Volume 40 Issue 6
Dec.  2023
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2023  >  40(6): 718-724
XIAO Jinyu, ZHOU Huaan, BAO Dan, et al.Optimization of sulfur-resistant drilling fluid techniques and its application in drilling high sulfur content reservoirs in northeast Sichuan[J]. Drilling Fluid & Completion Fluid，2023, 40（6）：718-724 doi: 10.12358/j.issn.1001-5620.2023.06.004
Citation: XIAO Jinyu, ZHOU Huaan, BAO Dan, et al.Optimization of sulfur-resistant drilling fluid techniques and its application in drilling high sulfur content reservoirs in northeast Sichuan[J]. Drilling Fluid & Completion Fluid，2023, 40（6）：718-724 doi: 10.12358/j.issn.1001-5620.2023.06.004
shu

Optimization of Sulfur-Resistant Drilling Fluid Techniques and Its Application in Drilling High Sulfur Content Reservoirs in Northeast Sichuan

doi: 10.12358/j.issn.1001-5620.2023.06.004
  • 1.

    Drilling Fluid Technology Service Company of Chuanqing Drilling Engineering Company, Chongqing 400021

  • 2.

    Drilling Fluid Technology Service Company of Chuanqing Drilling Engineering Company, Chendu, Sichuan 610056

  • 3.

    School of Chemistry and Chemical Engineering, Chongqing University of Science and Technology, Chongqing 401331

  • Received Date: 2023-05-14
  • Rev Recd Date: 2023-06-11
  • Publish Date: 2023-12-30
    Abstract
  • Reservoirs in the Tieshanpo formation, the Luojiazhai formation, the Dukouhe formation, the Qilixia formation, the Zhengba formation and the Feixianguan formation in the Pushadan gas field in northeastern Sichuan are those with high or extra-high sulfur content gas reservoirs. This paper discusses the optimization of sulfur-resistant drilling fluid techniques for the drilling of these high sulfur content reservoirs based on the analyses of the reservoir formation geology and of the difficulties in drilling fluid operation. A drilling fluid with sulfur resistance was formulated through laboratory experiment. Laboratory evaluation of the effects of mud viscosity, pH value, alkalinity and oil/water ratio on the absorption of H2S has shown that the optimized water-based drilling fluid and the oil-based drilling fluid have good sulfur resistance. The sulfur-resistant drilling fluid formulated has been very successfully used on the well Po-002-H4 and the well Luojia-24; the drilling time was greatly shortened, the rate of penetration obviously increased, the average hole enlargement reduced, and the drilling fluid showed good sulfur-resistance and sulfur-removal during drilling. This drilling fluid has satisfied the requirements of drilling wells with high sulfur content, and has broad development and application prospects in drilling the high sulfur content formations in the lower east Sichuan area.

     

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