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- W4317491844 endingPage "101540" @default.
- W4317491844 startingPage "101540" @default.
- W4317491844 abstract "Accurate quantification of the gas hydrate content in the deep sea is useful for assessing the resource potential and understanding the role of gas hydrates in the global carbon cycle. Resistivity logging data combined with Archie's equation are often used to calculate gas hydrate saturation, but the reliability is dependent on the rationality of the empirical parameter cementation factor and saturation index. At present, an increasing number of fine-grained hydrate-rich sediment regions have been discovered worldwide through drilling efforts, and the reservoir types and hydrate distribution are diverse, which differs greatly from that of coarse-grained reservoirs of hydrate-bearing sediment. This results in vertical variations in m and n through stratigraphy. At present, the saturation evaluation effect of these reservoirs cannot be improved. In this work, a theory for the determination of the cementation factor and saturation index was first proposed to obtain reliable and variable values of the empirical parameters. Then, a hydrate saturation evaluation technique with variables m and n was formed based on the well logging data. This technique was used to evaluate complex fine-grained hydrate-bearing reservoirs in several regions worldwide. It was found that the highest n could be 16, and the log calculation results were more consistent with the core hydrate saturation. Additionally, the cause of the excessively high n values was explained from physical principles, and the result was verified with actually well log data. In future evaluations of the amount of hydrate resources in fine-grained sediment reservoirs worldwide, new saturation estimation methods should be taken into account to advance hydrate research." @default.
- W4317491844 created "2023-01-20" @default.
- W4317491844 creator A5020543183 @default.
- W4317491844 creator A5029340105 @default.
- W4317491844 creator A5066862504 @default.
- W4317491844 creator A5073555454 @default.
- W4317491844 date "2023-07-01" @default.
- W4317491844 modified "2023-10-14" @default.
- W4317491844 title "Saturation evaluation for fine-grained sediments" @default.
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