Volume 39 Issue 6
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HE Yingzhuang, BU Yuhuan, LIU Huajie.Research and field test of self-healing cement slurry for gas[J]. Drilling Fluid & Completion Fluid，2022, 39（6）：743-747 doi: 10.12358/j.issn.1001-5620.2022.06.012
Citation: HE Yingzhuang, BU Yuhuan, LIU Huajie.Research and field test of self-healing cement slurry for gas[J]. Drilling Fluid & Completion Fluid，2022, 39（6）：743-747 doi: 10.12358/j.issn.1001-5620.2022.06.012
shu

Research and Field Test of Self-Healing Cement Slurry for Gas

doi: 10.12358/j.issn.1001-5620.2022.06.012
  • 1.

    School of Petroleum Engineering in China University of Petroleum(East China), Qingdao, Shandong 266580

  • 2.

    Petroleum Engineering Technology Research Institute, Northwest Oilfield Company, Sinopec, Urumqi, Xinjiang 830011

  • 3.

    Key Laboratory of Enhanced Recovery for Fracture-cave Oil Reservoir, Sinopec, Urumqi, Xinjiang 830011

  • Received Date: 2022-05-20
  • Rev Recd Date: 2022-06-23
  • Publish Date: 2022-11-30
    Abstract
  • The micro crack and micro annular gap are inevitable during the production of condensate gas reservoir in Shunbei oil & gas field, but the existing self-healing agent has low temperature resistance, and the evaluation method of self-healing ability is very different from the downhole working conditions. So it can not be applied to Shunbei oil & gas field. A self-healing emulsion in gas suitable for Shunbei oil & gas field is developed, with the volume expansion rate in gas reaches 30%. This agent can prepare self-healing cement slurry with density range of 1.45-2.20 g/cm3, which is suitable for 90-180 ℃, with low modulus of elasticity <7 GPa. At the same time, a reasonable evaluation method for the self-healing ability of cement in gas is devised. Through the first and second artificial fractures making, the self-healing ability of cement paste is 100% and 95.1% respectively. At present, the self-healing cement slurry for gas has been tested in 3 wells, and the high quality rate of cementing quality is 100%, which meets the needs of long-term sealing of HTHP gas wells in Shunbei oil & gas field.

     

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