{"title":"神狐地区粘土粉砂水合物储层产能影响多相渗流参数敏感性分析","authors":"Yaobin Li, Xin Xin, Tianfu Xu, Yingqi Zang, Huixing Zhu, Yilong Yuan","doi":"10.1111/1755-6724.15106","DOIUrl":null,"url":null,"abstract":"Natural gas hydrate (NGH) is an important future resource in the 21st century and strategic resource with potential for commercial development in the third energy transition. It is of great significance to accurately predict the productivity of hydrate bearing sediments (HBS). The multi–phase seepage parameters of HBS include permeability, porosity which is closely related to permeability, and hydrate saturation which has a direct impact on hydrate content. Existing researches show that these multi–phase seepage parameters have a great impact on HBS productivity. Permeability directly affects the transmission of pressure–drop and discharge of methane gas, porosity and initial hydrate saturation affect the amount of hydrate decomposition and transmission process of pressure–drop, and also indirectly affect temperature variation of the reservoir. Therefore, in this paper, considering the spatial heterogeneity of multi–phase seepage parameters, a depressurization production model with layered heterogeneity was established based on the clayey silt hydrate reservoir at W11 station in Shenhu Sea area. And then the Tough+Hydrate software was used to calculate, the process of gas production and seepage parameters evolution under different multi–phase seepage parameters were obtained, and the sensitivity analysis of the parameters affecting the clayey silt hydrate reservoir productivity was conducted. The research found that: (a) The HBS model with layered heterogeneity can better describe the transmission process of pressure and thermal compensation mechanism of hydrate reservoir. (b) Considering the multi–phase seepage parameters heterogeneity, the influence degrees of the parameters on HBS productivity was permeability, porosity and initial hydrate saturation in order from large to small, and the influence of permeability was significantly greater than that of other parameters. (c) The production potential of the clayey silt reservoir should not be determined only by the hydrate content or seepage capacity, but also by the comprehensive effect of the two. (d) Time scales need to be concerned when studying the effects of changes in multi–phase seepage parameters on HBS productivity.","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Sensitivity Analysis of Multi–phase Seepage Parameters Affecting the Clayey Silt Hydrate Reservoir Productivity in the Shenhu Area\",\"authors\":\"Yaobin Li, Xin Xin, Tianfu Xu, Yingqi Zang, Huixing Zhu, Yilong Yuan\",\"doi\":\"10.1111/1755-6724.15106\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Natural gas hydrate (NGH) is an important future resource in the 21st century and strategic resource with potential for commercial development in the third energy transition. It is of great significance to accurately predict the productivity of hydrate bearing sediments (HBS). The multi–phase seepage parameters of HBS include permeability, porosity which is closely related to permeability, and hydrate saturation which has a direct impact on hydrate content. Existing researches show that these multi–phase seepage parameters have a great impact on HBS productivity. Permeability directly affects the transmission of pressure–drop and discharge of methane gas, porosity and initial hydrate saturation affect the amount of hydrate decomposition and transmission process of pressure–drop, and also indirectly affect temperature variation of the reservoir. Therefore, in this paper, considering the spatial heterogeneity of multi–phase seepage parameters, a depressurization production model with layered heterogeneity was established based on the clayey silt hydrate reservoir at W11 station in Shenhu Sea area. And then the Tough+Hydrate software was used to calculate, the process of gas production and seepage parameters evolution under different multi–phase seepage parameters were obtained, and the sensitivity analysis of the parameters affecting the clayey silt hydrate reservoir productivity was conducted. The research found that: (a) The HBS model with layered heterogeneity can better describe the transmission process of pressure and thermal compensation mechanism of hydrate reservoir. (b) Considering the multi–phase seepage parameters heterogeneity, the influence degrees of the parameters on HBS productivity was permeability, porosity and initial hydrate saturation in order from large to small, and the influence of permeability was significantly greater than that of other parameters. (c) The production potential of the clayey silt reservoir should not be determined only by the hydrate content or seepage capacity, but also by the comprehensive effect of the two. (d) Time scales need to be concerned when studying the effects of changes in multi–phase seepage parameters on HBS productivity.\",\"PeriodicalId\":7095,\"journal\":{\"name\":\"Acta Geologica Sinica ‐ English Edition\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2023-08-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Geologica Sinica ‐ English Edition\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1111/1755-6724.15106\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geologica Sinica ‐ English Edition","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1111/1755-6724.15106","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Sensitivity Analysis of Multi–phase Seepage Parameters Affecting the Clayey Silt Hydrate Reservoir Productivity in the Shenhu Area
Natural gas hydrate (NGH) is an important future resource in the 21st century and strategic resource with potential for commercial development in the third energy transition. It is of great significance to accurately predict the productivity of hydrate bearing sediments (HBS). The multi–phase seepage parameters of HBS include permeability, porosity which is closely related to permeability, and hydrate saturation which has a direct impact on hydrate content. Existing researches show that these multi–phase seepage parameters have a great impact on HBS productivity. Permeability directly affects the transmission of pressure–drop and discharge of methane gas, porosity and initial hydrate saturation affect the amount of hydrate decomposition and transmission process of pressure–drop, and also indirectly affect temperature variation of the reservoir. Therefore, in this paper, considering the spatial heterogeneity of multi–phase seepage parameters, a depressurization production model with layered heterogeneity was established based on the clayey silt hydrate reservoir at W11 station in Shenhu Sea area. And then the Tough+Hydrate software was used to calculate, the process of gas production and seepage parameters evolution under different multi–phase seepage parameters were obtained, and the sensitivity analysis of the parameters affecting the clayey silt hydrate reservoir productivity was conducted. The research found that: (a) The HBS model with layered heterogeneity can better describe the transmission process of pressure and thermal compensation mechanism of hydrate reservoir. (b) Considering the multi–phase seepage parameters heterogeneity, the influence degrees of the parameters on HBS productivity was permeability, porosity and initial hydrate saturation in order from large to small, and the influence of permeability was significantly greater than that of other parameters. (c) The production potential of the clayey silt reservoir should not be determined only by the hydrate content or seepage capacity, but also by the comprehensive effect of the two. (d) Time scales need to be concerned when studying the effects of changes in multi–phase seepage parameters on HBS productivity.
期刊介绍:
Acta Geologica Sinica mainly reports the latest and most important achievements in the theoretical and basic research in geological sciences, together with new technologies, in China. Papers published involve various aspects of research concerning geosciences and related disciplines, such as stratigraphy, palaeontology, origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry, geophysics, geology of mineral deposits, hydrogeology, engineering geology, environmental geology, regional geology and new theories and technologies of geological exploration.