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本文提出一种将地质、地震、地球化学分析相结合的方法 ,以研究海区天然气水合物的成藏条件 ,首先用物源、构造、沉积和地温等资料进行地质分析 ,确定海区天然气水合物成藏的地质条件 ;然后根据对水合物的地震属性 (BSR ,AVO ,BZ等 )分析和正演模拟研究 ,预测水合物及其游离气的存在 ,结合地质条件 ,圈定出水合物成藏的有利区带 ;最后结合对水合物主要成分 (甲烷及烃类等 )的地球化学异常分析 ,对研究区天然气水合物成藏的远景作出评价 .野外实践结果表明 ,这种综合研究方法是有效可行的 ,为海区天然气水合物勘探提供了一种新的研究途径
This paper presents a method of combining geologic, seismic and geochemical analyzes to study the hydrocarbon accumulation conditions of natural gas hydrate in the sea. Firstly, the geological analysis is carried out by using provenance, structure, sedimentation and geotemperature to determine whether the gas hydrate Based on the analysis of seismic attributes of hydrates (BSR, AVO, BZ, etc.) and forward modeling studies, the existence of hydrate and its free gas is predicted. Based on the geological conditions, the favorable area for hydrate accumulation is delineated Finally, combining with the geochemical anomaly analysis of the main components of hydrate (such as methane and hydrocarbons), the prospect of natural gas hydrate accumulation in the study area is evaluated.Experimental results show that this comprehensive method is effective and feasible, It provides a new approach for the exploration of gas hydrate in the sea area