非均质复合油气藏水平井渗流与试井分析研究

发布时间：2018-01-16 14:43

本文关键词：非均质复合油气藏水平井渗流与试井分析研究　出处：《西南石油大学》2017年硕士论文　论文类型：学位论文

【摘要】：复合油气藏渗流模型被广泛应用于试井分析中,目前关于复合油气藏水平井(穿区、偏心尚未发现)渗流模型的研究较少,不能满足现场实际需求。针对这一问题,按照井在储层中的不同位置,建立并求解了一系列的复合油气藏水平井渗流模型,编程绘制了典型的理论曲线,分析了各流动阶段在曲线上的特征及各模型参数对理论曲线的影响。研究的渗流模型有:(1)复合油气藏水平井模型(内外区为不同均质、不同双重介质),着重分析了水平井长度、垂直/水平渗透率、导压系数比、流度比等模型参数对样版曲线的影响;(2)复合油气藏水平井偏心模型(内外区为不同均质、不同双重介质),着重分析了偏心距等参数对样版曲线的影响,通过与不偏心的样版曲线对比发现:偏心时的压力导数曲线上多一个由水平井偏心引起的过渡段,其斜率小于不偏心的情形;(3)复合油气藏水平井穿区模型(内外区为不同均质、不同双重介质),着重分析了复合半径等参数对样版曲线的影响,通过与不穿区的样版曲线对比发现:内外区为不同均质介质时的压力导数曲线上比不穿区时少了一个内区径向流阶段,内外区为不同双重介质时的压力导数曲线上比不穿区时少了内区径向流阶段与内区中基质系统向裂缝系统窜流阶段。研究的模型在一定程度上完善和丰富了试井分析模型,可为油田的生产提供更好的指导。
[Abstract]:The percolation model of compound oil and gas reservoir is widely used in well test analysis. At present, there is little research on the percolation model of horizontal well in compound oil and gas reservoir (perforating area, eccentricity has not been found). Aiming at this problem, according to the different positions of wells in the reservoir, a series of percolation models of horizontal wells in compound oil and gas reservoirs are established and solved, and typical theoretical curves are drawn by programming. The characteristics of each flow stage on the curve and the influence of the model parameters on the theoretical curve are analyzed. The seepage model studied is: 1) the horizontal well model of compound reservoir (different homogeneity and dual media in the inner and outer areas). The effects of model parameters such as horizontal well length, vertical / horizontal permeability, pressure conductivity ratio and mobility ratio on the pattern curve are analyzed. (2) the eccentricity model of horizontal wells in compound oil and gas reservoirs (different homogeneity and double medium in the inside and outside area). The influence of eccentricity and other parameters on the pattern curve is analyzed emphatically. By comparing with the uneccentric sample curve, it is found that there is one more transition section in the eccentric pressure derivative curve caused by the eccentricity of horizontal well, and its slope is smaller than that of non-eccentricity; The model of horizontal well penetration area in compound oil and gas reservoir (internal and external area is different homogeneity, different double medium), the influence of compound radius and other parameters on the pattern curve is analyzed emphatically. It is found that there is one less radial flow phase in the pressure derivative curve with different internal and external homogeneous media than in the non-penetrating zone. The pressure derivative curves of different internal and external media have less radial flow stage in inner zone and channeling phase of matrix system to fracture system in inner zone than in non-penetrating zone. The model has been improved and enriched well testing to a certain extent. Analytical model. It can provide better guidance for oilfield production.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE312;TE353

【相似文献】