Kinetics and model of gas generation of source rocks in the deepwater area, Qiongdongnan Basin

HUANG Baojia; HUANG Hao; WANG Zhenfeng; HUANG Yiwen; SUN Zhipeng

doi:10.1007/s13131-015-0646-3

琼东南盆地深水区烃源岩生烃动力学及生气模式

doi: 10.1007/s13131-015-0646-3

1.
中海石油 (中国) 有限公司湛江分公司, 湛江 524057
2.
中国石油大学, 北京 102200

计量
- 文章访问数: 1390
- HTML全文浏览量: 52
- PDF下载量: 1118
- 被引次数: 0
出版历程
- 收稿日期: 2014-06-26
- 修回日期: 2014-09-27

Kinetics and model of gas generation of source rocks in the deepwater area, Qiongdongnan Basin

1.
Zhanjiang Branch of China National Offshore Oil Corporation (CNOOC) Limited, Zhanjiang 524057, China
2.
China University of Petroleum, Beijing 102200, China

摘要

摘要: 为研究琼东南盆地深水区烃源岩的生烃过程和生气潜力,应用封闭体系高温高压热模拟实验和Kinetics软件,获取了盆内渐新统崖城组主力烃源岩(煤和浅海泥岩)生气的活化能和频率因子等动力学参数:浅海泥岩的C₁-C₅活化能分布介于50-74 kcal/mol之间、频率因子是2.4×10¹⁵s^-1,煤样的C₁-C₅活化能分布介于49-73 kcal/mol之间、频率因子是8.92×10¹³s^-1;进而结合地层埋藏史和热史资料,建立了崖城组烃源岩逼近地下条件的生气模式,揭示其主生气阶段对应的Ro在1.25%-2.85%之间;同时,模拟再现了深水区陵水凹陷中部、南部斜坡和凸起等不同构造位置的崖城组烃源岩生气史.其中,陵水凹陷中部和南斜坡崖城组烃源岩大量生气时间分别发生在距今10Ma和5Ma;后者的生气高峰期出现在距今3 Ma之后,晚期快速生气且生气强度大(20×10⁸-60×10⁸ m³/km²),为该区天然气聚集成藏提供了有利的烃源条件.本研究成果对盆内深水勘探区带选择和目标评价有重要指导作用.
- 崖城组烃源岩 /
- 生烃动力学 /
- 生气模式 /
- 深水区 /
- 琼东南盆地
Abstract: In order to investigate the hydrocarbon generation process and gas potentials of source rocks in deepwater area of the Qiongdongnan Basin, kinetic parameters of gas generation (activation energy distribution and frequency factor) of the Yacheng Formation source rocks (coal and neritic mudstones) was determined by thermal simulation experiments in the closed system and the specific KINETICS Software. The results show that the activation energy (E_a) distribution of C₁-C₅ generation ranges from 50 to 74 kcal/mol with a frequency factor of 2.4×10¹⁵s^-1 for the neritic mudstone and the E_a distribution of C₁-C₅ generation ranges from 49 to 73 kcal/mol with a frequency factor of 8.92×10¹³s^-1 for the coal. On the basis of these kinetic parameters and combined with the data of sedimentary burial and paleothermal histories, the gas generation model of the Yacheng Formation source rocks closer to geological condition was worked out, indicating its main gas generation stage at R_o (vitrinite reflectance) of 1.25%-2.8%. Meanwhile, the gas generation process of the source rocks of different structural locations (central part, southern slope and south low uplift) in the Lingshui Sag was simulated. Among them, the gas generation of the Yacheng Formation source rocks in the central part and the southern slope of the sag entered the main gas window at 10 and 5 Ma respectively and the peak gas generation in the southern slope occurred at 3 Ma. The very late peak gas generation and the relatively large gas potential indices (GPI: 20×10⁸-60×10⁸ m³/km²) would provide favorable conditions for the accumulation of large natural gas reserves in the deepwater area.
- Yacheng Formation source rock /
- gas generation kinetics /
- gas generation model /
- deepwater area /
- Qiongdongnan Basin

HTML全文

参考文献(25)

Berner U, Faber E, Seheeder G, et al. 1995. Primary cracking of algal and landplant kerogens: kinetic models of isotope variations in methane, ethane and propane. Chemical Geology, 126(3-4): 233-245

Connan J. 1974. Time-temperature relation in oil genesis. AAPG Bulletin, 58(12): 2516-2521

Cramer B, Faber E, Gerling P, et al. 2001. Reaction kinetics of stable carbon isotopes in natural gas-insights from dry, open system pyrolysis experiments. Energy and Fuels, 15(3): 517-532

Dai Jinxing, Wang Tingbin, Song Yan, et al. 1997. Formation and Distribution of and Medium-Large-Sized Gas Fields in China (in Chinese). Beijing: Geological Publishing House, 1: 184-189

Hill R J, Jenden P D, Tang Y C, et al. 1994. Influence of pressure on pyrolysis of coal. In: Mukhopadhyay P K, Dow W G, eds. Vitrinite Reflectance as a Maturity Parameter, Application and Limitation. ACS Symposium Series 570. Washington DC: American Chemical Society, 161-193

