塔里木盆地塔中天然气的地球化学特征及其成因

郭建军; 陈践发; 朱雷; 叶治续; 师生宝; 刘应辉

doi:10.11781/sysydz200706577

塔里木盆地塔中天然气的地球化学特征及其成因

doi: 10.11781/sysydz200706577

1.
中国石油大学石油天然气成藏机理教育部重点实验室, 北京 102200
2. 中国石油天然气股份有限公司冀东油田分公司勘探开发研究院, 河北唐山 063004
3. 中国石油天然气股份有限公司冀东油田分公司南堡油田2号平台工程项目部, 河北唐海 063200

基金项目: 国家重点基础研究发展计划(973计划)项目(2006CB202307)

详细信息

作者简介:
郭建军(1974- ),男(汉族),博士生,工程师,主要从事油气的成因与成藏研究.

中图分类号: TE122.1
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出版历程
- 收稿日期: 2006-12-18
- 修回日期: 2007-10-08
- 刊出日期: 2007-11-28

GEOCHEMICAL CHARACTERISTICS AND GENESIS OF THE NATURAL GAS IN THE TAZHONG UPLIFT, THE TARIM BASIN

1.
Key Laboratory for Hydrocarbon Accumulation Mechanism of the Chinese Ministry of Education, China University of Petroleum, Beijing 102200, China
2. Research Institute of Exploration and Development, Jidong Oilfield Branch Company, PetroChina, Tangshan, Hebei 063004, China
3. The 2nd Ocean Engineering Project Department of Nanpu Oilfield, Jidong Oilfield Branch Company, PetroChina, Tanghai, Hebei 063200, China

摘要

摘要: 塔里木盆地塔中天然气的成因十分复杂,长期以来存在不同的认识。对塔中天然气组分和碳同位素的地球化学特征研究表明:塔中的天然气以烃类气体为主,塔中东、西部天然气的组分和碳同位素存在显著差异,塔中东部和I号构造带的天然气具有较高的干燥系数、较重的碳同位素比值和较高的氮含量。研究认为这些差异除了一定程度上受有机质类型和次生变化的影响外,主要取决于有机质热演化程度的差异。塔中东部下古生界有机质成熟度的定型时间较早,紧邻满加尔凹陷的寒武系烃源岩,因此主要聚集了高-过成熟的寒武系烃源岩生成的天然气;塔中西部主要发育中—上奥陶统有机质,且有机质成熟度的定型时间较晚,因此主要聚集了中等成熟的中—上奥陶统有机质生成的天然气。综合分析表明天然气主要生成于不同热演化阶段的干酪根,原油裂解生气在本区不显著。
- 天然气 /
- 地球化学特征 /
- 奥陶系 /
- 寒武系 /
- 塔中地区 /
- 塔里木盆地
Abstract: The genesis of the natural gas in the Tazhong Uplift is very complicated and there have been existing a variety of opinions for a along period.Based on the systematic research results of the composition and carbon isotope characteristics of the natural gas in the Tazhong Uplift,the natural gas in the Tazhong Uplift is mainly composed of hydrocarbon gases,but the composition and the carbon isotope in the west and east parts of the uplift differ apparently form each other.The natural gases in the eastern Tazhong Uplift and the No.1 structural belt have higher values of dry coefficients,higher nitrogen contents and heavier carbon isotopic ratios.It is regarded that these differences are mainly determined by the different thermal evolution degrees of the organic matter,in addition to the organic matter type and the secondary alteration.The maturity of the Lower Paleozoic organic matter in the east part was fina-lized earlier,and the organic matter distributed immediately near the Cambrian source rock layer of the Manjiaer Sag.Therefore,the gas accumulated in the eastern Tazhong Uplift mainly came from the high to over matured Cambrian source rocks.As a contrast,the maturity of the Middle-Upper Ordovician organic matter in the west part was finalized later,and the gas accumulated in the western Tazhong Uplift mainly came from the middle matured Middle-Upper Ordovician source rocks.These results suggest that the natural gas in the Tazhong Uplift is mainly generated from the kerogens of various thermal evolution degrees,and the amount of the oil-pyrolysis gas is not significant.
- natural gas /
- geochemical characteristics /
- Ordovician /
- Cambrian /
- Tazhong Uplift /
- The Tarim Basin

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参考文献(25)

