HYDROCARBON GENERATION POTENTIAL OF BEIPIAO FORMATION FROM LLD1 WELL IN NIUYINGZI BASIN, WESTERN LIAONING
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摘要:
通过岩石热解、饱和烃色谱-质谱、镜质体反射率等分析测试，对辽西牛营子盆地辽凌地1井侏罗系北票组烃源岩的有机质丰度、类型及成熟度进行了详细分析，综合评价了其生烃潜力.研究结果表明，侏罗系北票组有机碳含量分布在0.75%~37.9%，平均值为11.68%，有机质类型为Ⅲ型和Ⅱ2型，镜质体反射率Ro主要分布于0.57%~0.62%之间，平均为0.60%，属于低成熟演化阶段.综合评价认为，牛营子盆地侏罗系北票组具有一定的生烃潜力.
Abstract:Through analysis of rock pyrolysis, saturated hydrocarbon gas chromatography-mass spectrometry and vitrinite reflectance (Ro), the paper studies the abundance, types and maturity of organic matters in the source rocks of Jurassic Beipiao Formation from LLD1 well of Niuyingzi Basin in western Liaoning, and comprehensively evaluates the hydrocarbon generation potential. The results show the TOC is 0.75%-37.9%, averagely 11.68%, with the Ⅲ- and Ⅱ2-type of organic matters. The Ro values mainly range from 0.57% to 0.62%, averagely 0.60%, belonging to the low maturity stage. From the above, it is concluded that the Jurassic Beipiao Formation in Niuyingzi Basin has certain hydrocarbon generation potential.
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Key words:
- hydrocarbon generation potential /
- source rock /
- LLD1 well /
- Beipiao Formation /
- Niuyingzi Basin
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表 1 北票组烃源岩地球化学分析数据表
Table 1. Geochemical analysis data of Beipiao Formation source rocks
样品编号 TOC/% (S1+S2)/10-3 氯仿沥青"A"/% TI Tmax /℃ Ro /% LLD1-1534.2 5.25 17.79 0.047 25.3 437 0.62 LLD1-1538.5 3.68 14.31 0.528 12 432 0.62 LLD1-1545 1 4.35 0.034 -35.25 436 0.57 LLD1-1560 4.45 4.4 0.061 -14 432 0.57 LLD1-1570 2.9 0.96 0.019 -8.75 428 0.59 LLD1-1584 1.84 9.71 0.078 -4.5 430 0.59 LLD1-1598 5.52 1.57 0.053 8.75 429 0.61 LLD1-1620 6.09 52.86 0.088 -15.75 418 0.59 LLD1-1644 18.47 128.25 0.115 -25.75 419 0.59 LLD1-1669 11.93 45.43 0.158 -29.5 446 0.6 LLD1-1679 11.2 46.91 0.169 -27.75 424 0.62 LLD1-1688 25.58 177.61 0.214 -39.75 419 0.62 测试单位:长江大学油气资源与勘探技术教育部重点实验室. 
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表 2 有机质丰度评价标准
Table 2. Evaluation criteria for organic matter abundance of source rocks
指标 湖盆水体类型 非生油岩 生油岩类型 差 中等 好 最好 TOC/% 淡水-半咸水 < 0.4 0.4~0.6 > 0.6~1.0 > 1.0~2.0 > 2.0 咸水-超咸水 < 0.2 0.2~0.4 > 0.4~0.6 > 0.6~0.8 > 0.8 氯仿沥青“A”/% < 0.015 0.015~0.050 > 0.050~0.100 > 0.100~0.200 > 0.200 HC/10-6 < 100 100~200 > 200~500 > 500~1000 > 1000 (S1+S2)/10-3 < 2 2-6 > 6-20 > 20
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表 3 干酪根类型指数分类表
Table 3. Classification of kerogen types
干酪根类型 Ⅰ Ⅱ1 Ⅱ2 Ⅲ TI TI≥80 40≤TI＜80 0≤TI＜40 TI＜0
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