CAJ | 학술논문

南祁连盆地东北部木里地区2008年11月5日DK-1孔首次发现天然气水合物，之后分别在DK-2、DK-3孔中再次钻遇天然气水合物，并经激光拉曼测试证实为天然气水合物，取得了找矿工作的重大突破，表明盆地已经具备生烃潜力。三叠系尕勒得寺组在木里地区分布较广，岩性以泥岩为主，碳酸盐岩为辅。通过残余有机碳来表示有机质丰度，有机碳含量平均为11．82％，平均在2．4％左右，属于中等～好烃源岩；烃源岩热解氢指数 HI和降解潜率D分析后确定南祁连盆地木里地区烃源岩有机质类型为Ⅲ型。岩石热解参数特征来评价烃源岩的成熟度结果显示最高热解峰温（Tmax ）为547～580℃，平均为564℃，反应烃源岩处于成熟演化阶段的上限。综上所述，三叠系烃源岩有较好的生烃潜力，评价三叠系尕勒得寺组烃源岩的生烃潜力具有重要的科学、经济和环境意义，同时也为开辟青海东北部油气地质调查新区与工作部署提供依据。
남기련분지동북부목리지구2008년11월5일DK-1공수차발현천연기수합물，지후분별재DK-2、DK-3공중재차찬우천연기수합물，병경격광랍만측시증실위천연기수합물，취득료조광공작적중대돌파，표명분지이경구비생경잠력。삼첩계소륵득사조재목리지구분포교엄，암성이니암위주，탄산염암위보。통과잔여유궤탄래표시유궤질봉도，유궤탄함량평균위11．82％，평균재2．4％좌우，속우중등～호경원암；경원암열해경지수 HI화강해잠솔D분석후학정남기련분지목리지구경원암유궤질류형위Ⅲ형。암석열해삼수특정래평개경원암적성숙도결과현시최고열해봉온（Tmax ）위547～580℃，평균위564℃，반응경원암처우성숙연화계단적상한。종상소술，삼첩계경원암유교호적생경잠력，평개삼첩계소륵득사조경원암적생경잠력구유중요적과학、경제화배경의의，동시야위개벽청해동북부유기지질조사신구여공작부서제공의거。
In Muli area northeast of the basin in southern Qilian DK-1hole first discovery of natural gas hydrate in November 5 ,2008 ,respectively in DK-2 ,DK-3 holes drilled gas hydrate again .The laser Raman test confirmed that natural gas hydrate .It achieved a major breakthrough in prospecting work and Indicated that the basin already has hydrocarbon generation potential .The Triassic Galede Temple group is widely distributed in the Muliarea ,lithology is mainly mudstone ,carbonate supplement .It said organic matter abundance through residual organic carbon ,organic carbon content is 11 .82% ,the average is about 2 .4% , which belongs to the middle to the good hydrocarbon source rock ;Hydrocarbon source rock pyrolysis hydrogen index HI and potential degradation rate of D analysis to determine the types of organic matter in Muli area south of hydrocarbon source rocks of Qilian basin is type III .The characteristics of pyrolysis parameters of rock for hydrocarbon source rock maturity evaluation showed the highest pyrolysis peak temperature (Tmax ) 547~580 ℃ ,the average 564 ℃ ,and reaction of hydrocarbon source rocks is in a mature stage of the upper limit .In summary ,Triassic hydrocarbon source rocks had good potential of hydrocarbon generation .There are scientific ,economic and environmental significances of hydrocarbon poten-tial evaluation of Triassic Galede hydrocarbon source rock temple group ,and also provides the basis for the development of northeast Qinghai petroleum geological survey new area and work deployment .