Journal of Jilin University(Earth Science Edition) ›› 2018, Vol. 48 ›› Issue (6): 1645-1653.doi: 10.13278/j.cnki.jjuese.20170173

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Quantitative Method of Crushed Gas in Shale and Its Geological Significance

Wang Taoli1,2, Wang Qingtao1, Liu Wenping3,4, Lu Hong1, Liu Dayong1   

  1. 1. State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Exploration and Development Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu 610051, China;
    4. Sichuan Province Key Laboratory of Shale Gas Evaluation & Exploitation, Chengdu 610051, China
  • Received:2017-06-21 Published:2018-11-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41602130), Natural Science Foundation of Guangdong Province (2016A030310116), Strategic Priority Research Program of the Chinese Academy of Sciences (Class B) (XDB10010501), and Strategic Priority Research Program of the Chinese Academy of Sciences (Class A) (XDA14010102)

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Abstract: A device was designed and manufactured to release the crushed gas in shales under vacuum. The gas from this device was geochemically and quantitatively analyzed by the device combined with the enrichment module and gas chromatography. Meanwhile, the comprehensive chemical composition and the stable carbon isotopic composition were obtained through analyzing the gas sealed in the glass tube. With the mixed standard gases calibrating, the correlation coefficient between concentrations of organic and inorganic gases and gas chromatographic response reached 0.999, which indicates that the device is stable for a quantitative analysis of the crushed gas. The result showed a good parallelism between the gas yields and stable carbon isotope values when the different outcrop shales (the Lower Silurian Longmaxi Formation in Xishui County, Guizhou, the Lower Cambrian Niutitang Formation in Mufu Mountain, Nanjing and Upper Triassic Yanchang Formation in Yan'an, Shaanxi) were analyzed, and reported the chemical and stable carbon isotopic compositions of the crushed gases of the core samples from the Lower Silurian Longmaxi Formation, southern Sichuan basin. The results revealed that the crushed gases are mainly inorganic gases (N2 and CO2) with a little hydrocarbon gas that are mainly composed of CH4 and extremely low content of C2H6 and C3H8. The δ13C1 values of crushed gas range from -38.1‰ to -33.9‰ with a mean value of -35.8‰, which is similar to the value of shale gas in the same area proposed by previous studies. In addition, the crushed gas of shale at low depths of (20-46) m showed a weakly positive relationship between the yield of crushed gas and w(TOC) values/carbonate content, while a negative correlation between the yields of crushed gas with DFT surface area and BJH pore volume. This suggests that the commercial shale gas is possibly originated from the Lower Silurian Longmaxi Formation, corresponding to the strict definition of shale gas. Hence, the crushed gases are neither adsorbed nor dissociated in shale gas reservoir, but sealed up in the enclosed pores in shales.

Key words: crushed gas, quantitative, gas source, stable carbon isotope, shale gas

CLC Number: 

