The primary cement of oil and gas wells is prone to fail under downhole conditions. Thus, a remedial operation must be conducted to restore the wellbore integrity and provides zonal isolation. Many types of materials are currently used and/or have the potential to be employed in wellbore integrity applications, including, but not limited to, conventional Portland cement, microfine and ultrafine cement, thermoset materials, and thermoplastic materials. In this study, several types of materials were selected for evaluation: (1) conventional Portland cement, which is the most widely used in remedial operations in the petroleum industry, (2) polymer resin, which is one of the most recent technologies being applied successfully in the field, (3) polymer solutions, and (4) polymer gel, which is a semisolid material that has shown potential in conformance control applications. This work addresses injectivity and the parameters that affect the injectivity of these materials, which to the authors' best knowledge have not been addressed comprehensively in the literature. The results of this study demonstrate the effects of several factors on the injectivity of the sealants: void size, viscosity of the sealant, injection flow rate, and heterogeneity of the void. The results also promote the use of solids-free sealants, such as epoxy resin, in wellbore remedial operations because epoxy resin behaved like Newtonian fluid and can therefore be injected into very small voids with a minimum pressure requirement.

油气井的初级水泥在井下条件下容易失效。因此，必须进行补救操作以恢复井筒完整性并提供区域隔离。许多类型的材料当前用于和/或有潜力用于井筒完整性应用，包括但不限于常规波特兰水泥、微细和超细水泥、热固性材料和热塑性材料。在这项研究中，选择了几种类型的材料进行评估：(1) 常规硅酸盐水泥，这是石油工业补救操作中使用最广泛的，(2) 聚合物树脂，这是最新应用的技术之一在该领域取得成功，(3) 聚合物溶液，和 (4) 聚合物凝胶，这是一种在一致性控制应用中显示出潜力的半固体材料。这项工作解决了注入性和影响这些材料注入性的参数，据作者所知，文献中尚未全面解决这些问题。这项研究的结果证明了几个因素对密封剂注入性的影响：空隙尺寸、密封剂的粘度、注入流速和空隙的不均匀性。结果还促进了无固体密封剂（如环氧树脂）在井眼修复作业中的使用，因为环氧树脂的行为类似于牛顿流体，因此可以以最低的压力要求注入非常小的空隙中。就作者所知，这在文献中尚未得到全面解决。这项研究的结果证明了几个因素对密封剂注入性的影响：空隙尺寸、密封剂的粘度、注入流速和空隙的不均匀性。结果还促进了无固体密封剂（如环氧树脂）在井眼修复作业中的使用，因为环氧树脂的行为类似于牛顿流体，因此可以以最低的压力要求注入非常小的空隙中。就作者所知，这在文献中尚未得到全面解决。这项研究的结果证明了几个因素对密封剂注入性的影响：空隙尺寸、密封剂的粘度、注入流速和空隙的不均匀性。结果还促进了无固体密封剂（如环氧树脂）在井眼修复作业中的使用，因为环氧树脂的行为类似于牛顿流体，因此可以以最低的压力要求注入非常小的空隙中。