Li Jianqing, Xia Zailian, Shi Haiying, Hua Caixia, Wang Xin. Characteristics of fluid inclusions and timing of hydrocarbon accumulation in Longtan reservoirs in Huangqiao region, Lower Yangtze Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(2): 195-198. doi: 10.11781/sysydz201302195
Citation: Li Jianqing, Xia Zailian, Shi Haiying, Hua Caixia, Wang Xin. Characteristics of fluid inclusions and timing of hydrocarbon accumulation in Longtan reservoirs in Huangqiao region, Lower Yangtze Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(2): 195-198. doi: 10.11781/sysydz201302195

Characteristics of fluid inclusions and timing of hydrocarbon accumulation in Longtan reservoirs in Huangqiao region, Lower Yangtze Basin

doi: 10.11781/sysydz201302195
  • Received Date: 2012-09-05
  • Rev Recd Date: 2013-02-25
  • Publish Date: 2013-03-28
  • In the Longtan Formation of the Upper Permian in Huangqiao region of the Lower Yangtze Basin, there are 2 stages of fluid inclusion. The fluid inclusions of stage Ⅰ mainly generated during the early-middle period of quartz overgrowth, and generally located along micro-fractures within a linear zone. The fluid inclusions of stage Ⅱ mainly generated after quartz overgrowth, and distributed along micro-fractures which cut through quartz overgrowth. The homogenization temperature of fluid inclusions was 75-120℃, and the peak was 75-85℃. Analyses of geothermal evolution, burial history and hydrocarbon generation-expulsion history revealed that the main hydrocarbon generation period of the Longtan Formation source rocks was in Cretaceous, and oil charging mainly occurred in Jurassic (188-160 Ma) and from the Late Cretaceous to Paleocene (60-43 Ma). The Longtan reservoir mainly formed at the end of Cretaceous.

     

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