渤海海域渤中地区烃源岩封闭金管热解模拟生烃实验研究

发布时间：2018-01-09 23:14

本文关键词：渤海海域渤中地区烃源岩封闭金管热解模拟生烃实验研究　出处：《石油实验地质》2017年03期 　论文类型：期刊论文

【摘要】：选取渤海海域渤中地区沙南凹陷沙三段、沙一段和东三段烃源岩各1个样品,秦南凹陷沙三段烃源岩2个样品,进行封闭金管加水热解实验。烃源岩样品为湖相泥岩,有机质丰度高,干酪根类型为Ⅰ型,且处于低熟阶段。烃源岩矿物组成以黏土矿物为主,方解石、石英和长石也占有相当的比重。热解过程涵盖了主要的生油阶段,沙三段、沙一段和东三段烃源岩平均生烃活化能集中分布在219~222 k J/mol,同一凹陷不同层系、不同凹陷同一层系差别不大,但黏土矿物含量较低和方解石含量较高的样品平均活化能略偏高。封闭热解生烃高峰C_(14+)液态烃产物碳同位素相比原岩沥青"A"碳同位素增重幅度可达11.3%,应用低熟源岩沥青"A"碳同位素进行油源对比时须谨慎。残余固体总有机碳损失可达48%,对原本有机质丰度高和类型好、现处于高演化阶段的烃源岩评价时,有必要进行有机质丰度和类型的恢复。
[Abstract]:Select the Bohai sea area in Bohai Shanan sag in Sha three section, Es1 and East three hydrocarbon source rocks of the 1 samples, 2 samples of Qinnan depression three hydrocarbon source rocks, closed gold tube pyrolysis experiment. Water source rock samples for lacustrine mudstone, high organic matter abundance, kerogen type I, and in the low mature stage. Hydrocarbon source rock minerals are mainly composed of clay minerals, calcite, quartz and feldspar are considerable proportion. The pyrolysis process covers the main source, Sha three section, Es1 and East three hydrocarbon source rocks of the average hydrocarbon activation energy is concentrated in 219~222 K J/mol, the same depression of different strata, different sag little difference in the same layer, but lower content of clay minerals and calcite content of samples with higher average activation energy is slightly higher. Closed pyrolysis hydrocarbon generation peak C_ (14+) carbon isotope liquid hydrocarbon products compared to the original rock asphalt "A" carbon isotope weight amplitude Up to 11.3%, to be cautious of oil source correlation of carbon isotope application of low mature source rock asphalt "A". The total organic carbon loss up to 48% of the original residual solid, high organic matter abundance and type, is now in the evaluation of source rocks in high evolution stage, it is necessary to carry out the organic abundance and type of recovery.

【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项“渤海海域已证实的富生烃凹陷再评价及新领域勘探方向”(2011ZX05023-001-004)资助
【分类号】：P618.13
【正文快照】： 渤海海域渤中地区包含渤中凹陷、沙南凹陷和秦南凹陷等8个负向二级构造单元[1]。渤中凹陷等一些主要凹陷获得了良好的勘探成果,而沙南凹陷等一些边缘凹陷勘探成效不佳。如何建立渤中地区烃源岩生烃动力学参数,从而使资源量的预测更加可靠?不同凹陷的烃源岩生烃动力学参数有何

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