四川盆地乐山-龙女寺古隆起震旦系天然气成藏史

doi:10.11743/ogg2016020105

摘要/Abstract

摘要： 应用天然气生成和同位素分馏的化学动力学方法对四川盆地乐山-龙女寺古隆起震旦系天然气成藏史进行研究。结果表明：①高石梯-磨溪含气构造为继承性隆起，有利于天然气的高效聚集，震旦系灯影组主要聚集191 Ma以来所生天然气，早期所生天然气未运聚成藏或散失，成藏参与率约为79%；②资阳构造圈闭受燕山期构造运动影响逐渐演化成威远构造的斜坡，构造运动调整过程中剩余未裂解原油运移至新的构造高部位——威远构造继续裂解，资阳和威远气田分别聚集构造调整前后（106～104 Ma）所生天然气；③威远气田构造圈闭由于形成较晚，捕捉到的原油裂解气有限，成藏参与率约为51%，低于高石梯-磨溪地区；④资阳-威远地区构造反转过程中资阳古隆起中天然气会大量散失，尽管高石梯-磨溪地区天然气生成结束的时间早于资阳-威远地区90 Ma，不利于保存，但其气藏充满度却高于资阳-威远地区。

关键词: 同位素动力学, 生烃动力学, 成藏史, 乐山-龙女寺古隆起, 四川盆地

Abstract: History of natural gas accumulation in Leshan-Longnyusi Sinian paleo-uplift in the Sichuan Basin was studied with chemical kinetic methods of gas generation and isotopic fractionation.The results show that:①Gaoshiti-Moxi gas bearing structure is an inherited uplift which is conducive to efficient accumulation of natural gas.The natural gas generated since 191 Ma mainly gathered in the Sinian Dengying Formation,while that generated earlier didn't accumulate or dissipated after accumulation.The gas accumulation participation rate is about 79%.②The Ziyang structural trap gradually evolved into a tectonic slope of Weiyuan trap during the Yanshan tectonic movement.The remaining non-pyrolysed crude oil migrated to the new structural high-Weiyuan trap and continued to pyrolyse there during the tectonic movement.So Ziyang and Weiyuan gas fields gather the natural gas generated before and after structural adjustment(106-104 Ma),respectively.③Weiyuan structural trap captured limited pyrolysis gas due to its late formation,and its gas accumulation participation rate is about 51%,which is lower than that in Gaoshiti-Moxi area.④Much natural gas in Ziyang paleo-uplift was lost during Ziyang-Weiyuan tectonic inversion.Although the ending of gas generation in Gaoshiti-Moxi area is 90 Ma earlier than that in Ziyang-Weiyuan area,which is not conducive to the preservation,its gas reservoir fullness is higher than the later area.

Key words: isotopic fractionation kinetics, hydrocarbon generation kinetics, accumulation history, Leshan-Longnyasi paleo-uplift, Sichuan Basin

中图分类号:

TE122.1

李吉君,曹群,卢双舫,等. 四川盆地乐山-龙女寺古隆起震旦系天然气成藏史[J]. 石油与天然气地质, 2016, 37(1): 30-36. doi: 10.11743/ogg2016020105 Li Jijun,Cao Qun,Lu Shuangfang,et al. History of natural gas accumulation in Leshan-Longnyusi Sinian paleo-uplift, Sichuan Basin[J]. Oil & Gas Geology, 2016, 37(1): 30-36. doi: 10.11743/ogg2016020105

