吴大卫;邸元;李红凯;黄孝特;

• 1:北京大学工学院

• 2:中国石化石油勘探开发研究院

摘要(Abstract)：

在实际油藏开采过程中,储层区域发生地下流体渗流,岩土力学平衡的影响范围大于渗流的计算区域,并影响储层的上覆盖层和下部地层。在流固耦合油藏数值模拟中,地下流体渗流和岩土力学的计算通常采用相同的计算区域,并限定在储层范围内,未考虑完整的应力计算区域,造成计算结果存在偏差。采用改进的有限元—有限体积混合方法,对地下流体的渗流和岩土的力学平衡分别采用不同的计算区域和不同的网格密度进行计算,分析渗流—应力耦合数值计算中计算区域的选取对计算结果的影响。规则储层与背斜圈闭储层算例数值模拟结果表明:应力计算区域的选取影响计算结果,计算结果偏差与非储层区域材料的参数相关,其中拱效应是计算结果出现偏差的主要原因。该结果为流固耦合油藏数值模拟提供指导。

关键词(KeyWords)：多孔介质;有限元法;有限体积法;应力场;渗流—应力耦合;计算区域

Abstract:

Keywords:

基金项目(Foundation):国家自然科学基金项目(51674010);; 国家科技重大专项(2016ZX05014)

作者(Author):吴大卫;邸元;李红凯;黄孝特;

Email:

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