Monitoring horizontal and vertical surface deformation over a hydrocarbon reservoir by PSInSAR
Monitoring horizontal and vertical surface deformation over a hydrocarbon reservoir by PSInSAR
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DOI：
10.3997/1365-2397.2010014
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
H. Klemm;I. Quseimi;F. Novali;A. Ferretti;A. Tamburini
中科院分区：
文献类型：
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作者：
H. Klemm;I. Quseimi;F. Novali;A. Ferretti;A. Tamburini
我们研究利用永久散射体干涉合成孔径雷达 (PSInSAR) 对中东油气藏进行地表变形监测。通过结合两个不同观察角度的数据，可以解开地球表面的水平和垂直变形。我们将 PSInSAR 数据与现有 GPS 网络进行基准测试，发现垂直和水平位移都具有良好的一致性。为了将地表数据与储层联系起来，我们使用解析地质力学模型反演地表变形并获得储层应变。假设线性孔隙弹性，我们将应变与压力损耗联系起来。储层应变的面积范围与储层模拟的预测非常吻合。通过考虑速度梯度图，我们发现了储层主要断层与地面数据之间的有趣关系。我们得出的结论是，地表变形监测和地质力学反演可以提供有关动态储层行为的有价值的信息。
We study surface deformation monitoring over a hydrocarbon reservoir in the Middle East with permanent scatterer interferometric synthetic aperture radar (PSInSAR). By combining data from two different observation angles, it is possible to disentangle horizontal and vertical deformation of the Earth’s surface. We benchmark the PSInSAR data against an existing GPS network and find good agreement in both vertical and horizontal displacements. In order to relate the surface data to the reservoir, we invert the surface deformations using an analytical geomechanical model and obtain reservoir strain. Assuming linear poroelasticity, we relate the strain to pressure depletion. The areal extent of the reservoir strain is in good agreement with predictions from reservoir simulation. By considering velocity gradient maps, we find intriguing relationships between major faults in the reservoir and the surface data. We conclude that surface deformation monitoring and geomechanical inversion can provide valuable information on dynamic reservoir behaviour.