非线性渗流启动压力梯度确定方法研究

非线性渗流的研究已成为人们关注的重点,其中对于启动压力梯度的确定方法尚没有统一的标准与规范,为了能够改善这一现状,并且能够为以后的启动压力梯度研究提供更可靠的依据,通过分析近些年来国内外非线性渗流启动压力梯度的确定方法和技术的基础之上,总结了在此过程中存在的问题,并提出了初步的解决方案。其中,分别以最小启动压力梯度与拟启动压力梯度这两种不同定义下的启动压力梯度进行分析和总结其确定方法,包括室内的物理模拟直接测量与建立数学模型间接求解等。这为以后研究非常规油藏渗流规律研究奠定了基础,进一步为提高油藏采收率做出贡献。

Research of nonlinear seepage start-up pressure gradient determine method

Unconventional reservoir as heavy oil and low permeability reservoirs have different seepage rule with conventional reservoir,there exists start-up pressure gradient and seepage rule does not comply with the darcy's law,the correct understanding and measuring start-up pressure gradient on the exploitation of unconventional reservoir has an important significance.In recent years,on the analysis of the nonlinear seepage minimum start -up pressure gradient and proposed a method to determine the start-up pressure gradient and technical basis,summarized in the process existing problems, and put forward some solutions.The work for the future unconventional reservoir seepage rule research laid the foundation,further improve oil recovery.