基于启动压力梯度等效表征的低渗透油藏数值模拟

发布时间：2018-03-12 10:47

本文选题：启动压力梯度　切入点：等效表征　出处：《断块油气田》2017年04期 　论文类型：期刊论文

【摘要】：目前成熟并应用广泛的大型商业数值模拟软件均基于达西定律,但理论和实验研究均表明低渗透储层存在启动压力梯度;因此,数值模拟在低渗透油藏压裂设计、井网优化和方案研究等方面有一定局限性。部分学者研究编制的数值模拟程序无法处理百万级网格的实际油藏模型,为此,文中通过在商业数模模拟软件中巧妙地设置关键字,建立了一套启动压力梯度在油藏数值模拟中的等效表征方法。运用油藏工程方法中的极限井距理论验证了该方法的可行性;将该方法应用于BZ油田实际油藏模型,指导油田先导试验井压裂设计,证明对存在启动压力梯度的油藏方案研究具有重要意义。
[Abstract]:At present, large commercial numerical simulation software is based on Darcy's law, but theoretical and experimental studies show that there is a starting pressure gradient in low permeability reservoir, so numerical simulation is used in fracturing design of low permeability reservoir. There are some limitations in well pattern optimization and scheme research. Some of the numerical simulation programs developed by scholars are unable to deal with the actual reservoir models with million-scale grids. In this paper, the key words are skillfully set in the commercial digital simulation software. A set of equivalent characterization methods of starting pressure gradient in reservoir numerical simulation are established. The feasibility of this method is verified by using the limit well spacing theory in reservoir engineering method, and the method is applied to the actual reservoir model of BZ oilfield. It is proved to be of great significance to study reservoir schemes with start-up pressure gradient by guiding the fracturing design of pilot test wells in oil fields.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：中国海洋石油总公司重大专项“渤海典型低孔低渗油藏勘探开发关键技术研究与实践”(CNOOC-KJ-125-ZDXM-07)
【分类号】：TE348

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