油藏储层物性随压力变化规律研究

根据异常高压油藏的特点,以中原油田文13西异常高压区块和渤中25-1油田取心井的岩心覆压孔渗实验为基础,对其孔隙度和渗透率随有效压力的变化规律进行了研究。研究表明孔隙度和渗透率随有效压力的增加而呈非线性减小,特别在有效压力小于20M Pa前减小幅度最大,并建立了以不同有效压力为基准的孔隙度和渗透率随有效压力变化的通用数学模型-幂函数模型。该模型简单实用,结合实际,在渤中25-1油田加以应用。

Research on the variational law between the reservoir quality and pressure

According to the characters of abnormal pressure reservoir,based on the result of burden pressure experiments on the core sample from the Wen13-west abnormal pressure reservoir of Zhong-yuan oil field and BZ25-1 oil field,some research has been made to find the variational law of the porosity and the permeability with the effective pressure.The result shows that the porosity and the permeability take on a tendency towards nonlinear diminish with the increase in the effective pressure,particularly as the eff...