第 43 卷第 5 期 Vol.43, No.5, 502 509 2014 年 9 月 GEOCHIMICA Sept., 2014 - 颜永何 1,2, 邹艳荣 1*, 屈振亚 1,2, 蔡玉兰王绪龙 3, 潘长春 1 1, 彭平安 (1., 510640; 2., 100049; 3., 841000) 摘要 : -,, -,,, -,,, - ( 264 Ma ),, ( 61 Ma ) 232~196 Ma, 196~178 Ma, 关键词 : ; ; ; 中图分类号 : P597 文献标识码 : A 文章编号 : 0379-1726(2014)05-0502-08 Characteristics and hydrocarbon generation kinetics of the Carboniferous source rocks in the Ludong-Wucaiwan area, the Junggar Basin YAN Yong-he 1,2, ZOU Yan-rong 1*, QU Zhen-ya 1,2, CAI Yu-lan 1, WANG Xu-long 3, PAN Chang-chun 1 and PENG Ping-an 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, PetroChina Xinjiang Oilfield Company, Karamay 841000, China Abstract: There are good exploration prospects of petroleum from the Carboniferous source rocks in the Ludong-Wucaiwan area, the Junggar Basin. Routine analysis was carried out to evaluate the Carboniferous source rock samples collected from the Ludong-Wucaiwan area. The results show that the Carboniferous source rocks have high abundance, wide maturity range from mature to high mature, and the source rock have organic matter with Type Ⅲ kerogen. Further kinetic study was performed by using open system pyrolysis to elucidate the characteristics of the hydrocarbon generation. The tries on the hydrocarbon generation process of the matured source rocks and the estimation of liquid hydrocarbon expulsion from type Ⅲ kerogen are conducted, and hydrocarbon yield of Carboniferous hydrocarbon source rocks was calculated. The results show that the hydrocarbon-generation started in the Permian (about 264 Ma), and ended in the early Paleogene (about 61 Ma), since the strata uplifted. The Lower Carboniferous hydrocarbon source rocks, which have large hydrocarbon yield, expulsed the liquid hydrocarbon from 232 Ma to 196 Ma. The Upper Carboniferous hydrocarbon source rocks, which have small hydrocarbon yield, expulsed the liquid hydrocarbon from 196 Ma to 178 Ma. However, the 1, 收稿日期 (Received): 2013-08-20; 改回日期 (Revised): 2013-10-30; 接受日期 (Accepted): 2014-04-15 基金项目 : (2011ZX05008-002) 作者简介 : (1989 ),,, E-mail: yanyong.he@163.com * 通讯作者 (Corresponding author): ZOU Yan-rong, E-mail: zouyr@gig.ac.cn; Tel: +86-20-85290187 Geochimica Vol. 43 No. 5 pp. 502 509 Sept., 2014
第 5 期颜永何等 : 准噶尔盆地陆东 - 五彩湾石炭系烃源岩特征及生烃动力学研究 503 natural gas generated relatively late from the Upper Carboniferous, which is beneficial to be preserved. The natural gas probably derived from the Upper Carboniferous source rocks. Key words: Carboniferous; source rocks; hydrocarbon generation kinetics; Junggar Basin 0, [1],,,, [2], [3], [4],,,, [5] [2,6 9],, Rock-Eval TOC, [10], - -,, 1 ( 1),, 8 5 ; (C 2 b) (C 1 d) (LECO CS-230), Rock-Eval 6,, Rock-Eval 6 Table 1 表 1 石炭系烃源岩样品基本地球化学参数 The basic geochemical parameters of the Carboniferous source rocks (m) S 1 S 2 S 3 T max ( ) I H I O B012 C 2 b / 0.05 2.82 1.60 435 200 113 1.41 B013 C 2 b / 0.07 2.16 1.20 438 168 93 1.29 B014 C 2 b / 0.06 2.08 1.18 435 150 85 1.39 S003 C 1 d / 1.24 3.32 0.80 463 68 16 4.85 S014 C 1 d / 1.30 1.55 0.18 465 86 10 1.81 S039 C 1 d / 1.24 2.06 0.40 467 81 16 2.56 S053 C 1 d / 0.72 1.42 0.36 459 84 21 1.70 S058 C 1 d / 0.72 1.44 0.51 459 85 30 1.68 DX8-1 8 C 2 3107.5 1.37 10.78 0.20 450 147 3 7.34 DX8-2 8 C 2 3605.6 0.43 3.68 0.15 453 106 4 3.47 DX8-7 8 C 2 3511.8 3.62 31.42 0.36 446 238 3 13.19 Q5-1 5 C 2 2140.6 0.08 1.78 0.18 453 47 5 3.80 Q5-2 5 C 2 2572.8 0.06 0.64 0.09 459 44 6 1.45 Q5-3 5 C 2 2573.7 0.04 0.45 0.12 461 45 12 0.99 TOC (%) YAN Yong-he et al.: Characteristics and hydrocarbon generation kinetics
