致密油气储层基质岩心静态渗吸实验及机理

发布时间：2018-10-13 16:31

【摘要】：致密油气藏已经成为非常规油气领域的开发重点。渗吸作用作为致密油气渗流机理的重要内容,可以有效地提高致密油气藏的采收率,但目前这方面的研究较少。选取中国典型致密油气储层基质岩心,进行不同条件下的渗吸实验。对实验现象与实验结果进行深入分析,提出新的致密油气储层基质岩心渗吸机理——层渗吸理论,即渗吸是从岩心表层开始逐层向岩心内部进行的。根据修正质量法计算渗吸效率的公式得到准确的室内渗吸实验数据,并将数据标定为实际地层尺度。结果表明,致密油气储层基质岩心在地层条件下的油水渗吸效率为12%~18%,渗吸速度数量级为1×10~(-4)cm/min。应用渗吸作用开发致密油气需要与其他开发方式相结合,才能提高致密油气产量的最终效果。
[Abstract]:Tight reservoirs have become the focus of unconventional oil and gas development. As an important content of tight oil-gas percolation mechanism, permeability and absorption can effectively improve the oil and gas recovery, but there is little research on this aspect. The permeability and suction experiments were carried out under different conditions by selecting the matrix core of typical dense oil and gas reservoirs in China. Based on the analysis of experimental phenomena and experimental results, a new mechanism of core permeability in dense oil and gas reservoirs is put forward, that is, the theory of permeation and suction is carried out from the surface layer of the core to the inner layer of the core. According to the formula of the modified mass method to calculate the permeation efficiency, the accurate indoor permeation experiment data are obtained, and the data are calibrated as the actual stratigraphic scale. The results show that the permeability efficiency of matrix core in tight oil and gas reservoir is 12 ~ (-4) cm/min. and the permeability rate is 1 脳 10 ~ (-4) cm/min.. In order to improve the final effect of dense oil and gas production, it is necessary to combine with other development methods to develop dense oil and gas by permeation and absorption.
【作者单位】：中国石油大学(北京)石油工程教育部重点实验室;中国石油新疆油田分公司准东懫油厂;
【基金】：国家“973”计划“陆相致密油高效开发基础研究”(2015CB250904) 国家自然科学基金项目“致密油储层基质渗吸规律及原油动用机理研究”(51574257)
【分类号】：TE311

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