[1]	张水昌,梁狄刚,张宝民等.塔里木盆地海相油气的生成[M].北京:石油工业出版社,2004.1～433
[2]	周新源,王招明,杨海军等.塔中奥陶系大型凝析气田的勘探和发现[J].海相油气地质,2006,11(1):45～51
[3]	韩剑发,梅廉夫,杨海军等.塔里木盆地塔中地区奥陶系碳酸盐岩礁滩复合体油气来源与运聚成藏研究[J].天然气地球科学,2007,18(3):426～435
[4]	史基安,孙秀建,王金鹏等.天然气运移物理模拟实验及其组分分异与碳同位素分馏特征[J].石油实验地质,2005,27(3):293～297
[5]	朱华银,李剑,李拥军.天然气运聚影响因素研究[J].石油实验地质,2006,28(2):152～154
[6]	雷天柱,张更新,邱军利等.硫对甲烷碳同位素分馏的影响[J].石油实验地质,2006,28(2):173～176
[7]	Prinzhofer A,Mello M R,Takaki T.Geochemical characterization of natural gas:a physical multivariable approach and its applications in maturity and migration estimates[J].AAPG Bull,2000,84(8):1152～1172
[8]	李剑,陈孟晋,蒋助生等.塔里木盆地塔中地区天然气气源对比[J].石油勘探与开发,1999,26(6):33～35
[9]	谢增业,李剑,卢新卫.塔里木盆地海相天然气乙烷碳同位素分类与变化的成因探讨[J].石油勘探与开发,1999,26(6):27～29
[10]	Huang D F,Liu B Q,Wang T D,et al.Genetic type and maturity of Lower Paleozoic marine hydrocarbon gases in the eastern Tarim Basin[J].Chemical Geology,1999,162(1):65～77
[11]	康玉柱.塔里木盆地大气田形成的地质条件[J].石油与天然气地质,2001,22(1):21～25
[12]	陈世加,付晓文,沈昭国等.塔中地区石炭系及部分奥陶系储层天然气的成因[J].天然气工业,2001,21(1):39～41
[13]	Krooss B M,Littke R,Muller B,et al.Generation of nitrogen and methane from sedimentary organic matter:Implication on the dynamics of natural gas accumulations[J].Chemical Geology,1995,126:291～318
[14]	Littke R,Krooss B,Idiz E,et al.Molecular nitrogen in natural gas accumulations:generation from sedimentary organic matter at high temperatures[J].AAPG Bull,1995,79(3):410～430
[15]	Schoell M.Genetic characterization of natural gases[J].AAPG Bull,1983,67(12):2225～2238
[16]	James A T.Correlation of natural gases by use of carbon isotopic distribution between hydrocarbon components[J].AAPG Bull,1983,67(7):1176～1191
[17]	James A T.Correlation of reservoired gases using the carbon isotopic compositions of wet gas components[J].AAPG Bull,1990,74(9):1441～1458
[18]	Berner U,Faber E,Scheeder G,et al.Primary cracking of algal and landplant kerogens:kinetic models of isotopic variations in methane,ethane and propane[J].Chemical Geology,1995,126:233～245
[19]	Lorant F,Prinzhofer A,Behar F,et al.Carbon isotopic and molecular constraints on the formation and the expulsion of thermogenic hydrocarbon gases[J].Chemical geology,1998,147:249～264
[20]	R_o oney M A,Claypool G E,Chung H M.Modeling thermogenic gas generation using carbon isotope ratios of natural gas hydrocarbon[J].Chemical Geology,1995,126:219～232
[21]	Barker C.Calculated volume and pressure changes during the thermal cracking of oil to gas in reservoirs[J].AAPG Bull,1990,74(8):1254～1261
[22]	Battani A,Sarda P,Prinzhofer A.Basin scale natural gas source,migration and trapping traced by noble gases and major elements:the Pakistan Indus basin[J].Earth and Planetary Science Letters,2000,181:229～249
[23]	Behar F,Kressmann S,Rudkiewicz J L,et al.Experimental simulation in a confined system and kinetic modeling of kerogen and oil cracking[J].Organic Geochemistry,1991,19(1-3):173～189
[24]	Horsfield B,Schenk H J,Mills N,et al.An investigation of the in-reservoir conversion of oil to gas:compositional and kinetic findings from Closed-system programmed-temperature pyrolysis[J].Organic Geochemistry,1992,19(1-3):191～204
[25]	Prinzhofer A A,Huc A Y.Genetic and post-genetic molecular and isotopic fractionations in natural gases[J].Chemical Geology,1995,126(3-4):281～290