天然气水合物发育的构造背景分析Tectonic Settings Analysis of Gas Hydrate Deposits Development
王健;邱文弦;赵俐红;
摘要(Abstract):
大量的钻孔资料和地震剖面显示主动大陆边缘的增生楔和被动大陆边缘的俯冲-增生楔、断裂-褶皱系、底辟构造或泥火山、滑塌构造、海底扇、"麻坑"构造和陆地多年冻土区等多种地质构造背景是形成天然气水合物的有利场所,可形成构造圈闭型天然气水合物矿藏。这些地质构造背景一方面大多是深部热成因气、生物成因气或混合成因气体或流体向上运移到海底的通道,形成天然气水合物矿藏;另一方面也可能造成天然气水合物的温压环境改变,致使天然气水合物分解。海底滑塌亦可能是天然气水合物分解所致,是潜在的地质灾害。
关键词(KeyWords): 天然气水合物;构造背景;大陆边缘;流体运移
基金项目(Foundation): 国家海洋局第二海洋研究所基本科研业务费专项(JB0701);; 山东省教育厅科技计划项目(J08LB53);; 浙江省博士后科研项目择优资助项目
作者(Author): 王健;邱文弦;赵俐红;
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