SPE Projects, Facilities & Construction
Volume 6, Number 3, September 2011, pp. 115-123

SPE-143704-PA

Field Application of Chelatants in the Handling of ASP-Flooding Produced Fluid

  • Jiecheng Cheng, PetroChina Daqing Oilfield Limited Company
  • Di Wu, PetroChina Daqing Oilfield Engineering Company, Limited
  • Wenjie Liu, PetroChina Daqing Oilfield Engineering Company, Limited
  • Xiangchun Meng, PetroChina Daqing Oilfield Engineering Company, Limited
  • Fuxiang Sun, PetroChina Daqing Oilfield Engineering Company, Limited
  • Fengling Zhao, PetroChina Daqing Oilfield Engineering Company, Limited
  • Qiushi Zhao, PetroChina Daqing Oilfield Engineering Company, Limited
  • Neng Jiang, PetroChina Daqing Oilfield Engineering Company, Limited

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DOI  More information 10.2118/143704-PA http://dx.doi.org/10.2118/143704-PA

Citation

  • Cheng, J., Wu, D., Liu, W. et al. 2011. Field Application of Chelatants in the Handling of ASP-Flooding Produced Fluid. SPE Proj Fac & Const  6 (3): 115-123. SPE-143704-PA. http://dx.doi.org/10.2118/143704-PA.

Discipline Categories

  • 5.5.3 Chemical Treatments
  • 6.4.6 Chemical Flooding Methods Methods (e.g., Polymer, Solvent, Nitrogen, Immiscible CO2, Surfactant, Vapex)
  • 5.5.2 Oilfield Water Analysis
  • 5.5.1 Asphaltenes, Hydrates, Precipitates, Scale, Waxes (Inhibition and Remediation)

Keywords

  • ASP flooding, produced water, suspended solid, scale, chelatant

Summary

Suspended-solid (SS) particles in the produced water of the X2M alkaline/surfactant/polymer (ASP) flooding project were separated by membrane filtration and identified to consist mainly of alkali-earth-metal carbonates and silica precipitates. A compound formulation of chelatants was developed to stabilize the water phase of ASP-flooding produced fluid and prevent or reduce precipitation of both alkali-earth-metal carbonates and silica. The compound chelatant was put into a limited field trial in the surface production system of the X2M ASP-flooding project to evaluate its effects on the quality of treated produced water. The average SS content of treated ASP-flooding produced water was decreased to below the 20-ppm SS specification limit for reinjection by a dosage of chelatant at 480 ppm or higher. Scale-removal performance of the compound chelatant was also observed during the field trial.

© 2011. Society of Petroleum Engineers

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History

  • Original manuscript received: 22 February 2010
  • Meeting paper published: 8 December 2009
  • Revised manuscript received: 14 October 2010
  • Manuscript approved: 28 October 2010
  • Published online: 27 July 2011
  • Version of record: 1 September 2011