Volume 32 Issue 1
Jan.  2015
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TENG Xueqing, ZHANG Jie, ZHU Jinzhi, WANG Shuangwei, ZHAO Zhiliang, ZHAO Ze. Permeability Impairment and Reservoir Protection for Tight Sand Gas Reservoir in Block Dina-3[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 18-21. doi: 10.3969/j.issn.1001-5620.2015.01.005
Citation: TENG Xueqing, ZHANG Jie, ZHU Jinzhi, WANG Shuangwei, ZHAO Zhiliang, ZHAO Ze. Permeability Impairment and Reservoir Protection for Tight Sand Gas Reservoir in Block Dina-3[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(1): 18-21. doi: 10.3969/j.issn.1001-5620.2015.01.005
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Permeability Impairment and Reservoir Protection for Tight Sand Gas Reservoir in Block Dina-3

doi: 10.3969/j.issn.1001-5620.2015.01.005

  • Research Institute of Oil and Gas Engineering, Tarim Oilfield Division, Korla, Xinjiang 841000, china

  • Received Date: 2014-12-22
  • Publish Date: 2015-01-30
    Abstract
  • The tight sands gas reservoir in Block Dina-3 is characteristic of low porosity, ultra-low permeability, clastic rock, low initial water saturation, severe inhomogeneity, developed fractures, and high clay content. The previously used potassium polymer sulfonate drilling fluid posed damage to the reservoir. By analyzing the mechanism of reservoir damage for the Block Dina-2 and the Block Dina-3, it was believed that the potassium polymer sulfonate drilling fluid caused water sensitivity, stress sensitivity, mud losses, capillary effect and phase trap damage to the reservoir. The potassium polymer sulfonate drilling fluid was modified with lost circulation material water block preventer that can be removed by acid treatment. The new drilling fluid had good rheology, low filter loss and excellent reservoir protection capacity.

     

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