Volume 39 Issue 3
May  2022
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ZHOU Shanshan, ZHONG Chengbing, LIU Jie, et al.Application of ultra-low friction wwater-based ddrilling ffluid in shale gas horizontal wells[J]. Drilling Fluid & Completion Fluid,2022, 39(3):313-318 doi: 10.12358/j.issn.1001-5620.2022.03.008
Citation: ZHOU Shanshan, ZHONG Chengbing, LIU Jie, et al.Application of ultra-low friction wwater-based ddrilling ffluid in shale gas horizontal wells[J]. Drilling Fluid & Completion Fluid,2022, 39(3):313-318 doi: 10.12358/j.issn.1001-5620.2022.03.008

Application of Ultra-low Friction Wwater-based Ddrilling Ffluid in Shale Gas Horizontal Wells

doi: 10.12358/j.issn.1001-5620.2022.03.008
  • Received Date: 2021-12-29
  • Rev Recd Date: 2022-02-21
  • Available Online: 2022-08-10
  • Publish Date: 2022-05-30
  • Oil-based drilling fluid has excellent inhibition, blocking and lubrication properties, and it is currently the main type of drilling fluid for shale gas well operations. With the increasing pressure on environmental protection and waste mud disposal, shale gas drilling has put forward an urgent demand for water-based drilling fluid. Four horizontal wells are deployed in Fuling Jiao Shi, and the drilling target formation is Longmaxi Formation-Wufeng Formation. The target formation contains large sections of mud shale and fracture development, which is easy to hydrate and disperse, and has high risk of collapse and leakage. In response to the low friction requirement of the Fuling horizontal well and the vulnerability of the formation mud shale to well wall destabilization, an ultra-low friction water-based drilling fluid system was developed. The field application shows that the ultra-low friction water-based drilling fluid has achieved efficient and safe operation of the horizontal section of shale gas wells, with a 24.7% increase in mechanical drilling speed and a 6.2% reduction in drilling time per meter compared with oil-based drilling fluid in the same block. record. The successful application of this ultra-low friction water-based drilling fluid in Fuling shale gas is expected to realize the replacement of oil-based drilling fluid by water-based drilling fluid in shale gas.

     

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