Geomechanical properties of Groningen Reservoir, Netherlands, from deformation and seismicity.

从格罗宁根大气田开采天然气提出了重大的地面工程挑战。随着水库的压实和上覆区域的沉降，诱发的地震活动增加。这是一个人口稠密的地区，因此社会重要性和利益是显着的。天然气开采记录将与来自卫星干涉合成孔径雷达的变形信息相结合，在水库上方的GPS测量，和微震活动记录使用一个新的阵列的59个地震仪在钻孔。将对数据集进行分析，以约束粘性和孔隙弹性变形的贡献以及地震和抗震变形的划分。这将使我们能够对地下储层的地质力学特性进行建模，对诱发地震活动的可能大小和位置进行基于物理的约束，并更好地了解弹性能量如何在地震事件中积累和释放。

Extraction of gas from the large Groningen field presents significant ground engineering challenges. As the reservoir compacts and the overlying region subsides induced seismicity is increasing. This is a densely populated area so the societal importance and interest is significant.The gas extraction record will be combined with information on deformation derived from satellite InSAR, GPS measurements above the reservoir, and microseismicity recorded using a new array of 59 seismometers in boreholes. The dataset will be analysed to constrain the contribution of viscous and poro-elastic deformation and the partitioning of seismic and aseismic deformation. This will allow us to model the geomechanical properties of the subsurface reservoir, place physics-based constraints on the likely size and location of induced seismicity, and better understand how elastic energy builds up and is released in seismic events.