Fracture-filling hydrate constitutes a pivotal component within the global hydrate reserves and serve as a significant focal point for hydrate exploration and development. However, the understanding of the formation mechanisms and geophysical properties of fracture-filling hydrate in sediments remains unclear. This review seeks to bridge this knowledge gap by comprehensively examining the formation mechanisms of fracture-filling hydrate from both micro-sedimentary and geological reservoir perspectives. It delves into various aspects of field tests, including seismic and logging, as well as laboratory tests covering acoustic properties, permeability, thermal properties, electrical resistivity, and mechanical properties. It aims to shed light on the challenges associated with the characteristics of fracture-filling hydrate reservoirs and their geophysical properties while proposing potential solutions, and emphasizes the urgency of identifying the formation patterns of fracture-filling hydrate and estimating resource volumes. Furthermore, the review emphasizes the importance of collaborative geophysical characterization testing for fracture-filling hydrate as a crucial step in addressing this challenge. It advocates for fostering international cooperation for global data integration and sharing as a viable solution to advance our understanding and management of these valuable resources.

中文翻译：

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主沉积物裂缝填充气水合物的形成机理及地球物理性质综合研究综述


裂缝填充水合物构成了全球水合物储量的关键组成部分，是水合物勘探和开发的重要焦点。然而，对沉积物中裂缝填充水合物的形成机制和地球物理特性的理解仍不清楚。本文试图通过从微沉积和地质储层的角度全面研究裂缝充填水合物的形成机制来弥合这一知识空白。它深入研究了现场测试的各个方面，包括地震和测井，以及涵盖声学特性、磁导率、热特性、电阻率和机械特性的实验室测试。它旨在阐明与裂缝填充水合物储层特征及其地球物理特性相关的挑战，同时提出潜在的解决方案，并强调确定裂缝填充水合物的形成模式和估计资源量的紧迫性。此外，该综述强调了裂缝填充水合物的协作地球物理表征测试的重要性，这是应对这一挑战的关键步骤。它倡导促进全球数据集成和共享的国际合作，作为促进我们对这些宝贵资源的理解和管理的可行解决方案。