琼东南盆地南部隆起带天然气水合物赋存特征分析

天然气水合物是21世纪最具潜力的接替煤炭、石油和天然气的新型洁净能源之一。我国南海蕴藏着丰富的水合物资源,目前已在南海北部陆坡神狐、东沙、海马区发现丰富的水合物资源。本文分析了琼东南盆地南部隆起带天然气水合物赋存的地质条件,开展了地球物理资料的分析与海底反射(BSR)识别,计算了水合物热动力学稳定带厚度。研究表明,琼东南盆地南部隆起带具备水合物赋存的地质条件,渗漏构造发育,游离气丰富,BSR表现为强振幅、不连续等特征,水合物稳定带厚度大,具有较大的天然气水合物资源潜力。

The occurrence of the gas hydrates in the southern uplift zone of the Qiongdongnan Basin

Gas hydrates as a new type of clean energy resources are expected to have the great potential to replace coal, oil and natural gas in the 21st century. The South China Sea abounds in gas hydrate resources. Up to now, abundant gas hydrate resources have been explored in the Shenhu, Dongsha and Haima areas on the northern slope of the South China Sea. The present paper deals with geological conditions for the occurrence of the gas hydrates, recognition of bottom simulating reflection (BSR)from the geophysical profiles and calculation of the thickness of gas hydrate stability zones in the southern uplift zone of the Qiongdongnan Basin. The findings show that the southern uplift zone of the Qiongdongnan Basin is conspicuous by developed fluid leakage structures, plentiful free gas, discontinuous and strong amplitudes of bottom simulating reflection, and tremendous thickness of the gas hydrate stability zones, and thus will be highly prospective for the exploration of the gas hydrate resources in the study area.