Volume 42 Issue 1
Feb.  2025
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LIU Huaizhu, ZHAO Kangning, CHEN Dong, et al.Recycling in drilling fluids of flowback fluids from slick water fracturing operation[J]. Drilling Fluid & Completion Fluid，2025, 42（1）：127-133 doi: 10.12358/j.issn.1001-5620.2025.01.014
Citation: LIU Huaizhu, ZHAO Kangning, CHEN Dong, et al.Recycling in drilling fluids of flowback fluids from slick water fracturing operation[J]. Drilling Fluid & Completion Fluid，2025, 42（1）：127-133 doi: 10.12358/j.issn.1001-5620.2025.01.014
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Recycling in Drilling Fluids of Flowback Fluids from Slick Water Fracturing Operation

doi: 10.12358/j.issn.1001-5620.2025.01.014
  • 1.

    Xi'an Shiyou University, College of Petroleum Engineering, Xi'an, Shaanxi 710065

  • 2.

    Tangshan Jiyou Ruifeng Chemical Co., Ltd., Jidong Oilfield, Petrochina, Tangshan, Hebei 063505

  • 3.

    Western Exploration and Development Project Department of Jidong Oilfield, Yulin, Shaanxi 719000

  • 4.

    CNPC Chuanqing Drilling Engineering Co., Ltd., Xi'an, Shaanxi 710018

  • 5.

    Xi'an Shiyou University, College of Chemistry and Chemical Engineering, Xi'an, Shaanxi 710065

  • Received Date: 2024-08-02
  • Rev Recd Date: 2024-09-20
  • Publish Date: 2025-02-01
    Abstract
  • When using slickwater fracturing fluids in reservoir stimulation, large amount of fluids flowed back from the hole have complex compositions and need to be discharged. In disposing these fluids, the “zero discharge” technology does not work. To solve this problem, the techniques for the treatment of the flowback slickwater fracturing fluid are optimized to retain the effective components to the maximum, and the slickwater fracturing fluid after treatment is then used as a component of drilling fluids, thereby realizing the recycling of the water phase and part of the additives in the flowback fracturing fluid. An environmentally friendly low-friction drilling fluid is formulated with flowback slickwater fracturing fluids, the composition of which is as follows: make-up water+4%sodium bentonite+0.3%soda ash + 3%polysaccharide+0.1%FA-367+1.0%CMC-LV+1.0%methyl oleate. Laboratory experiment results show that the properties of this drilling fluid are stable at temperatures between 25℃ and 150℃, the percent shale core recovery on hot rolling test is at least 90%, the linear rate of expansion of shale cores is reduced by at least 72%, the friction coefficient is reduced by at least 80%, and the drilling fluid satisfies the requirements of environment protection. The micromorphology of the mud cakes under SEM proves that this drilling fluid has good shale inhibitive capacity and good filtration control property at elevated temperatures.

     

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