储层渗透率应力敏感研究现状

Research status of stress sensitivity of reservoir permeability

罗川

LUO Chuan

克拉玛依职业技术学院石油工程系，新疆 克拉玛依 834000

Department of Petroleum Engineering, Karamay Vocational & Technical College, Karamay 834000, China)

石油学界对储层渗透率的应力敏感问题开展了大量研究，但不同学者得到的研究结论差异较大，甚至完全相反，这给油气生产和决策带来了困扰。为此，对国内外研究成果进行了广泛调研，从应力敏感程度评价标准、实验存在的问题、应力敏感探索性实验、实验数据分析、微观机理解释、对产能的影响等6个方面，详细介绍了渗透率应力敏感研究现状。通过调研分析发现：应力敏感的评价指标、敏感程度的划分、实验及数据处理因人而异，亟待建立一套统一的评价标准；有效应力的选用是造成应力敏感评价结果存在差异的重要原因之一；从岩石力学角度进行研究，结合合适的毛细管束模型，从理论上推导出定量计算公式，将有助于揭示渗透率应力敏感的内在规律。

The petroleum academia has done a lot of research on stress sensitivity of reservoir permeability, but the conclusions of different scholars are quite different or even totally opposite, which brings troubles to oil and gas production and decision?鄄making. Therefore, the research results in China and abroad are extensively investigated. The research status of permeability stress sensitivity is introduced in detail from six aspects: stress sensitivity evaluation criteria, experimental problems, exploratory stress sensitivity experiments, experiment data analysis, microscopic mechanism interpretation, and influence on productivity. Through investigation and analysis, it is found that the evaluation index of stress sensitivity, the division of sensitivity degree, the experiment and data processing are different from each other, so it is urgent to establish a unified evaluation standard. The choice of effect stress is the main reason that causes the difference of stress sensitivity. Using rock mechanics and the appropriate capillary bundle model, the quantitative calculation formula is deduced theoretically, which will help reveal the inherent law of permeability stress sensitivity

10.6056/dkyqt201902011