参考文献

[1] 田兴旺,胡国艺,李伟,等.四川盆地乐山-龙女寺古隆起地区震旦系储层沥青地球化学特征及意义[J].天然气地球科学,2013,24(5):982-990. Tian Xingwang,Hu Guoyi,Li Wei,et al.Geochemical characteristics and significance of Sinian reservoir bitumen in Leshan-Longnvsi paleo-uplift area,Sichuan Basin[J].Natural Gas Geoscience,2013,24(5):982-990.
[2] 韩克猷,孙玮.四川盆地海相大气田和气田群成藏条件[J].石油与天然气地质,2014,35(1):10-18. Han Keyou,Sun Wei.Conditions for the formation of large marine gas fields and gas field clusters in Sichuan Basin[J].Oil & Gas Geology,2014,35(1):10-18.
[3] 郭彤楼.四川盆地奥陶系储层发育特征与勘探潜力[J].石油与天然气地质,2014,35(3):372-378. Guo Tonglou.Charateristics and exploration potential of Ordovician reservoirs in Sichuan Basin[J].Oil & Gas Geology,2014,35(3):372-378.
[4] 王庭斌,董立,张亚雄.中国与煤成气相关的大型、特大型气田分布特征及启示[J].石油与天然气地质,2014,35(2):167-182. Wang Tingbin,Dong Li,Zhang Yaxiong.Distribution of large and giant coal-related gas fields in China and its significance[J].Oil & Gas Geology,2014,35(2):167-182.
[5] 张林,魏国齐,汪泽成,等.四川盆地高石梯-磨溪构造带震旦系灯影组的成藏模式[J].天然气地球科学,2004,15(6):584-589. Zhang Lin,Wei Guoqi,Wang Zecheng,et al.Analysis of formation mechanism of Sinian Dengying formation in Gaoshiti-Moxi structure belt in Sichuan Basin[J].Natural Gas Geoscience,2004,15(6):584-589.
[6] 杨家静.四川盆地乐山-龙女寺古隆起震旦系油气藏形成演化研究[D].成都:西南石油学院,2002. Yang Jiajing.Study on formation and evolution of Sinian petroleum pools in Leshan-Longnusi Paleo-uplift,Sichuan Basin[D].Chengdu:Southwest Petroleum University,2002.
[7] 许海龙,魏国齐,贾承造,等.乐山-龙女寺古隆起构造演化及对震旦系成藏的控制[J].石油勘探与开发,2012,39(4):406-16. Xu Hailong,Wei Guoqi,Jia Chengzao,et al.Tectonic evolution of the Leshan-Longnusi paleo-uplift and its control on gas accumulation in the Sinian strata,Sichuan Basin[J].Petroleum Exploration and Development,2012,39(4):406-416.
[8] 徐世琦,洪海涛,师晓蓉.乐山-龙女寺古隆起与下古生界含油气性的关系探讨[J].天然气勘探与开发,2002,25(3):10-15. Xu Shiqi,Hong haitao,Shi Xiaorong.Relationship analysis of the Leshan-Longnusi paleo-uplift and petroleum potential of Lower Paleozoic[J].Natural Gas Exploration and Development,2002,25(3):10-15.
[9] 戴金星.威远气田成藏期及气源[J].石油实验地质,2003,25(5):473-480. Dai Jinxing.Pool-forming periods and gas sources of Weiyuan gasfield[J].Petroleum Geology and Experiment,2003,25(5):473-480.
[10] 姚建军,郑浚茂,宁宁,等.四川盆地高石梯-磨溪构造带震旦系含油气系统研究[J].天然气地球科学,2002,13(5-6):74-79. Yao Jianjun,Zheng Junmao,Ning Ning,et al.Research of Sinian petroleum system in Gaoshiti-Moxi structure belt,Sichuan Basin[J].Natural Gas Geoscience,2002,13(5-6):74-79.
[11] 姚建军,陈孟晋,华爱刚,等.川中乐山-龙女寺古隆起震旦系天然气成藏条件分析[J].石油勘探与开发,2003,30(4):7-9. Yao Jianjun,Chen Mengjin,Hua Aigang,et al.Formation of the gas reservoirs of the Leshan-Longnvsi Sinian palaeo-uplift in central Sichuan[J].Petroleum Exploration and Development,2003,30(4):7-9.
[12] 张水昌,朱光有.四川盆地海相天然气富集成藏特征与勘探潜力[J].石油学报,2006,27(5):1-8. Zhang Shuichang,Zhu Guangyou.Gas accumulation characteristics and exploration potential of marine sediments in Sichuan Basin[J].Acta Petrolei Sinica,2006,27(5):1-8.