  • P593
[1] 曹春辉,张铭杰,汤庆艳,等. 四川盆地志留系龙马溪组页岩气气体地球化学特征及意义[J]. 天然气地球科学,2015,26(8):1604-1612. Cao Chunhui, Zhang Mingjie, Tang Qingyan, et al. Geochemical Characteristics and Implications of Shale Gas in Longmaxi Formation, Sichuan Basin, China[J]. Natural Gas Geoscience, 2015, 26(8):1604-1612.
[2] 聂海宽,唐玄,边瑞康. 页岩气成藏控制因素及中国南方页岩气发育有利区预测[J]. 石油学报,2009,30(4):484-491. Nie Haikuan, Tang Xuan, Bian Ruikang. Controlling Factors for Shale Gas Accumulation and Prediction of Potential Development Area in Shale Gas Reservoir of South China[J]. Acta Petrolei Sinica, 2009, 30(4):484-491.
[3] 邹才能,董大忠,杨桦,等. 中国页岩气形成条件及勘探实践[J]. 天然气工业,2011,31(12):26-40. Zou Caineng, Dong Dazhong, Yang Hua, et al. Conditions of Shale Gas Accumulation and Exploration Practices in China[J]. Natural Gas Industry, 2011, 31(12):26-40.
[4] 冯小龙,敖卫华,唐玄. 陆相页岩气储层孔隙发育特征及其主控因素分析:以鄂尔多斯盆地长7段为例[J]. 吉林大学学报(地球科学版),2018,48(3):678-692. Feng Xiaolong, Ao Weihua, Tang Xuan. Characteristics of Pore Development and Its Main Controlling Factors of Continental Shale Gas Reservoirs:A Case Study of Chang7 Member in Ordos Basin[J]. Journal of Jilin University (Earth Science Edition), 2018, 48(3):678-692.
[5] Zhang T W, Yang R S, Milliken K L, et al. Chemical and Isotopic Composition of Gases Released by Crush Methods from Organic Rich Mudrocks[J]. Organic Geochemistry, 2014, 73:16-28.
[6] 李玉喜,乔德武,姜文利,等. 页岩气含气量和页岩气地质评价综述[J]. 地质通报,2011,30(2/3):308-317. Li Yuxi, Qiao Dewu, Jiang Wenli, et al. Gas Content of Gas-Bearing Shale and Its Geological Evaluation Summary[J]. Geological Bulletin of China, 2011, 30(2/3):308-317.
[7] 史宝光,沈平,王晓锋,等. 岩石解析气实验新方法对气源对比研究的突破[J]. 科学通报,2013,58(5/6):479-484. Shi Baoguang, Shen Ping, Wang Xiaofeng, et al. Groundbreaking Gas Source Rock Correlation Research Based on the Application of a New Experimental Approach for Adsorbed Gas[J]. Chinese Science Bulletin, 2103, 58(5/6):479-484.
[8] 魏强,晏波,肖贤明. 页岩气解吸方法研究进展[J]. 天然气地球科学,2015,26(9):1657-1665. Wei Qiang, Yan Bo, Xiao Xianming. Research Progress on the Desorption Methods of Shale Gas[J]. Natural Gas Geoscience, 2015, 26(9):1657-1665.
[9] Tang Q Y, Zhang M J, Cao C H, et al. The Molecular and Carbon Isotopic Constrains on Origin and Storage of Longmaxi Formation Shale Gas in Changning Area, Sichuan Basin, China[J]. Interpretation, 2015, 5:SJ35-SJ47.
[10] Wu C J, Tuo J C, Zhang M F, et el. Sedimentary and Residual Gas Geochemical Characteristics of the Lower Cambrian Organic-Rich Shales in Southeastern Chongqing, China[J]. Marine and Petroleum Geology, 2016, 75:140-150.
[11] Wang Q T, Lu H, Shen C C, et al. Impact of Inorganically Bound Sulfur on Late Shale Gas Generation[J]. Energy Fuels, 2014, 28:785-793.
[12] 杨珊. 页岩中微量元素地球化学特征及过渡金属矿物对页岩气生成的影响[D]. 北京:中国科学院大学,2015. Yang Shan. Geochemical Characterization of Trace Elements in Shale and Effects of Transition Metal Minerals on the Generation of Shale Gas[D]. Beijing:University of Chinese Academy of Sciences, 2015.
[13] 刘岩,周文,邓虎成. 鄂尔多斯盆地上三叠统延长组含气页岩地质特征及资源评价[J]. 天然气工业,2013,33(3):19-23. Liu Yan, Zhou Wen, Deng Hucheng. Geological Characteristics of Gas-Bearing Shales in the Yanchang Formation and Its Resource Assessment in the Ordos Basin[J]. Natural Gas Industry, 2013, 33(3):19-23.
[14] Dai J X, Zou C N, Liao S M, et al. Geochemistry of the Extremely High Thermal Maturity Longmaxi Shale Gas, Southern Sichuan Basin[J]. Organic Geochemistry, 2014, 74:3-12.
[15] 王哲,李贤庆,张吉振,等. 四川盆地不同区块龙马溪组页岩气地球化学特征对比[J]. 中国煤炭地质,201628(2):22-27. Wang Zhe, Li Xianqing, Zhang Jizhen, et al. Longmaxi Formation Shale Gas Geochemical Features Comparison Between Different Blocks in Sichuan Basin[J]. Coal Geology of China, 2016, 28(2):22-27.
[16] 高波. 四川盆地龙马溪组页岩气地球化学特征及其地质意义[J]. 天然气地球科学,2015,26(6):1173-1182. Gao Bo. Geochemical Characteristics of Shale Gas from Lower Silurian Longmaxi Formation in the Sichuan Basin and Its Geological Singnificance[J]. Natural Gas Geoscience, 2015, 26(6):1173-1182.
[17] Baxby M, Patience R L, Bartle K D. The Origin and Diagenesis of Sedimentary Organic Nitrogen[J]. Journal of Petroleum Geology, 1994, 17(2):211-230.
[18] Krooss B M. Littke R, Miiller B, et al. Generation of Nitrogen and Methane from Sedimentary Organic Matter:Implications on the Dynamics of Natural Gas Accumulations[J]. Chemical Geology, 1995, 126:291-318.
[19] 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,1993,4(2/3):1-40. Dai Jinxing. Geochemical Characteristics of Carbon and Hydrogen for Natural Gas and Identification for Different Types of Natural Gas[J]. Natural Gas Geoscience, 1993, 4(2/3):1-40.
[20] Loucks R G, Reed R M, Ruppel S C, et al. Spectrum of Pore Types and Networks in Mudrocks and a Descriptive Classification for Matrix-Related Mudrock Pores[J]. AAPG Bulletin, 2012, 96(6):1071-1098.
[21] 张晓明,石万忠,徐清海,等. 四川盆地焦石坝地区页岩气储层特征及控制因素[J]. 石油学报,2015,36(8):926-940. Zhang Xiaoming, Shi Wanzhong, Xu Qinghai, et al. Reservoir Characteristics and Controlling Factors of Shale Gas in Jiaoshiba Area, Sichuan Basin[J]. Acta Petrolei Sinica, 2015, 36(8):926-940.
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