Abstract A laboratory study of inelastic deformation and localization was conducted to evaluate microseismicity and fracture in fluid-saturated rock. Plane strain compression experiments were performed on oil- and water-saturated Berea sandstone under dry, drained, undrained, and quasi-unjacketed conditions. Parameters associated with the elastic and inelastic material response were accurately measured and used in a constitutive model to predict localization of deformation under the drained and undrained conditions. Acoustic emission (AE) activity was recorded and the onset of inelastic response in fluid-saturated rock, similar to dry rock, coincided with an increase in AE rate. Fracture initiation and propagation were successfully monitored by AE locations. Clustering of AE events and the start of inhomogeneous deformation inferred from displacement measurements are shown to be well correlated with the model prediction of the onset of localized deformation under various rock-fluid interaction conditions.

中文翻译：

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流体饱和砂岩变形局部化

摘要 进行了非弹性变形和定位的实验室研究，以评估流体饱和岩石中的微地震和裂缝。在干燥、排水、不排水和准无夹套条件下对油和水饱和的 Berea 砂岩进行平面应变压缩实验。与弹性和非弹性材料响应相关的参数被准确测量并用于本构模型，以预测排水和不排水条件下变形的局部化。记录了声发射 (AE) 活动，并且与干岩石相似的流体饱和岩石中非弹性响应的开始与 AE 速率的增加相吻合。AE 位置成功地监测了裂缝的起始和扩展。