One of the most challenging issues during drilling operations is lost circulation, which can cause several problems that could lead to increasing the non-productive time (NPT) and drilling cost. Wellbore strengthening techniques have been applied as a well-known approach to increase the mud weight window by improving mud cake properties or adding lost circulation materials (LCMs) to the drilling fluid. The success-to-failure ratio of remedial or preventive solutions during the field operation is highly dependent on the appropriate selection of wellbore strengthening strategy. Initial studies, which have often focused on trial and error and operational practices, have not provided a clear understanding of fundamental mechanisms and performance of LCMs in strengthening of a formation. Hence, in the last decades, several analytical and numerical studies, as well as experimental evaluations have been performed by numerous researchers to simulate the fluid loss process and LCM effectiveness. Conducting a comprehensive and well-designed experimental investigation can be a more applicable and cost-effective approach to select proper wellbore strengthening method and recommend the best drilling fluid formulation to treat the loss zone. The aim of this paper is to present an overall review on the various published experimental investigations, to assess the different aspects of lost circulation and wellbore strengthening theory. This extensive literature review collects limitations, advances, and differing opinions from experts. It also broadens the scope for future work and helps in solving industrial problems from an operational point of view.

钻井作业中最具挑战性的问题之一是漏失，这可能会导致几个问题，从而增加非生产时间 (NPT) 和钻井成本。井筒强化技术已作为一种众所周知的方法被应用，通过改善泥饼性质或向钻井液中添加堵漏材料 (LCM) 来增加泥浆重量窗口。现场作业期间补救或预防解决方案的成功与失败率在很大程度上取决于选择适当的井眼加固策略。最初的研究通常侧重于试错和操作实践，并没有清楚地了解 LCM 在加强编队方面的基本机制和性能。因此，在过去的几十年里，许多研究人员已经进行了多项分析和数值研究以及实验评估，以模拟滤失过程和 LCM 有效性。进行全面和精心设计的实验研究可能是选择合适的井筒加固方法并推荐最佳钻井液配方来处理损失区的更适用和更具成本效益的方法。本文的目的是对各种已发表的实验研究进行全面回顾，以评估漏失和井筒加固理论的不同方面。这篇广泛的文献综述收集了专家的局限性、进步和不同意见。它还拓宽了未来工作的范围，并有助于从运营角度解决工业问题。许多研究人员进行了实验评估，以模拟滤失过程和 LCM 的有效性。进行全面和精心设计的实验研究可能是选择合适的井筒加固方法并推荐最佳钻井液配方来处理损失区的更适用和更具成本效益的方法。本文的目的是对各种已发表的实验研究进行全面回顾，以评估漏失和井筒加固理论的不同方面。这篇广泛的文献综述收集了专家的局限性、进步和不同意见。它还拓宽了未来工作的范围，并有助于从运营角度解决工业问题。许多研究人员进行了实验评估，以模拟滤失过程和 LCM 的有效性。进行全面和精心设计的实验研究可能是选择合适的井筒加固方法并推荐最佳钻井液配方来处理损失区的更适用和更具成本效益的方法。本文的目的是对各种已发表的实验研究进行全面回顾，以评估漏失和井筒加固理论的不同方面。这篇广泛的文献综述收集了专家的局限性、进步和不同意见。它还拓宽了未来工作的范围，并有助于从运营角度解决工业问题。