anionic polyacrylamide drilling fluids making process

anionic polyacrylamide drilling fluids making process
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  • How does polyacrylamide improve oil recovery?
  • The polymer added significantly increases the viscosity of the aqueous fluid, thus driving/sweeping the oil toward the producing well more efficiently than just water alone. CEOR can improve the recovery for a well as much as 60%–80%. Polyacrylamides are an important component of drilling fluids .
  • When was polyacrylamide first used in drilling mud?
  • Polyacrylamides were first introduced as an additive to drilling muds in the 1960s. The polyacrylamide use can be anionic, cationic, or nonionic with various ratios of the comonomers used in the case of the anionic and cationic polymers.
  • Can an anionic polymer withstand drilling fluid?
  • The fluid loss test on this drilling system found that anionic polymer can resist about 4.5 × 105 ppm of Cl −, 4 × 105 ppm of Ca 2+, and 1.5 × 104 ppm of Mg 2+ at low pH by adding the acidic gas together at 180 °C. Thus, it can withstand the temperature of drilling fluid up to 180 °C.
  • Why is anionic polyacrylamide chosen?
  • Anionic polyacrylamide is chosen because the intramolecular electrostatic repulsion between polymer segments forces the polymer chains to adopt a more extended conformation, increasing the efficiency of bridging flocculation.