收稿日期: 2008-10-10
修回日期: 2008-11-06
网络出版日期: 2008-12-10
Research Progress of Source Rocks and Formationof Low Evolution Oil and Gas in Turpan-Hami Basin
Received date: 2008-10-10
Revised date: 2008-11-06
Online published: 2008-12-10
通过对吐哈盆地中、下侏罗统6块源岩抽提物的饱和烃和芳烃馏分进行有机地球化学研究，除进一步印证了前人一些主要结论（如母源输入以高等植物为主、有机质类型以Ⅲ型为主和源岩演化程度低等）外，还发现了一些富有科学意义的新的现象与特征，主要包括：源岩样品中含较高丰度的树脂体类化合物；样品中存在八硫环形式的单质硫；源岩有机质经受过较明显的生物降解作用。认为树脂体类化合物是低演化烃的重要母质，单质硫八硫环和生物降解作用都会导致有机质成烃活化能降低，从而促使有机质在较低的热演化阶段形成油气；这些新的发现对于认识源岩在低演化阶段形成商业性的低熟气储层具有重要意义；吐哈盆地有机质成熟度主体处于RO＜0.8%的演化阶段，所生成的原油应为低演化阶段的油，天然气则相应为低熟气。
王作栋,;陶明信;孟仟祥;李中平;王晓锋;王志勇;杜宏宇 . 吐哈盆地烃源岩研究进展与低演化油气的形成[J]. 天然气地球科学, 2008 , 19(06) : 754 -760 . DOI: 10.11764/j.issn.1672-1926.2008.06.754
Geochemical studies were carried out on the saturated and aromatic hydrocarbon fraction of six source rocks collected from the Middle to Lower Jurassic of Turpan Hami basin. In the study, we proved some views proposed by the predecessors (1. the organic matter input is mainly higher plants; 2. the organic matter types of source rock are mainly type Ⅲ; 3. the source rocks evolution degree is low). At the same time, some new significant findings were revealed (for instance, the Turpan Hami Basin source rock samples have a high abundance of resin compounds, the organic matter in source rocks suffered a significant biodegradation, and 8S (sulfur) ring substance is also found in the samples). These substances and the geological action will ultimately lead the activation energy to be greatly reduced, which make it easily to form oil and gas at the lower stage of thermal evolution. The research indicates that the thermal evolution degree of organic matter is less than 0.8% (RO), and the resulting oil and gas are categorized as immature oil and low mature gas, respectively. These findings may have important significance to understand the mechanism of oil and gas formation and accumulation，especially for the low-mature gas.
Key words： Source rock; Element sulfur; Low-ature gas; Research progress; Turpan-Hami basin.
［1］戴卿林,郝石生，盛国英，等.吐哈盆地侏罗纪煤系源岩芳烃组成及生源和环境意义［J］.沉积学报,1997,15(2):198-201.
［2］徐永昌，王志勇，王晓锋，等.低熟气及我国典型低熟气田[J].中国科学:D辑,2008,38(1):87-93.
［3］徐永昌.天然气成因理论及应用［M］.北京:科学出版社,1994.
［4］王昌桂,程克明,徐永昌,等.吐哈盆地侏罗系煤成烃地球化学[M].北京:科学出版社,1998:20-134.
［5］胡见义,赵文智,钱凯,等.中国西北地区天然气地质基本特征[J].石油学报,1996,17(3):1-11.
［6］李文厚,邵磊.西北地区湖相浊流沉积[J].西北大学学报：自然科学版,2001,31(1):57-62.
［7］李勇,邵磊.吐哈盆地侏罗系沉积特点及油气资源［J］.西北大学学报：自然科学版,2004,34(6): 698-702.
［8］邵磊,李文厚,袁明生.吐鲁番—哈密盆地陆源碎屑沉积环境及科技兴邦分析[J].沉积学报,1999,17(3):435-422.
［9］陈建平,赵文智,秦勇,等.中国西北地区侏罗纪煤系油气形成(之一）［J］.石油勘探与开发,1998, 25(3):1-5.
［10］蒂索 B P,威尔特 D H. 石油的形成与分布［M］.徐永元,徐濂,郝石生,等译.北京:石油工业出版社,1989:289-299.
［11］Ahmed M,Smith J W, George C. Effects of Biodegradation on Australian Permain coals［J］.Organic Geochemistry, 1999,30:1311-1322.
［12］Rowland S J, Alexander R,Kagi R I,et al.Microbial degradation of aromatic components of crude oils: a comparison of laboratory and field observations［J］.Organic Geochemistry,1986,9:153-161.
［13］Bayona J M,Albaiges J,Solanas A M,et al.Selective aerobic degradation of methyl-substituted polycyclic aromatic hydrocarbons in petroleum by pure microbial cultures［J］.International Journal of Environmental Analytical Chemistry, 1986,23:289-303.
［14］Curry D J,Emmett J K,Hunt J W.Geochemistry of aliphatic-rich coals in the Copper Basin,Australia and Taranaki Basin,New Zealand: implications for the occurrence of potentially oil-generative coals[M]//Scott A C,Fleet A J.Coal and Coal-bearing Strata as Oil-prone Source Rocks? London:Geological Society Special Publication No.77,１９９４:149-182.
［15］孟仟祥,房嬛,徐永昌,等.柴达木盆地石炭系烃源岩和煤岩生物标志物特征及其地球化学意义［Ｊ］.沉积学报,2004(12):730-736.
［16］Dastillung M.Lipides de Sediments Recents［Ｄ］.Strasbourg:University of Strasbourg,1976:1-147.
［17］丁安娜,孟仟祥,崔明中,等.微生物改造有机质与未—低熟石油的形成[J].天然气地球科学,1999,10(1-2):23-29.
［18］Kimble B J.The Geochemistry of Triterpenoid Hydrocarbons[D].Bristol:University of Bristol,1972.
［19］Wenger L M,Isaksen G H.Control of Hydrocarbon Seepage Intensity on Level of Biodegradation in Sea Bottom Sediments［J］.Organic Geochemistry,2002,33,1277-1292.
/
| 〈 |
|
〉 |
甘公网安备 62010202000678号