effect of varying polyacrylamide molecular weight on tertiary

effect of varying polyacrylamide molecular weight on tertiary
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  • What is polyacrylamide (PAM)?
  • Polyacrylamide (PAM) is a synthetic polymer of long-chain acrylamide subunits, high molecular weight (1000 to 20 × 10 6 g/mol), and a wide range degree of hydrolysis (Abidin et al., 2012; Joshi & Abed, 2017 ).
  • How to select a polymer for enhanced oil recovery?
  • Typically, a polymer for enhanced oil recovery (EOR) is selected on the basis of the viscosity range or average molecular weight, concentration, and brine composition, besides other reservoir properties. There is not much emphasis given on how the elasticity of polymers could enhance the oil recovery.
  • Does the elasticity of polymers affect oil recovery?
  • The individual effect of the elasticity of polymers on oil recovery, breakthrough and overall recovery, and residual resistance factor (RRF) was determined by keeping the viscosity constant and varying the elasticity during secondary and tertiary recovery experiments.
  • What is the difference between secondary and tertiary recovery of elastic polymers?
  • Within two different groups of polymers each with similar average molecular weight studied here, nearly 10% higher recovery for the highest elastic polymer was observed during secondary recovery, whereas for tertiary flood ∼6% higher recovery with ∼5 times higher RRF value was observed for the highest elastic polymer solution studied here.