir, using the Green function, the Newman product method, and the superposition principle to derive the non-horizontal well in the bottom water heavy oil reservoir. The Stehfest numerical inversion algorithm was used to obtain the bottom fluid pressure solution of the horizontal well production in the bottom water thick oil reservoir with the wellbore storage effect and skin effect. By drawing a typical plate for horizontal well testing in stages, and dividing and analyzing the flow stages, the influence factors of different production lengths, number of production sections, position distribution of production sections, and flow distribution are obtained, and relevant explanatory plates are drawn. The field application examples verify the validity of the research results and broad application prospects.