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A Preliminary Study of the Gas Hydrate Stability Zone in the South China Sea 被引量:22

A Preliminary Study of the Gas Hydrate Stability Zone in the South China Sea
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摘要 Based on the analysis of sea-bottom temperature and geothermal gradient, andby means of the phase boundary curve of gas hydrate and the sea-bottom temperature versus waterdepth curve in the South China Sea, this paper studies the temperature and pressure conditions forgas hydrate to keep stable. In a marine environment, methane hydrate keeps stable at water depthsgreater than 550 min the South China Sea. Further, the thickness of the gas hydrate stability zonein the South China Sea was calculated by using the phase boundary curve and temperature-depthequations. The result shows that gas hydrate have a better perspective in the southeast of theDongsha Islands. the northeast of the Xisha Islands and the north of the Nansha Islands for thickerstability zones. Based on the analysis of sea-bottom temperature and geothermal gradient, andby means of the phase boundary curve of gas hydrate and the sea-bottom temperature versus waterdepth curve in the South China Sea, this paper studies the temperature and pressure conditions forgas hydrate to keep stable. In a marine environment, methane hydrate keeps stable at water depthsgreater than 550 min the South China Sea. Further, the thickness of the gas hydrate stability zonein the South China Sea was calculated by using the phase boundary curve and temperature-depthequations. The result shows that gas hydrate have a better perspective in the southeast of theDongsha Islands. the northeast of the Xisha Islands and the north of the Nansha Islands for thickerstability zones.
出处 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2002年第4期423-428,共6页 地质学报(英文版)
基金 the Marine 863 Project(Grant 820-Exploration-5).
关键词 South China Sea gas hydrate stability zone geothermal gradient sea-bottomtemperature South China Sea gas hydrate stability zone geothermal gradient sea-bottomtemperature
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