The characteristics of the hydrate-bearing sediments affect the formation and dissociation of gas hydrate in sediments. The mineral composition, their dispersion, and chemical composition of hydrate-bearing sediment samples plays a dominant role in the hydrate stability condition and its economic development. In this paper, the physical properties of hydrate-bearing sediment of India are compared with each other. The sediment samples are taken from the Krishan-Godavari basin (Depth—127.5 and 203.2 mbsf), Mahanadi basin (Depth—217.4 mbsf), and Kerala-Konkan basin (Depth—217.4 mbsf). The saturation of the gas hydrate observed at these sites is between 3 and 50%. Particle size is an important parameter of the sediments because it provides information on the transportation and deposition of sediment and the deposition history. In the present study, we investigated the mineralogy of hydrate-bearing sediments by chemical analysis and X-ray Diffraction. XRD, FTIR, and Raman Spectroscopy distinguished the mineralogical behavior of sediments. Quartz is the main mineral (66.8% approx.) observed in the gas hydrate-bearing sediments. The specific surface area was higher for the sediment sample from the Mahanadi basin, representing the sediments’ dissipation degree. This characterization will give important information for the possible recovery of gas from Indian hydrate reservoirs by controlling the behavior of host sediment. SEM analysis shows the morphology of the sediments, which can affect the mechanical properties of the hydrate-bearing sediments. These properties can become the main parameters to consider for the design of suitable and economic dissociation techniques for gas hydrates formed in sediments.

中文翻译：

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Kerala-Konkan、Krishna-Godavari 和 Mahanadi 盆地含天然气水合物沉积物的物理化学和矿物学特征

含水合物沉积物的特征影响着沉积物中天然气水合物的形成和解离。含水合物沉积物样品的矿物组成、分布和化学成分对水合物稳定条件及其经济发展起着主导作用。本文对印度含水合物沉积物的物理性质进行了比较。沉积物样本取自 Krishan-Godavari 盆地（深度 - 127.5 和 203.2 mbsf）、Mahanadi 盆地（深度 - 217.4 mbsf）和 Kerala-Konkan 盆地（深度 - 217.4 mbsf）。在这些地点观察到的天然气水合物饱和度在 3% 到 50% 之间。粒度是沉积物的一个重要参数，因为它提供有关沉积物的运输和沉积以及沉积历史的信息。在目前的研究中，我们通过化学分析和 X 射线衍射研究了含水合物沉积物的矿物学。XRD、FTIR 和拉曼光谱可以区分沉积物的矿物学行为。石英是在含天然气水合物沉积物中观察到的主要矿物（约 66.8%）。马哈纳迪盆地沉积物样品的比表面积较高，代表沉积物的消散程度。这种表征将为通过控制宿主沉积物的行为从印度水合物储层中回收天然气提供重要信息。SEM 分析显示沉积物的形态，这会影响含水合物沉积物的力学性质。