论文部分内容阅读
了解天然气水合物的微观结构特征对水合物资源勘探和评价具有重要意义。采用显微激光拉曼光谱技术,对青海聚乎更钻探区内DK8-19、DK11-14和DK12-13等3个站位共9个天然气水合物岩心样品进行了分析测试,探讨了钻探区天然气水合物的拉曼光谱特征。结果表明,青海聚乎更钻探区天然气水合物广泛分布,垂直方向在126.1~322.2m范围内不连续分布,不同钻孔、不同埋深水合物样品的拉曼光谱特征基本一致,初步判断为Ⅱ型结构水合物,且为多元气体水合物。水合物客体除甲烷、乙烷、丙烷及丁烷等烷烃外,普遍含有氮气组分。此外,在DK8-19站位埋深为126.1 m样品中发现水合物相中硫化氢组分的拉曼信号,这说明特定区域内可能存在硫化氢气体且形成了水合物。聚乎更钻探区水合物样品拉曼光谱特征为冻土区天然气水合物成藏与分布规律研究提供了新的启示。
Understanding the microstructure characteristics of gas hydrate is of great significance to the exploration and evaluation of hydrate resources. A total of nine gas hydrate core samples at three sites of DK8-19, DK11-14 and DK12-13 in the polygam drilling area of Qinghai Province were analyzed and tested by using the laser Raman spectroscopy. The drilling area Raman Spectra of Natural Gas Hydrate. The results show that the gas hydrate in the polygam drilling area of Qinghai Province is widely distributed and the vertical distribution is discontinuous in the range of 126.1 ~ 322.2 m. The Raman spectra of hydrate samples with different boreholes and buried depths are basically the same, Type structure hydrate, and is a multi-gas hydrate. In addition to methane hydrate objects methane, ethane, propane and butanes and other alkanes, nitrogen components generally contain. In addition, a Raman signal of the hydrogen sulfide component in the hydrate phase was found in a sample of 126.1 m at DK8-19, indicating the possible presence of hydrogen sulfide gas and the formation of hydrates in a given area. The Raman spectra of hydrate samples in the polygam drilling area provide new revelations for the study of the accumulation and distribution of gas hydrates in permafrost areas.