基于拉曼光谱的储层沥青热演化特征及其判别

doi:10.3964/j.issn.1000-0593(2022)03-0783-05

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Abstract To determine the relationship between the thermal evolution degrees and Raman spectra of reservoir bitumens, bitumen from the reservoir in the Baiceng area of Southwest Guizhou Province was quantitatively analyzed using non-destructive Raman spectroscopy and fluid inclusion. Firstly, the homogenization temperature of fluid inclusions associated with the reservoir bitumen was obtained. The Raman spectrum of the bitumen was then obtained and compared with the maturity distribution standard for bitumen to determine the homogenization temperature, thermal evolution degree, and characteristics of the bitumen in the study. The results indicate that hydrocarbon reservoir charging events occurred in the Baiceng area of Southwest Guizhou in the Late Triassic (230 Ma) and Oligocene (30 Ma) and that the hydrocarbon-forming fluid had the characteristics of multi-stage hydrocarbon accumulation, these two oil and gas charging events are the ultimate source of reservoir bitumen in this area. Bitumen is the natural cracking product formed by the thermal metamorphism of oil. With the increase of burial depth, bitumen is continuously polymerized or carbonized. The formation of reservoir bitumen is accompanied by two stages of aqueous thermal fluid events, and the homogenization temperatures of aqueous inclusions are 93.5～96.7 and 101.2～103.7 ℃. The results show that the Raman shift range of D peak is 1 334～1 346 cm^-1, the Raman shift range of G peak is 1 607～1 610 cm^-1, the difference G-D is 264～275 cm^-1, and the D_h/G_h value is 0.552～0.573. According to the bitumen maturity distribution chart, the bitumen in the reservoir has reached the over-mature stage. The energy intensity ratio of D peak to G peak (R₁) is 0.573，the full width at a half ratio of D peak to G peak（R₂） is 1.688～1.945，and the ratio of D peak to the (D+G) integral peak area (R₃) is 0.68~0.72. The Raman spectrum analysis indicates that the fluid temperature of the regional paleo reservoir is 122.78~164.31 ℃. The reservoir bitumen in the Baiceng area of Southwest Guizhou is derived from allochthonous migration-type organic matter. The similarities in laser Raman spectrum characteristics indicate that the reservoir bitumen samples have the same origin. They are products of the transformation of oil and gas materials that escaped from the preexisting paleo reservoir along the ore-controlling structure in the study area. Finally, the relationship between the Raman spectrum and thermal evolution of bitumen is determined, providing a theoretical basis for studying the evolution of ancient reservoir oil into reservoir bitumen.

Key words：Southwest Guizhou; Reservoir bitumen; Fluid inclusions; Laser Raman; Homogenization temperature

Received: 2021-02-17 Accepted: 2021-06-17

ZTFLH:

O657.3

Cite this article:

SI Shang-hua^1,2,YANG Zhe-heng^{1, et al. Thermal Evolution Characteristics and Discrimination of Reservoir Bitumen Based on Raman Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(03): 783-787.}

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2022)03-0783-05 OR https://www.gpxygpfx.com/EN/Y2022/V42/I03/783

[1] XIAO Xian-ming, ZHOU Qin, CHENG Peng, et al（肖贤明, 周秦, 程鹏, 等）. SCIENTIA SINICA Terrae（中国科学: 地球科学）, 2020, 50(9): 1228.
[2] TIAN Jian-zhang, CHEN Yong, HOU Feng-xiang，et al（田建章, 陈勇, 侯凤香, 等）. Spectroscopy and Spectral Analysis（光谱学与光谱分析）, 2021, 41(1): 131.
[3] GU Xue-xiang，ZHANG Yong-mei，WU Cheng-yun，et al （顾雪祥, 章永梅, 吴程赟, 等）. Earth Science Frontier（地球科学前沿）, 2013, 20(1): 92.
[4] QIN Qin，LONG Cheng-xiong，ZHANG Ben-jie（秦琴, 龙成雄, 张本杰）. Natural Gas Technology and Economy（天然气技术与经济）, 2016, 10(2): 13.
[5] LUO Sha，WANG Ling-xia，SHI Fu-lun，et al（罗沙, 汪凌霞, 石富伦, 等）. Science Technology and Engineering（科学技术与工程）, 2017, 17(22): 162.
[6] ZHONG Fang-de（钟方德）. Coal Geology of China（中国煤炭地质）, 2018, 30(2): 39.
[7] WANG Ke-ying，YUAN Kun，GONG Shu-hua，et al（王克营, 苑坤, 巩书华, 等）. Coal Technology（煤炭技术）, 2018, 37(4): 99.
[8] XU Qing（徐卿）. Coal Geology of China（中国煤炭地质）, 2017, 29(5): 20.
[9] LI Yong，CHEN Shi-jia，YIN Xiang-dong，et al（李勇, 陈世加, 尹相东, 等）. Journal of Jilin University·Earth Science Edition（吉林大学学报·地球科学）, 2020, 50(3): 732.
[10] LIU Lu，HU Yu-zhao，ZHANG Gui-quan（刘路, 胡煜昭, 张桂权）. Geological Review（地质论评）, 2016, 62(4): 1010.
[11] ZHANG Nai，TIAN Zuo-ji，MAO Guang-jian，et al（张鼐, 田作基, 毛光剑, 等）. Geochimica（地球化学）, 2009, 38(2): 174.
[12] JIN Xiao-ye，LI Jian-wei，Hofstra A，et al（靳晓野, 李建威, Hofstra A, 等）. Acta Petrologica Sinica（岩石学报）, 2016, 32(11): 3295.
[13] Rahl J M，Anderson K M，Brandon M T，et al. Earth and Planetary Science Letters（地球与行星科学通讯），2005，240(2): 339.
[14] ZHUANG Xin-guo(庄新国). Mineral Deposits（矿床地质），1995，14(1): 82.
[15] WANG Mao-lin，XIAO Xian-ming，WEI Qiang, et al（王茂林, 肖贤明, 魏强, 等）. Natural Gas Geoscience（天然气地球科学）, 2015, 26(9): 1712.