Volume 37 Issue 1
Feb.  2020
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LI Weiping, ZHANG Xingzhou, ZHOU Mingming, XIANG Xingjin, JIANG Zhuo, HU Mojie. Study and Application of a Bactericide for Seawater Drilling Fluid Used in Directional Drilling in Bangladesh[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(1): 77-80. doi: 10.3969/j.issn.1001-5620.2020.01.012
Citation: LI Weiping, ZHANG Xingzhou, ZHOU Mingming, XIANG Xingjin, JIANG Zhuo, HU Mojie. Study and Application of a Bactericide for Seawater Drilling Fluid Used in Directional Drilling in Bangladesh[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(1): 77-80. doi: 10.3969/j.issn.1001-5620.2020.01.012
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Study and Application of a Bactericide for Seawater Drilling Fluid Used in Directional Drilling in Bangladesh

doi: 10.3969/j.issn.1001-5620.2020.01.012

  • 1. China University of Geosciences(Wuhan), Wuhan, Hubei 430074;

  • 2. The Fourth Branch of China Petroleum Pipeline Engineering Co., Ltd., Langfang, Hebei 065000;

  • 3. Research Institute of Oilfield Chemistry Industrial Technology of Hubei Province, Jingzhou, Hubei 434000

  • Received Date: 2019-11-15
  • Publish Date: 2020-02-28
    Abstract
  • Oil well drilling in the subtropic rain forest climate in Bangladesh is facing high temperature environment through the whole year. To prevent the negative effects of high temperature on the performance of drilling fluid, a compound bactericide HCA101 was selected to treat the seawater drilling fluid (seawater + 6% salt clay A1/B1/E1) for directional drilling. HCA101 is compatible very well with the drilling fluid; treatment of the drilling fluid with 0.5% HCA101 does not cause the mud to foam when agitating at high speeds. Time for the HCA101 treated mud to ferment is longer than 10 d, satisfying the needs of fermentation control in field application. HCA101 was first used in March of 2019 in a single-point mooring project in Bangladesh with good operational results; the mud properties were stable after successively 20 d of operation, no fermentation at high temperatures was found. This bactericide is worth spreading in operation with seawater drilling fluids in an environment that is similar to that in Bangladesh.

     

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