[13] 孙玮,刘树根,马永生,等.四川盆地威远-资阳地区震旦系油裂解气判定及成藏过程定量模拟[J].地质学报,2007,81(8):1153-1159. Sun Wei,Liu Shugen,Ma Yongsheng,et al.Determination and quantitative simulation of gas pool formation process of Sinian cracked gas in Weiyuan-Ziyang area,Sichuan Basin[J].Acta Geologica Sinica,2007,81(8):1153-1159.
[14] 李吉君,卢双舫,薛海涛,等.川东北飞仙关组鲕滩气藏天然气运聚效率[J].地球科学:中国地质大学学报,2008,33(4):565-571. Li Jijun,Lu Shuangfang,Xue Haitao,et al.Migration and accumulation efficiency of natural gas in feixianguan formation oolitic gas reservoirs,northeastern Sichuan Basin[J].Earth Science-Journal of China University of Geosciences,2008,33(4):565-571.
[15] 杨家静,王一刚,王兰生,等.四川盆地东部长兴组-飞仙关组气藏地球化学特征及气源探讨[J].沉积学报,2002,20(2):349-352. Yang Jiajing,Wang Yigang,Wang Lansheng,et al.The origin of natural gases and geochemistry characters of Changxing reef and Feixianguan oolitic beach gas reservoirs in eastern Sichuan Basin[J].Acta Sedimentologica Sinaca,2002,20(2):349-352.
[16] 朱光有,张水昌,梁英波,等.四川盆地天然气特征及气源[J].地学前缘,2006,13(2):234-248. Zhu Guangyou,Zhang Shuichang,Liang Yingbo,et al.The characteristics of natural gas in Sichuan basin and its sources[J].Earth Science Frontiers,2006,13(2):234-248.
[17] 卢双舫.有机质成烃动力学理论及其应用[M].北京:石油工业出版社,1996. Lu Shuangfang.The theory of organic matter hydrocarbon generation kinetics and its application[M].Beijing:Petroleum Industry Press,1996.
[18] 卢双舫,李吉君,薛海涛,等.碳同位素分馏模型比较研究[J].天然气工业,2006,26(7):1-4. Lu Shuangfang,Li Jijun,Xue Haitao,et al.Comparison of fractionation models of carbon isotope[J].Natural Gas Industry,2006,26(7):1-4.
[19] Stahl W J.Carbon and nitrogen isotopes in hydrocarbon research and exploration[J].Chemical Geology,1977,20:121-149.
[20] Schoell M.The hydrogen and carbon isotopic composition of methane from natural gases of various origins[J].Geochemical et Cosmochimica Acta,1980,44(5):649-661.
[21] 韩会平,武春英,季海琨,等.苏里格南部地区上古生界天然气成藏条件及勘探潜力[J].油气地质与采收率,2014,21(4):33-36. Han Huiping, Wu Chunying, Ji Haikun,et al.Reservoir-forming conditions and exploration potential of natural gas in the upper Paleozoic,southern area of Sulige[J].Petroleum Geology and Recovery Efficiency,2014,21(4):33-36.
[22] 陈迎宾,胡烨,王彦青,等.柴达木盆地鄂博梁Ⅲ号构造深层天然气成藏条件[J].油气地质与采收率,2015,22(5):34-39,63. Chen Yingbin,Hu Ye,Wang Yanqing,et al.Research on the deep gas accumulation conditions of Eboliang-Ⅲ structure,Qaidam Basin[J].Petroleum Geology and Recovery Efficiency,2015,22(5):34-39,63.
[23] 戴金星.各类烷烃气的鉴别[J].中国科学B辑,1992,22(2):185-193. Dai Jinxing.The identification of different kinds of alkane gas[J].Science in China,Series B,1992,22(2):185-193.
[24] 戴金星.天然气碳氢同位素特征和各类天然气鉴别[J].天然气地球科学.1993,2(3):2-40. Dai Jinxing.Carbon and hydrogen isotopic characteristics of natural gas and the identification of different kinds of natural gas[J].Natural Gas Geoscience.1993,2(3):2-40.
[25] 黄第藩,刘宝泉.塔里木盆地东部天然气的成因类型及其成熟度判识[J].中国科学:D辑,1996,26(4):365-372. Huang Difan,Liu Baoquan.The natural gas origin types and maturity in east part of Tarim Basin[J].Science in China,Series D,26(4):365-372.
