Volume 34 Issue 5
Sep.  2017
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2017  >  34(5): 20-26
LI Jiaxue, ZHANG Shaojun, LI Lei, SUN Dongshan, ZHANG Chao, WANG Tao. Application of Environmentally Friendly High Performance Water Base Muds in Ultra Depp Well Drilling in Piedmont Area[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 20-26. doi: 10.3969/j.issn.1001-5620.2017.05.004
Citation: LI Jiaxue, ZHANG Shaojun, LI Lei, SUN Dongshan, ZHANG Chao, WANG Tao. Application of Environmentally Friendly High Performance Water Base Muds in Ultra Depp Well Drilling in Piedmont Area[J]. DRILLING FLUID & COMPLETION FLUID, 2017, 34(5): 20-26. doi: 10.3969/j.issn.1001-5620.2017.05.004
shu

Application of Environmentally Friendly High Performance Water Base Muds in Ultra Depp Well Drilling in Piedmont Area

doi: 10.3969/j.issn.1001-5620.2017.05.004

  • 1. Research Institute of Oil and Gas Engineering, PetroChina Tarim Oilfield Division, Korla, Xinjiang 841000;

  • 2. Department of Kuche Oil and Gas Development, PetroChina Tarim Oilfield Division, Korla, Xinjiang 841000;

  • 3. EntiPetrotech Corp, Beijing 100022

  • Received Date: 2017-07-18
  • Publish Date: 2017-09-30
    Abstract
  • High density water base drilling fluids have been used to drill ultra-deep, high temperature, ultra-high pressure wells penetrating salt formations in the piedmont structure in Kuche County, Xinjiang. Challenges encountered using conventional water base drilling fluids included difficulties in mud property maintenance, tight hole and pipe sticking. An environmentally friendly high performance water base drilling fluid formulated with borehole wall stabilizer, nano filming agent, high performance lubricant and specially designed fast drilling agent was tested in field operations. The high performance drilling fluid had high inhibitive capacity and good rheology and lubricity, and was environmentally friendly. It also helped protect reservoirs from being damaged. The application of this drilling fluid in a well drilled in the piedmont structure in Kuche has proved its performance as said above. Rate of penetration (ROP) of the well was 6.6% faster than the ROP of an offset well drilled with oil base drilling fluid. No drilling accidents have ever occurred, and occurrence of downhole complications was greatly reduced. This high performance low bio-toxicity water base drilling fluid has passed environment protection inspection. Drill cuttings produced were in their original colors, and were not colored by the drilling fluid. This environmentally friendly high performance drilling fluid has provided a means of drilling complex formations in environmentally sensitive area.

     

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