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An Experimental Study for Mechanical Formation Damage

机译:机械地层损伤的实验研究

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This work presents triaxial experiments that were carried out in different stress paths, with measurements of P- and S-wave acoustic velocity and permeability, to evaluate mechanical formation damage. In some reservoirs, large deformations occur during oil production because of the effective stress increase. This may cause permanent damage to the reservoir as the rock structure changes, lowering the permeability and the final oil recovery. The experiments showed that plastic behavior is always present and that a "cap" model may represent the yield region. This methodology allowed a near-wellbore evaluation and permeability investigations using a stress-path concept.
机译:这项工作提出了在不同应力路径上进行的三轴实验,并测量了P波和S波的声速和渗透率,以评估机械地层损伤。在某些油藏中,由于有效应力的增加,在采油过程中会发生大的变形。随着岩石结构的变化,这可能会对储层造成永久性损害,从而降低渗透率和最终采油量。实验表明,塑性行为始终存在,并且“上限”模型可以代表屈服区域。这种方法允许使用应力路径概念进行近井眼评估和渗透率调查。

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