吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (1): 29-38.doi: 10.13278/j.cnki.jjuese.20160296
都鹏燕1,2, 高岗1, 魏涛3, 赵乐义3, 杨军3, 李涛3, 王建国3
Du Pengyan1,2, Gao Gang1, Wei Tao3, Zhao Leyi3, Yang Jun3, Li Tao3, Wang Jianguo3
摘要: 对雅布赖盆地萨尔台凹陷侏罗系新河组有效烃源岩进行有机质下限分析,识别有效烃源岩分布范围,并分析有效烃源岩下限值与成熟度的关系。本文据烃源岩生排烃机理,通过w(TOC)与热解参数w(S1)之间的关系,确定了雅布赖盆地萨尔台凹陷新河组下段有效烃源岩w(TOC)下限值,其中盐场次凹有效烃源岩w(TOC)下限值为1.0%,小湖次凹w(TOC)下限值为0.7%,梭托次凹不具备排烃条件。利用△log R法计算新河组下段的页岩w(TOC)含量,识别并统计了单井有效烃源岩厚度,参照沉积相和地层厚度确定了有效烃源岩的分布特征,新河组下段有效烃源岩主要分布在小湖次凹中央洼槽带,累计厚度最大约600 m,盐场次凹有效烃源岩累计厚度基本小于100 m,梭托次凹不发育有效烃源岩。成熟度越大,有效烃源岩w(TOC)下限值越小
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