基于PDA方法的缝洞型油藏井控储量评价

发布时间：2018-06-07 00:40

  本文选题：缝洞型油藏 + 生产动态分析　； 参考：《断块油气田》2017年02期

【摘要】：缝洞型碳酸盐岩油藏储集体类型多样,非均质性极强,且流动规律复杂,有效评价此类油藏的井控储量是调整油田开发方案、制定油井改造措施的基础。为了克服常规方法在计算此类油藏井控储量上的不足,文中提出了基于PDA方法的缝洞型油藏井控储量评价方法。该方法针对缝洞型油藏的特点,建立了地质静态特征与开发动态特征相结合的生产井类型划分标准,对不同类型井进行地质概念特征与流体流动模式的假设,利用PDA方法拟合多条典型曲线,通过井底流压的折算、井控范围的修正与拟稳态条件下PVT的计算提高曲线拟合精度,形成了缝洞型油藏井控储量的评价流程。研究结果表明,基于该方法评价的井控储量与实际认识相符,研究区剩余可采储量主要存在于Ⅰ,Ⅱ类井钻遇区,存在形式以洞顶剩余油为主,这些剩余可采储量是进一步调整挖潜的目标。
[Abstract]:The reservoir types of fractured and cavernous carbonate reservoirs are various, heterogeneity is very strong, and the flow law is complex. The effective evaluation of well control reserves of this kind of reservoirs is the basis for adjusting the development plan of oil fields and formulating the measures for oil well transformation. In order to overcome the deficiency of conventional method in calculating well controlled reserves of this kind of reservoirs, a method for evaluating well controlled reserves of fractured and cavernous reservoirs based on PDA method is put forward in this paper. According to the characteristics of fracture-cavernous reservoir, this method establishes the classification standard of production well type combining geological static characteristics and development dynamic characteristics, and hypothesizes of geological concept characteristics and fluid flow model for different types of wells. By using PDA method to fit several typical curves, through the conversion of bottom hole flow pressure, the modification of well control range and the calculation of PVT under quasi steady state condition, the curve fitting accuracy is improved, and the evaluation flow of well control reserves in fractured and cavernous reservoirs is formed. The results show that the well control reserves evaluated by this method are consistent with the actual knowledge. The remaining recoverable reserves in the study area mainly exist in the drilling areas of type 鈪，

本文编号：1988881