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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2015  >  37(1): 22-27
Guo Hui, Ma Zhongyuan, Zhang Li, Huang Wei, Yang Suju. Development characteristics and hydrocarbon accumulation significance of fractures in Lower Silurian Kalpintag Formation, northern slope of central Tarim Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(1): 22-27. doi: 10.11781/sysydz201501022
Citation: Guo Hui, Ma Zhongyuan, Zhang Li, Huang Wei, Yang Suju. Development characteristics and hydrocarbon accumulation significance of fractures in Lower Silurian Kalpintag Formation, northern slope of central Tarim Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(1): 22-27. doi: 10.11781/sysydz201501022
shu

Development characteristics and hydrocarbon accumulation significance of fractures in Lower Silurian Kalpintag Formation, northern slope of central Tarim Basin

doi: 10.11781/sysydz201501022

  • Research Institute of Petroleum Exploration & Production, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

  • Received Date: 2013-09-05
  • Rev Recd Date: 2014-12-08
  • Publish Date: 2015-01-28
    Abstract
  • Based on the data of core, microscope thin section, scanning electron microscope, cathode lumine-scence, and conventional and dipole acoustic logging, the development characteristics and hydrocarbon accumulation significance of fractures in the Lower Silurian Kalpintag Formation on the northern slope of the central Tarim Basin were studied. A large number of mainly high-angle or vertical fractures developed in the study area. They feature low density, long length, medium width and low filling extent. More fractures were found in the relatively weak bands of rock, such as the margins and interlayers of boulder clays. Conventional logging curves showed two peaks and one order of magnitude difference. The anisotropy of fast shear wave in dipole acoustic logging showed that fracture development was influenced by NE trending strike-slip faults and the NE-SW trending maximum horizontal principal stress. The fractures in the Kalpintag Formation played important roles in the formation of tight sandstone reservoirs. They improved the porosity and permeability of tight sandstones, and the large-scale, high-angle or vertical fractures served as pathways for vertical migration of hydrocarbons. For the small-scale adjustment of hydrocarbon migration, the small-scale, low-angle or horizontal fractures were important.

     

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