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首页> 外文会议>SPE Western Regional Meeting >Modeling Pore Compressibility Effects in Unconventional Reservoir Performance Analysis: Application to Bakken Formation
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Modeling Pore Compressibility Effects in Unconventional Reservoir Performance Analysis: Application to Bakken Formation

机译：孔隙压缩性效果在非传统水库性能分析中的应用：施用Bakken地层

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Unconventional reservoirs consist of matrix, micro-fractures, and macro-fractures. There is a significant difference between stress-dependent deformation of matrix rock and the fracture-containing reservoir frame. These differences are great enough to affect the long-term production performance of reservoir. Thus, accurate representation and modeling of such diverse characteristics are needed to predict reservoir performance. Changing reservoir pore pressure during production causes decrease in porosity and permeability and deforms the pore geometry. Thus, in mathematical modeling, reduction in pore volume is a rock deformation issue including the ever-changing pore compressibility. Typically, coupled geomechanics and flow simulation models do not account for such details; however, in this paper, we used in-house multi-phase dual-porosity model to show the effect and significance of compaction drive on production performance of a Bakken reservoir. We have observed that the energy provided by the reservoir compaction increases cumulative fluid production, and numerical models that has constant compressibility values in their transport equations underestimates the cumulative production. Our modeling results indicate that the energy provided by the reservoir compaction increases cumulative fluid production by eleven percent for the Bakken example. Thus, using the results of this paper, we demonstrate the effect of rock elastic properties and stress-dependent porosity and permeability on reservoir long-term performance.
机译：非常规储层由基质，微骨折和宏观裂缝组成。基质岩石的应力依赖性变形与含骨折储存器框架之间存在显着差异。这些差异足以影响水库的长期生产性能。因此，需要准确的表示和建模这种多种特征来预测储层性能。在生产过程中改变储层孔隙压力会导致孔隙率和渗透率降低，使孔几何形状变形。因此，在数学建模中，降低孔体积是一种岩石变形问题，包括不断变化的孔压缩性。通常，耦合的地质力学和流量仿真模型不考虑这些细节;然而，在本文中，我们使用内部的多相双孔隙度模型来表明压实驱动对Bakken水库生产性能的影响和意义。我们已经观察到，储层压实提供的能量增加了累积的流体生产，并且在其运输方程中具有恒定可压缩性值的数值模型低估了累积的生产。我们的建模结果表明，储层压实提供的能量增加了Bakken示例的11％的累积流体产量。因此，使用本文的结果，我们证明了岩弹性性能和应力依赖性孔隙率和渗透性对水库长期性能的影响。

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