504 2014 年, 3 /min, 25 /min, 30 /min; Kinetics 2000 2 2.1, (TOC) (S 1 +S 2 ) ( 1), TOC 0.99%~13.19%, 3.35% S 1 +S 2 0.49~35.04 mg/g, 5.47 mg/g, TOC 1%, 2 mg/g; TOC 3.81%, 6.84 mg/g, TOC 2.52%, 3 mg/g [11], -,, [12],,,, [13] I H 44~238 mg/g, T max 435~467,, T max, Cornord [14] ( 1) 1, Ⅲ ( Ⅱ 2 -Ⅲ ), [2,5 9], Ⅲ T max 435~467 之间 ( 1), (I H ) ( 1) (I O ) 3~8 ( 1), / 2.2 2.2.1 生烃模拟样品的选取,, 1 I H -T max Fig.1 I H vs. T max plot of the Carboniferous source rocks, [15],, 1,, [16 17],,, ( 1),,, B012, (T max =435 ), 2.2.2 烃源岩的动力学特征 [18], Kinetics 2000 2 2a, A=3.72 10 14 s 1,, (45~69) 4.1840 kj/mol, 54 4.1840 kj/mol [10,19], (40~64) 4.1840 kj/mol Geochimica Vol. 43 No. 5 pp. 502 509 Sept., 2014
第 5 期颜永何等 : 准噶尔盆地陆东 - 五彩湾石炭系烃源岩特征及生烃动力学研究 505, (47~71) 4.1840 kj/mol,,, [16 17] 2b,, 2 (a) (b) Fig.2 The activation energy distribution (a) and modeling result (b) for hydrocarbon generation kinetic of the sample pyrolysised in open system 2.3 -, [15,18], : (1),, ( 3) (2),, 50 /km, 25 /km, [4] 9 [20],,,, [4] [6],,, -, Easy%Ro -, ; Housekneclit et al. [21], : ( 0.10~0.25) ( 0.25~ 0.65) ( 0.65~0.90) - 4,, R o 0.1 R o = 0.6%,, Easy%Ro,,, R o, R o = 0.6%, (C 1 d) 264 Ma, C 1 d (C 2 b ) 256 Ma, (C 2 b) 246 Ma, (C 2 b),,, 61 Ma( ),, ( 4), (C 1 d) 0.93, R o = 1.75%, C 1 d C 2 b 0.91 0.88, R o 1.53% 1.36%( 2),, 4,, YAN Yong-he et al.: Characteristics and hydrocarbon generation kinetics
506 2014 年 3 - ( [6] ) Fig.3 The burial history in the Ludong-Wucaiwan area (revised from Guo et al. [6] ) Fig.4 4 - The hydrocarbon generation history of Carboniferous source rock in the Ludong-Wucaiwan area,,,,, Geochimica Vol. 43 No. 5 pp. 502 509 Sept., 2014
第 5 期颜永何等 : 准噶尔盆地陆东 - 五彩湾石炭系烃源岩特征及生烃动力学研究 507 表 2 陆东 - 五彩湾地区不同埋深烃源岩生烃史模拟结果 Table 2 The modeling result of the hydrocarbon generation history of source rocks of the different depths in the Ludong-Wucaiwan area (Ma) R o (Ma) R o C 2 b 235 0.68% 61 1.36% 0.88 C 1 d /C 2 b 248 0.66% 61 1.53% 0.91 C 1 d 256 0.68% 61 1.75% 0.93,, Pepper et al. [22], 0.10,, 256 248 235 Ma, R o 0.68% 0.66% 0.68%( 2) R o 0.6%~1.3%, Housekneclit et al. [21] ( 4) [23] 2 -,,, Pepper et al. [24], 200 mg/g, ( 3), 2 - (R o =0.9%), - 232~196 Ma, 196~178 Ma ( 4) 表 3 陆东 - 五彩湾地区产烃率预测 Table 3 The forecasts of the hydrocarbon yield in the Ludong-Wucaiwan area TOC (%) C 2 b 170.7 1.41 2.41 C 1 d /C 2 b 174.6 1.41 2.46 C 1 d 180.8 1.41 2.55 2.4, [25] (SR) (HC), C 2 b : 4, 0.88, 170.7 mg/g, 1.41%, 2.41 mg/g ( 3) 3, 2.41~2.46 mg/g, 2.46~2.55 mg/g,, [26] [26], 1, 25, 88%, -,,,,, [26], -, ; -,, 61 Ma( ),, 3 -, -,, Ⅲ, - I H -T max Ⅲ,, YAN Yong-he et al.: Characteristics and hydrocarbon generation kinetics
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