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海洋天然气水合物发育顶界的模拟计算

DOI: 10.6038/cjg20140225, PP. 618-627

Keywords: 硫酸根浓度剖面,甲烷-硫酸根界面,甲烷通量,水合物顶界,数值模型

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Abstract:

天然气水合物顶界的确定对于其资源评价十分重要,但目前还没有很好的方法来确定.本文利用在甲烷-硫酸根(SMI)界面硫酸根与甲烷所消耗的量相等和水-天然气水合物二相体系甲烷溶解度模型,建立了水合物顶界埋深计算的数学模型,并考虑硫酸根氧化有机质和微生物原位甲烷生成的影响.计算的ODP1245和IODP1327站位水合物顶界埋深分别为53mbsf和83mbsf,与钻探获得的水合物顶界埋深相吻合.

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