页岩气多场耦合渗透率计算模型

发布时间：2018-06-30 09:12

本文选题：页岩气 + 渗透率　；参考：《特种油气藏》2017年02期

【摘要】：为表征扩散、应力敏感、基质收缩和吸附层对页岩气渗透率的影响,通过加权系数耦合过渡扩散和努森扩散,建立了扩散渗透率数学模型,并通过实验进行验证,同时分析了基质收缩、应力敏感、不同孔径页岩气吸附层厚度对渗透率的影响。研究结果表明,建立的页岩气渗透率模型可以有效表征不同传输阶段的扩散,避免了单独使用努森扩散所带来的渗透率偏大等问题,可以更全面地描述多物理场影响的页岩气传输。该研究成果对页岩气的开发具有一定的借鉴意义。
[Abstract]:In order to characterize the effects of diffusion, stress sensitivity, matrix shrinkage and adsorption layer on shale gas permeability, a mathematical model of diffusion permeability was established by coupling the diffusion coefficient with the transition diffusion and Knudsen diffusion, and was verified by experiments. At the same time, the effects of matrix shrinkage, stress sensitivity and the thickness of different pore size shale gas adsorption layer on permeability are analyzed. The results show that the established shale gas permeability model can effectively characterize the diffusion in different transport stages, and avoid the problem of large permeability caused by the alone use of Knudsen diffusion. A more comprehensive description of shale gas transport under the influence of multiple physical fields can be obtained. The research results have some reference significance for shale gas development.
【作者单位】：陕西延长石油(集团)有限责任公司;中国石油长庆油田分公司;
【基金】：国家高技术研究发展计划(“863”计划)“页岩气钻完井及储存评价与产能预测技术研究”(2013AA064501) 陕西省科技统筹创新工程计划“陆相页岩气资源地质研究与勘探开发关键技术攻关”(2012KTZB03-01-01)
【分类号】：TE31

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