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低熟气地球化学特征与判识指标 被引量:22

Geochemical Characteristics and Identification Indexes of Low-mature Gases
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摘要 从目前的研究来看,低熟气的源岩母质类型主要以有机质丰度较高的Ⅲ型煤系为主。低熟气热演化程度(RO)值在0.4%~0.8%之间,根据煤型气CH4碳同位素组成与热演化程度RO之间的"二阶模式"关系,煤型气CH4碳同位素组成应该分布在-54‰^-39‰之间,目前发现的低熟气CH4碳同位素组成主要集中在-49‰^-39‰之间。一般认为煤型气的C2H6碳同位素组成重于-28‰,但是,当考虑低熟气时,将这一指标定为-29‰更为合适。根据煤型气CH4碳、氢同位素关系,低熟煤型气的CH4氢同位素组成分布在-300‰^-216‰之间。天然气轻烃参数中,低熟煤型气的庚烷值分布在16%~22%之间,异庚烷值分布在2.2~5.0之间。生物气不仅在CH4、C2H6碳同位素组成上与低熟气存在明显的差别,同时在轻烃含量的参数上也存在明显的差别。 From the current studies, the coal measures with high organic matter are main types of source rocks of low-mature gases. The thermal evolution indices(R0) of low-mature gases should be within the range of about 0.4 %-0.8%, and corresponding carbon isotope values of methane is within the range of about -49%0--39X0 according the two-stage model of carbon isotope fractionation for coal type gases. It's generally believed that δ^13Cethane value of coal-type gas is more than -28 ‰, however, when considering the low-mature gases, the value of -29‰ is more appropriate. According to relationship of carbon and hydrogen isotopic compositions of coal-type gases, the hydrogen isotopic composition of low mature gases should be within the range of about -300‰-216‰. Heptane value of low mature gases are located in between 16 %-22% and isoheptane value are in between 2. 245.0. There exists an obvious difference between biogenic gas and low-mature gases not only in the carbon isotopic compositions of methane and ethane, but also in light hydrocarbon concentration.
出处 《天然气地球科学》 EI CAS CSCD 北大核心 2010年第1期1-6,共6页 Natural Gas Geoscience
基金 国家自然科学基金项目(编号:40703001) 油气重大专项(编号:2008ZX05008-001)联合资助
关键词 低熟气 地球化学 稳定同位素 轻烃 Low-mature gases Geochemistry Stable isotope Light hydrocarbon.
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  • 1徐永昌,王志勇,王晓锋,郑建京,杜宏宇.低熟气及我国典型低熟气田[J].中国科学(D辑),2008,38(1):87-93. 被引量:30
  • 2徐永昌,王晓锋,史宝光.低熟气——煤成气理念的延伸[J].石油勘探与开发,2009,36(3):408-412. 被引量:16
  • 3XU Yongchang WANG Xiaofeng SHI Baoguang.Low-mature gases and their resource potentiality[J].Chinese Journal Of Geochemistry,2009,28(3):231-238. 被引量:5
  • 4Galimov E M. Sources and mechanisms of formation of gaseous hydrocarbons in sedimentary rocks[J]. Chem. Geol. , 1988,71:77-95.
  • 5Stahl W J,Carey Jr B B. Source rock identification by isotope analyses of natural gases from fields in the Val Varde Delaware basins, West Texas[J]. Chem. Geol. , 1975, 16: 257- 267.
  • 6刘文汇,徐永昌.煤型气碳同位素演化二阶段分馏模式及机理[J].地球化学,1999,28(4):359-366. 被引量:147
  • 7Galimov E M. Methane δ ^13C and 3 D data on the origin of gases in Northern West Siberia[J]. Dokl Akad Nauk, 1995, 342: 371-374.
  • 8Thompson K F M. Classification and thermal history of petroleum based on light hydrocarbons[J]. Geochimica et Cos mochimica Acta, 1983,47(2):303- 316.
  • 9Herbert Volk, Brian Horsfield, Ulrich Mann, et al. Variability of petroleum inclusions in vein,fossil and vug cements Ageochemical study in the Barrandian basin(Lower Palaeozoic, Czech Republic) [J ]. Organic Gcochemistry, 2002,33 ( 12 ): 1319-1341.
  • 10Schoell M. Genetic characterization of natural gas[J].AAPG Bulletin, 1983,67 : 2225-2238.

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