Volume 39 Issue 3
May  2022
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WANG Chao, CUI Mingyue, ZHANG Xu, et al.Study on fracturing fluid formulated with ultra-high temperature retarded crosslinking polymers[J]. Drilling Fluid & Completion Fluid,2022, 39(3):390-396 doi: 10.12358/j.issn.1001-5620.2022.03.019
Citation: WANG Chao, CUI Mingyue, ZHANG Xu, et al.Study on fracturing fluid formulated with ultra-high temperature retarded crosslinking polymers[J]. Drilling Fluid & Completion Fluid,2022, 39(3):390-396 doi: 10.12358/j.issn.1001-5620.2022.03.019

Study on Fracturing Fluid Formulated with Ultra-High Temperature Retarded Crosslinking Polymers

doi: 10.12358/j.issn.1001-5620.2022.03.019
  • Received Date: 2022-01-05
  • Rev Recd Date: 2022-03-20
  • Publish Date: 2022-05-30
  • Plant gum thickening agents and their derivatives used in water based fracturing fluids have some shortages such as high residue content, poor thermal stability and easy spoilage. To solve these problems, a new thickening agent was developed with acrylamide (AM), a functional monomer SP and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) as the reaction monomers. In laboratory synthesis of this new thickening agent, based on the free radical polymerization of water-soluble polymer theory, the effects of the various synthesis conditions (such as concentration of the initiator, reaction temperature, pH of the reaction system, polymer concentration, content of the chain transfer agent and the degree of hydrolysis) on the performance of the final thickening agent were studied. Using the method of control variates, the reaction conditions are as follows: Polymer concentration = 25%, ratio of monomers (AMPS∶SP∶AM) = 30%∶25%∶45%, reaction temperature = 20 ℃, concentration of initiator = 0.3%, pH = 7, mass fraction of sodium formate = 0.2%, reaction time = 4 h. The thickening agent synthesized has good high temperature resistance, low water insoluble and high thickening capacity. It is instantly soluble and can be easily crosslinked with the organozirconium crosslinking agent. This thickening agent can be used in formation temperatures as high as 200 ℃.

     

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