现代地质
現代地質
현대지질
Geoscience
2015年
5期
1180-1188
,共9页
孟庆国%刘昌岭%李承峰%贺行良%王菲菲%卢振权%怀军%李永红%王伟超
孟慶國%劉昌嶺%李承峰%賀行良%王菲菲%盧振權%懷軍%李永紅%王偉超
맹경국%류창령%리승봉%하행량%왕비비%로진권%부군%리영홍%왕위초
聚乎更钻探区%天然气水合物%显微激光拉曼光谱%永久冻土区%结构特征
聚乎更鑽探區%天然氣水閤物%顯微激光拉曼光譜%永久凍土區%結構特徵
취호경찬탐구%천연기수합물%현미격광랍만광보%영구동토구%결구특정
Juhugeng drilling area%natural gas hydrate%laser micro-Raman spectroscopy%permafrost area%structure characteristic
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126.1～322.2 m 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。
瞭解天然氣水閤物的微觀結構特徵對水閤物資源勘探和評價具有重要意義。採用顯微激光拉曼光譜技術，對青海聚乎更鑽探區內 DK8-19、DK11-14和 DK12-13等3箇站位共9箇天然氣水閤物巖心樣品進行瞭分析測試，探討瞭鑽探區天然氣水閤物的拉曼光譜特徵。結果錶明，青海聚乎更鑽探區天然氣水閤物廣汎分佈，垂直方嚮在126.1～322.2 m 範圍內不連續分佈，不同鑽孔、不同埋深水閤物樣品的拉曼光譜特徵基本一緻，初步判斷為Ⅱ型結構水閤物，且為多元氣體水閤物。水閤物客體除甲烷、乙烷、丙烷及丁烷等烷烴外，普遍含有氮氣組分。此外，在 DK8-19站位埋深為126.1 m 樣品中髮現水閤物相中硫化氫組分的拉曼信號，這說明特定區域內可能存在硫化氫氣體且形成瞭水閤物。聚乎更鑽探區水閤物樣品拉曼光譜特徵為凍土區天然氣水閤物成藏與分佈規律研究提供瞭新的啟示。
료해천연기수합물적미관결구특정대수합물자원감탐화평개구유중요의의。채용현미격광랍만광보기술，대청해취호경찬탐구내 DK8-19、DK11-14화 DK12-13등3개참위공9개천연기수합물암심양품진행료분석측시，탐토료찬탐구천연기수합물적랍만광보특정。결과표명，청해취호경찬탐구천연기수합물엄범분포，수직방향재126.1～322.2 m 범위내불련속분포，불동찬공、불동매심수합물양품적랍만광보특정기본일치，초보판단위Ⅱ형결구수합물，차위다원기체수합물。수합물객체제갑완、을완、병완급정완등완경외，보편함유담기조분。차외，재 DK8-19참위매심위126.1 m 양품중발현수합물상중류화경조분적랍만신호，저설명특정구역내가능존재류화경기체차형성료수합물。취호경찬탐구수합물양품랍만광보특정위동토구천연기수합물성장여분포규률연구제공료신적계시。
The structure characteristics of natural gas hydrates play a significant role in the exploration and evaluation of natural gas hydrate resource.In this paper,the hydrate samples,recovered from DK8-19,DK11-14 and DK12-13 holes in the Juhugeng drilling area in Qinghai,were investigated by micro-Raman spectroscopy for the structure characteristics.The results show that gas hydrates are widely distributed in the Juhugeng drill-ing area.In the vertical direction,gas hydrate are distributed discontinuously between the depth of 126.1 and 322.2 m.The Raman characteristics of gas hydrates from the three sites with different depths are almost the same,and show structure Ⅱ hydrate with various gas molecules.Besides hydrocarbons such as CH4 ,C2 H6 , C3 H8 and C4 H10 ,N2 is generally observed in these gas hydrates samples.In addition,the Raman signals attrib-uted to H2 S in hydrate phase is found in the gas hydrate sample at depth of 126.1 m from DK8-19 hole,and itis the first time that H2 S in hydrate phase is found in Qilian Mountain hydrates,suggesting that H2 S gas mole-cules exist in some particular areas and gas hydrates form.The Raman spectroscopic characteristics of natural gas hydrates recovered from the Juhugeng drilling area may provide some new revelations for the study on the ac-cumulation and distribution of gas hydrates located in the permafrost area in Qinghai.
