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Unsteady flow in nonlinear fractured reservoirs

机译：非线性裂缝性油藏中的非定常流动

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摘要

A recently developed model is used to investigate flow problems concerning a fractured reservoir. The reservoir is modelled in two ways: 1) as macroscopically isotropic and subject to uniform overall compression; 2) as containing only flat fractures aligned in the horizontal plane which are under the action of a vertical overburden rock pressure. In both cases the reservoir can be elastically deformed as a result of the fractures contracting when the pressure drops in the fluid filling the fractures. The pressure field evolution is analyzed when either bottom-hole pressure or production rate is fixed. The processes of reservoir pressure depletion and recovery are also studied. The results obtained eliminate some limitations inherent in conventional approaches to fractured reservoir filtration and agree well with experimental evidence.
机译：最近开发的模型用于研究与裂缝性储层有关的流动问题。以两种方式对储层进行建模：1）宏观上各向同性，并且受到均匀的整体压缩; 2）只包含在垂直覆岩压力作用下在水平面上排列的扁平裂缝。在这两种情况下，当填充裂缝的流体中的压力下降时，由于裂缝的收缩，储层可以弹性变形。当井底压力或生产率固定时，分析压力场演化。还研究了储层压力的消耗和恢复过程。获得的结果消除了裂缝性储层过滤常规方法固有的一些局限性，并与实验证据很好地吻合。

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