Volume 35 Issue 6
Nov.  2018
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2018  >  35(6): 114-121
YU Fang, XU Kebin, ZHENG Lijun, FU Yueying, BAI Tianzeng, LI Yongjun, CAI Bo. Compounding Acid-Fracturing Techniques for Well AT3 in Yangshuiwu Deep Buried Hill Structure[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 114-121. doi: 10.3969/j.issn.1001-5620.2018.06.021
Citation: YU Fang, XU Kebin, ZHENG Lijun, FU Yueying, BAI Tianzeng, LI Yongjun, CAI Bo. Compounding Acid-Fracturing Techniques for Well AT3 in Yangshuiwu Deep Buried Hill Structure[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(6): 114-121. doi: 10.3969/j.issn.1001-5620.2018.06.021
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Compounding Acid-Fracturing Techniques for Well AT3 in Yangshuiwu Deep Buried Hill Structure

doi: 10.3969/j.issn.1001-5620.2018.06.021

  • 1. Downhole Services Company BHDC, Renqiu, Hebei 062552;

  • 2. Engineering Technology Research Institute, BHDC, Renqiu, Hebei 062552;

  • 3. Exploration Division of PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552;

  • 4. Langfang Branch of PetroChina Research Institute of Petroleum Exploration and Development, Langfang, Hebei 065007

  • Received Date: 2018-10-05
  • Publish Date: 2018-11-30
    Abstract
  • The Ordovician carbonate reservoir in the Yangshuiwu buried hill structure in Langgu sag is characteristic of deep burial, high temperature, compact lithology and high inhomogeneity etc., making it difficult to effectively stimulate the reservoir for high and stable production. Studies on "staged injection of acids for fracturing, temporary plugging with fiber (particles) for diverting and sand injection for acid-fracturing" have been conducted to address these problems. The studies gave birth to three choice stimulation fluids, which were "high temperature neutral crosslinking fracturing fluid, high temperature clean self-diverting acid and low-friction slick water", and a temporary plugging for diverting (spherical agent) technology. The well AT3, after applying these stimulation fluids and technology, produced 50×104 m3 gas and 35 ton oil daily, realizing the objectives of uniform acidizing, complex fracture network construction, communication of favorable pay zones located far apart and improvement of vertical producing degree and conductivity of artificial fractures, and satisfying the requirements of large-scale volumetric acid fracturing of similar reservoirs.

     

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