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Synthesis and Characterization of Surfactant for Retarding Acid–Rock Reaction Rate in Acid Fracturing
- Source :
- Frontiers in Chemistry, Vol 9 (2021), Frontiers in Chemistry
- Publication Year :
- 2021
- Publisher :
- Frontiers Media SA, 2021.
-
Abstract
- Acid fracturing is an effective method to develop ultra-low permeability reservoirs. However, the fast reaction rate reduces the effect of the acid fracturing and increases the near-well collapse risk. Therefore, it is necessary to retard the acid–rock reaction rate. In this work, we synthesized an acid-resistant Gemini zwitterionic viscoelastic surfactant (named VES-c), which has good performances such as temperature resistance, salt resistance, and shear resistance. Besides, a low concentration of VES-c increases the viscosity of the acid solution. The CO2 drainage method was used to measure the reaction rate between the dibasic acid and dolomite/broken core. We find that the dibasic acid containing 0.3% VES-c retards the dolomite reaction rate of 3.22 times compared with only dibasic acid. Furthermore, the dibasic acid containing 0.3% VES-c exhibits uniform distribution and is not easy to adhere to the solid surface. The VES-c also is favorable to reduce the formation of amorphous calcium carbonate. Retarding the rate of acid–rock reaction and enhancing the acidification are mainly attributed to VES-c's salt-tolerance, anti-adsorption, and the property of increasing the viscosity of the solution. Hopefully, this kind of surfactant retarding reaction rate is applied to other acid–rock reactions.
- Subjects :
- Dibasic acid
Chemistry
surfactant
Dolomite
General Chemistry
retarding reaction rate
Viscoelasticity
Amorphous calcium carbonate
Reaction rate
chemistry.chemical_compound
Viscosity
retarding reaction mechanism
Chemical engineering
Pulmonary surfactant
Permeability (electromagnetism)
viscosity
acid fracturing
QD1-999
Original Research
Subjects
Details
- Language :
- English
- ISSN :
- 22962646
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Frontiers in Chemistry
- Accession number :
- edsair.doi.dedup.....fb737cb4271825770ef1c00b4eaf86ec
- Full Text :
- https://doi.org/10.3389/fchem.2021.715009