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不同热模拟方式下烃源岩干酪根演化特征红外光谱分析

余晓露 马中良 郑伦举 赵中熙

余晓露, 马中良, 郑伦举, 赵中熙. 不同热模拟方式下烃源岩干酪根演化特征红外光谱分析[J]. 石油实验地质, 2017, 39(1): 134-140. doi: 10.11781/sysydz201701134
引用本文: 余晓露, 马中良, 郑伦举, 赵中熙. 不同热模拟方式下烃源岩干酪根演化特征红外光谱分析[J]. 石油实验地质, 2017, 39(1): 134-140. doi: 10.11781/sysydz201701134
Yu Xiaolu, Ma Zhongliang, Zheng Lunju, Zhao Zhongxi. FTIR analyses of source rock kerogen from different hydrous pyrolysis experiments[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 134-140. doi: 10.11781/sysydz201701134
Citation: Yu Xiaolu, Ma Zhongliang, Zheng Lunju, Zhao Zhongxi. FTIR analyses of source rock kerogen from different hydrous pyrolysis experiments[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(1): 134-140. doi: 10.11781/sysydz201701134

不同热模拟方式下烃源岩干酪根演化特征红外光谱分析

doi: 10.11781/sysydz201701134
基金项目: 中国石油化工股份有限公司科技攻关项目“烃源岩有限空间生排烃机理研究与应用”(P11060)和“烃源岩油气形成新机制与评价体系研究”(P14040)资助。
详细信息
    作者简介:

    余晓露(1983-),女,硕士,工程师,从事石油地质和油气地球化学研究。E-mail:yuxl.syky@sinopec.com。

  • 中图分类号: TE135

FTIR analyses of source rock kerogen from different hydrous pyrolysis experiments

  • 摘要: 烃源岩的生烃过程是在地层孔隙空间内有机质受温度、上覆岩层静岩压力和高地层流体压力(PVT-L共控)等多种作用下的一种复杂的物理化学反应过程。然而目前常用的生烃模拟实验(高压釜加水生烃模拟)大多是在一个低流体压力、无静岩压力、相对较大的生烃空间下进行的,与实际地质情况差异较大。选用南襄盆地泌阳凹陷核三段未熟泥岩分别开展了PVT-L共控和常规高压釜方式加水模拟实验,不同演化阶段干酪根的傅里叶变换红外光谱对比分析表明:(1)伴随着脂族结构裂解、含氧基团脱落及芳香结构缩合,干酪根演化明显呈现出缓慢生油、快速生油和结束生油3个阶段;(2)脂肪度参数IAL、饱芳比参数IL/R和含氧度参数IO表明,同等温度条件下常规高压釜加水模拟脂肪链和含氧基团的热裂解反应更为剧烈,PVT-L共控模拟则相对平缓,380℃时仍伴随有较强的生烃能力;(3)PVT-L共控模拟条件下饱和烃的芳构化程度更低,可能与其限定空间内较高的流体压力有关;(4)含氧度在成熟中期间歇的轻微增大,暗示水对干酪根生烃过程也许有重要的作用。2种不同模拟方式下干酪根红外光谱特征上的差别,暗示其在生烃反应机理上存在较大差异,在热模拟实验研究中要根据研究目的合理选择模拟方式,设置实验条件。

     

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出版历程
  • 收稿日期:  2016-06-27
  • 修回日期:  2016-11-09
  • 刊出日期:  2017-01-28

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