Hu Xiangyun, Li Sitian, Xie Xinong. 2000. Overview on kinetic models for the organic matter hydrocarbon generation. Geological Science and Technology Information (in Chinese), 19(1): 65-68

Huang Baojia. 1999. Gas potential and its favorable exploration areas in Qiongdongnan Basin. Natural Gas Industry (in Chinese), 19(1): 34-39

Huang Baojia, Huang Heting, Li Li, et al. 2010. Characteristics of marine source rocks and effect of high temperature and overpressure to organic matter maturation in Yinggehai-Qiongdongnan Basins. Marine Origin Petroleum Geology (in Chinese), 15(3): 11-18

Huang Baojia, Li Xushen, Wang Zhenfeng, et al. 2012. Source rock geochemistry and gas potential in the deep water area, Qiongdongnan Basin. China Offshore Oil and Gas (in Chinese), 24(4): 1-7

Huang Baojia, Wang Zhenfeng, Liang Gang. 2014. Natural gas source and migration-accumulation pattern in the central canyon, the deep water area, Qiongdongnan basin. China Offshore Oil and Gas (in Chinese), 26(5): 8-14

Huang Baojia, Xiao Xianming, Li Xuxian. 2003. Geochemistry and origins of natural gases in the Yinggehai and Qiongdongnan Basins, offshore South China Sea. Organic Geochemistry, 34(7): 1009-1025

Jiang Qigui, Wang Yanbin, Wang Qin, et al. 2010. Kinetics of the hydrocarbon generation process of marine source rocks in South China. Petroleum Exploration and Development, 37(2): 174-180

Li Xushen, Xiao Xianming, Huang Baojia, et al. 2005. Hydrocarbongenerating dynamics and carbon isotope dynamics of the source rocks in Yanan seg. Natural Gas Industry (in Chinese), 25(8): 9-11

Liu Min, Lu Shuangfang, Xue Hai, et al. 2011. Chemical kinetics application of hydrocarbon generation of upper Permian Dalong stratum in the northeastern Sichuan Basin. Science Technology and Engineering (in Chinese), 11(17): 3923-3928

Liu Jinzhong, Tang Yongchun. 1998. An example of predicting the production of methane using the kinetic method for hydrocarbon generation from kerogen. Chinese Science Bulletin, 43(11): 1187-1191

Lin Shijing, Ge Minglan, Li Shuyuan, et al. 2001. Research on pyrolysis process and kinetic parameters of kerogen from Songliao Basin in presence of mineral matrixes. Journal of Beijing Institute of Petro-Chemical Technology (in Chinese), 9(1): 19-22

Lu Shuangfang, Li Jiaona, Liu Shaojun, et al. 2009. Oil generation threshold depth of Songliao Basin: Revision and its significance.Petroleum Exploration and Development, 36(2): 166-173

Peters K E, Walters C C, Mankiewicz P J. 2006. Evaluation of kinetic uncertainty in numerical models of petroleum generation. AAPG Bulletin, 90(3): 387-403

Rao Song, Hu Shengbiao, Wang Jiyang. 2010. Hydrocarbon generation kinetic parameters of organic matter: review and outlook. Progress in Geophysics (in Chinese), 25(4): 1424-1432

Tang Y C, Stauffer M. 1994. Multiple cold trap pyrolysis gas chromatography: a new technique for modeling hydrocarbon generation. Org Geochem, 22(3-5): 863-872

Tang Y C, Perry J K, Jenden P D, et al. 2000. Mathematical modeling of stable carbon isotope ratios in natural gases. Geochimica et Cosmochimica Acta, 64(15): 2673-2687

Tian Hui, Xiao Xianming, Ronald W T, et al. 2008. New insights into the volume and pressure changes during the thermal cracking of oil to gas in reservoirs: Implications for the in-situ accumulation of gas cracked from oils. AAPG Bulletin, 92(2): 181-200

Wang Zhenfeng, Gan Huajun, Wang Hua, et al. 2014. Paleogene sequence stratigraphy and source rock distribution in the deep water area, Qiongdongnan Basin. China Offshore Oil and Gas (in Chinese), 26(1): 9-16

Zhu Weilin. 2009. Some key geological issues on oil and gas exploration in the northern deepwater area of the South China Sea. Acta Geologica Sinica (in Chinese), 83(8): 1059-1064

Zhu Weilin, Huang Baojia, Mi Lijun, et al. 2009. Geochemistry, origin, and deep-water exploration potential of natural gases in the Pearl River Mouth and Qiongdongnan Basins, South China Sea. AAPG Bulletin, 93(6): 741-761

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1390
HTML全文浏览量: 52
PDF下载量: 1118
被引次数: 0

琼东南盆地深水区烃源岩生烃动力学及生气模式

doi: 10.1007/s13131-015-0646-3

计量

出版历程

Kinetics and model of gas generation of source rocks in the deepwater area, Qiongdongnan Basin

计量

出版历程

目录