[26] Bener U,Faber E,Scheeder G.Primary cracking of algal and landplant kerogens:Kinetic models of isotope variations in methane,ethane and propane[J].Chemical Geology,1995,126:233-245.
[27] Bener U,Faber E,Stahl W.Mathematical simulation of the carbon isotopic fractionation between huminitic coals and related methane[J].Chemical Geology,1992,94(4):315-319.
[28] Lorant F,Behar F,Vandenbroucke M.Methane generation from methylated aromatics:Kinetic study and carbon isotope modeling[J].Energy&Fuels,2000,14:1143-1155.
[29] Lorant F,Prinzhofer A.Carbon isotopic and molecular constraints on the formation and the expulsion of thermogenic hydrocarbon gases[J].Chemical Geology,1998,147:249-264.
[30] Cramer B,Krooss B M,Littke R.Modelling isotope fractionation during primary cracking of natural gas:a reaction kinetic approach[J].Chemical Geology,1998,149(3-4):235-250.
[31] Cramer B,Faber E,Gerling P,et al.Reaction kinetics of stable carbon isotopes in natural gas-Insights from dry open system pyrolysis experiments[J].Energy & Fuels,2001,15(3):517-532.
[32] Xiong Y Q,Geng A S,Liu J Z.Kinetic-simulating experiment combined with GC-IRMS analysis:application to identification and assessment of coal-derived methane from Zhongba Gas Field(Sichuan Basin,China)[J].Chemical Geology,2004,213,325-338.
[33] Li J J,Lu S F,Xue H T,et al.A study of the migration and accumulation efficiency and the genesis of hydrocarbon natural gas in the Xujiaweizi fault depression[J].Acta Geologica Sinica (English Edition),2008,82(3):629-635.
[34] Li J J,Lu S F,Wu W,et al.Role of water and its influence on the hydrogen isotopic composition of natural gas during the generation of natural gas[J].Acta Geologica Sinica (English edition),2011,85(5):1203-1210.
[35] 张长宝,罗东坤,魏春光.中亚阿姆河盆地天然气成藏控制因素[J].石油与天然气地质,2015,36(5):766-773. Zhang Changbao,Luo Dongkun,Wei Chunguang.Controlling factors of natural gas accumulation in the Amu Darya Basin,Central Asia[J].Oil & Gas Geology,2015,36(5):766-773.
[36] 张春林,庞雄奇,田世澄,等. 天然气成藏过程中地层水相态变化——以鄂尔多斯盆地上古生界为例[J].石油与天然气地质,2013,34(5):640-645. Zhang Chunlin,Pang Xiongqi,Tian Shicheng,et al.Phase state changes of formation water in gas accumulation process:A case study from the Upper Paleozoic,Ordos Basin[J].Oil & Gas Geology,2013,34(5):640-645.
[37] Zou Y Y,Zhao C Y,Wang Y P,et al.Characteristics and origin of natural gases in the Kuqa Depression of Tarim Basin,NW China[J].Organic Geochemistry,2006,37:280-290.
[38] 李吉君.天然气生成过程中的碳同位素分馏作用研究[D].大庆:大庆石油学院,2005. Li Jijun.Study of carbon isotopes fractionation during the process of nature gas generation[D].Daqing:Daqing Petroleum Institute,2005.
[39] 杨渊宇.乐山-龙女寺古隆起构造特征及与震旦系油气成藏关系[D].成都:成都理工大学,2013. Yang Yuanyu.The tectonic characteristics of Leshan-Longnvsi paleo-uplift and it's relationship with forming Sinian Gas-oil reservoir[D].Chengdu:Chengdu University of Technology,2013.