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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2012  >  34(2): 215-222
Lu Longfei, Cai Jingong, Liu Wenhui, Tenger, Hu Wenxuan. Infra-red emission spectroscopy study of thermal evolution of organic matter bound by clay minerals in muddy hydrocarbon source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2012, 34(2): 215-222. doi: 10.11781/sysydz201202215
Citation: Lu Longfei, Cai Jingong, Liu Wenhui, Tenger, Hu Wenxuan. Infra-red emission spectroscopy study of thermal evolution of organic matter bound by clay minerals in muddy hydrocarbon source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2012, 34(2): 215-222. doi: 10.11781/sysydz201202215
shu

Infra-red emission spectroscopy study of thermal evolution of organic matter bound by clay minerals in muddy hydrocarbon source rocks

doi: 10.11781/sysydz201202215
  • 1.

    School of Earth Science, Nanjing University, Nanjing, Jiangsu 210093, China

  • 2. SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

  • 3. Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

  • 4. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China

  • Received Date: 2011-07-25
  • Rev Recd Date: 2012-02-27
  • Publish Date: 2012-03-28
    Abstract
  • To examine the thermal evolution of and the influence of organo-clay interaction on organic matter bound by clay minerals in muddy source rocks,we studied the <2μm particle-size fractions extracted from hydrocarbon source rocks in Neocene,Jiyang Depression,eastern China,using infra-red emission spectroscopy(IES).Results show that the vibration peaks of methylene and methyl representing aliphatic chain decrease with the increasing of temperature,and lateral chains are easily to subject to oxidation than main chains.Intensities of vibration peaks attributed to aromatic compounds vary respectively,some peaks such as 798,779 and 750cm-1 decrease with the increasing of temperature,but the reverse to other peaks.Vibration peaks such as 1 600 and 3 030cm-1 do not occur until 250℃ and increase first and decrease subsequently,while aromaticity factor increases progressively,showing a clear aromatization process.Also,carboxylic acids interact with interlayer hydrated actions of clay minerals through hydrogen bond,making carboxylic acids much stabile and thus suppressing their thermal evolution.IES study reveals that organic matter bound by clay minerals generates hydrocarbon mainly through aromatization of aliphatic compound,which is a quite useful method for source rocks thermal evolution study.

     

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