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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2015  >  37(6): 696-703
Lin Tong, Ran Qigui, Wei Hongxing, Sun Xiongwei, Wang Rong. Pore-throat characteristics of tight sandstones and its influence on reservoirs in Dibei area of the Kuqa Depression[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(6): 696-703. doi: 10.11781/sysydz201506696
Citation: Lin Tong, Ran Qigui, Wei Hongxing, Sun Xiongwei, Wang Rong. Pore-throat characteristics of tight sandstones and its influence on reservoirs in Dibei area of the Kuqa Depression[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(6): 696-703. doi: 10.11781/sysydz201506696
shu

Pore-throat characteristics of tight sandstones and its influence on reservoirs in Dibei area of the Kuqa Depression

doi: 10.11781/sysydz201506696
  • 1.

    Sinochem Petroleum E & P Co Ltd, Beijing 100031, China

  • 2. Research Institute of Petroleum Exploration and Development-Langfang, PetroChina, Langfang, Hebei 065007, China

  • 3. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Kuerle, Xinjiang 834000, China

  • Received Date: 2014-10-31
  • Rev Recd Date: 2015-09-18
  • Publish Date: 2015-11-28
    Abstract
  • The pore-throat characteristics of tight sandstones from Dibei area of the Kuqa Depression were studied using cast thin section, scanning electron microscope, laser scanning confocal microscope and micro/nano CT analyses. A large amount of long, narrow and flat pore-throats were observed. Micro/nano throats and intercrystal pores in clay minerals are the most common in reservoirs. According to nitrogen adsorption, constant velocity mercury injection, and physical property analyses under overburden pressure, the throat radius ranges from 1 to 4μm, accounting for about 2/3 of the total reservoir space. The fluid flow in tight reservoirs is directly influenced by throat radius and pore/throat ratio. Clay minerals in pore-throats control fluid mobility.

     

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