Reconciling the Long-Term Relationship Between Reservoir Pore Pressure Depletion and Compaction in the Groningen Region
Reconciling the Long-Term Relationship Between Reservoir Pore Pressure Depletion and Compaction in the Groningen Region
复制标题
协调格罗宁根地区储层孔隙压力损耗与压实之间的长期关系
DOI：
10.1029/2018jb016801
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发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Smith J
中科院分区：
文献类型：
--
作者：
Smith J
位于荷兰东北部的格罗宁根天然气藏是西欧最大的天然气藏。由于天然气生产，在该地区检测到可测量的沉降和地震活动，这归因于储层孔隙压力耗尽引起的变形。我们使用基于主成分分析的反演方法，结合联合收割机各种光学水准测量、干涉合成孔径雷达和全球定位系统数据，研究地表位移历史，以更好地约束储层压实和沉降历史。然后将生成的压实模型与先前的压力衰竭模型结合使用，以确定储层单轴压缩系数。单轴压缩系数的最佳拟合模型是与时间无关但空间可变的。缺乏证据表明，任何显着的时间延迟之间的变化，消耗和压实速率支持一个瞬时的孔隙弹性储层响应。在最大压实应变下不存在非线性屈服，这表明滞弹性变形是储层压实的一小部分。
The Groningen gas reservoir, situated in the northeast of the Netherlands is western Europe's largest gas reservoir. Due to gas production measurable subsidence and seismicity has been detected across this region, attributed to the deformations induced by reservoir pore pressure depletion. We investigate the surface displacement history using a principal component analysis‐based inversion method to combine a diverse set of optical leveling, interferometric synthetic aperture radar, and Global Positioning System data to better constrain reservoir compaction and subsidence history. The generated compaction model is then used in combination with prior pressure depletion models to determine a reservoir uniaxial compressibility. The best fitting model of uniaxial compressibility is time independent but spatially variable. The absence of evidence for any significant time delay between changes in depletion and compaction rates supports an instantaneous poroelastic reservoir response. The absence of nonlinear yielding at the largest compaction strains suggests that anelastic deformations are a minor part of reservoir compaction.