Volume 38 Issue 3
Sep.  2021
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2021  >  38(3): 356-359
YAO Ming, LIU Jingli, LU Sanjie, ZHONG Xinxin, LI Lei, YUAN Baoning, ZHANG Yuping. Study and Application of an Quick-Setting Cement Slurry in Cementing Shale Gas Wells in Changning, Sichuan[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(3): 356-359. doi: 10.3969/j.issn.1001-5620.2021.03.016
Citation: YAO Ming, LIU Jingli, LU Sanjie, ZHONG Xinxin, LI Lei, YUAN Baoning, ZHANG Yuping. Study and Application of an Quick-Setting Cement Slurry in Cementing Shale Gas Wells in Changning, Sichuan[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(3): 356-359. doi: 10.3969/j.issn.1001-5620.2021.03.016
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Study and Application of an Quick-Setting Cement Slurry in Cementing Shale Gas Wells in Changning, Sichuan

doi: 10.3969/j.issn.1001-5620.2021.03.016

  • 1. No. 1 Cementing Company, BHDC, Renqiu, Hebei 062552;

  • 2. Engneering Technology Research Institute, BHDC, Tianjin 300451;

  • 3. Xinqingyu Petraleum Engineering Division, BHDC, Tianjin 300451;

  • 4. Hebei Gas Storage Branch of PetroChina Huabei Oilfield Company, Langfang, Hebei 065000;

  • 5. PetroChina Huabei Oilfield Company, Renqiu, Hebei 062552

  • Received Date: 2021-01-10
    Abstract
  • Lost return of mud in the top-hole section of shale gas drilling in Sichuan Province were frequently encountered and were difficult to control and stop. A quick-setting cement slurry was developed to deal with this problem. The cement slurry was formulated with a liquid accelerating early strength additive ZQ-3 and a liquid colorless nontoxic dispersant ZF-A. The effect of the mixture of ZQ-3 and ZF-A in cement slurry at different concentrations was evaluated. It was found from the evaluation that the addition of the mixture into a cement slurry helped improve the rheology of the cement slurry. The thickening time was significantly shortened. At 30℃, the ratio of the thickening time of the mixture-treated (3%) cement slurry to the thickening time of the original cement slurry is 0.43. The early strength of the set cement was significantly increased by the treatment of the cement slurry with the mixture of ZQ-3 and ZF-A; the 4-hour compressive strength of the set cement is 3.5 MPa and the 8-hour compressive strength is 8.0 MPa. This quick-setting cement slurry was on 7 shale gas wells for 24 times in block Changning in Sichuan, the wait-on-cement time was reduced from 14 hours to 4-8 hours. All the cementing job was conducted smoothly and total hours of wait-on-cement was reduced by at least 200 hours.

     

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