Volume 34 Issue 6
Nov.  2017
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ZHANG Lihua, YANG Peigao, JIN Hengtao, LI Jingtao, LI Haibiao, CHEN Jingyuan, ZHANG Wei, WANG Xiaona. Prevention and Control of Mud Losses in Reservoirs in Block Abu of Missan Oilfield (Iraq)[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 62-66. doi: 10.3969/j.issn.1001-5620.2017.06.012
Citation: ZHANG Lihua, YANG Peigao, JIN Hengtao, LI Jingtao, LI Haibiao, CHEN Jingyuan, ZHANG Wei, WANG Xiaona. Prevention and Control of Mud Losses in Reservoirs in Block Abu of Missan Oilfield (Iraq)[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(6): 62-66. doi: 10.3969/j.issn.1001-5620.2017.06.012
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Prevention and Control of Mud Losses in Reservoirs in Block Abu of Missan Oilfield (Iraq)

doi: 10.3969/j.issn.1001-5620.2017.06.012

  • 1. Research Institute of Engineering Technology of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552;

  • 2. The 2nd Drilling Branch of CNPC Bohai Drilling Engineering Company Limited, Langfang, Hebei 065000;

  • 3. Downhole Operation Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552;

  • 4. The 2nd Mud Logging Branch of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062552

  • Received Date: 2017-08-19
  • Publish Date: 2017-11-30
    Abstract
  • Carbonate reservoirs in the Block Abu, Missan Oilfield (Iraq) are full of fractures and vugs and are of low formation pressure. Mud losses have been the main problem encountered in drilling operations. Based on the summary of previous mud loss control techniques, an acid soluble compound lost circulation material (LCM) formulation was optimized under the help of logging data and electric imaging logging data. The acid dissolution rate of the optimized compound LCM was increased to above 75%. In laboratory simulation test, the pressure bearing capacity of the optimized compound LCM was increased to 7 MPa. Techniques of using the LCM were also optimized. This compound LCM was used on 5 wells in the Block Abu, and the success rate of mud loss control was evidently increased, further cutting down drilling time.

     

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