Mobility Control and Enhanced Oil Recovery using
Mobility Control and Enhanced Oil Recovery using Partially Hydrolyzed Polyacrylamide (PHPA) Article (PDF Available) in International Journal of Oil Gas and Coal Technology 6(3) · January 2011
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Swelling ratio of PHPA gels as a function of log 1 (1 is the ionic strength) for different values of external pH pH Fig 4 Swelling force of PHPA gels at steady state as a function of external pH SWELLING PROPERTIES OF PARTIALLY HYDROLYZED POLYACRYLAMIDE AND GELATIN GELS 2 z o D 1s m 12 o o 08 z 04 w h 0 0 200 400 600 800 0 20 40 60 80 TIME (min
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SPE Drilling Engineering | SPE
Laboratory tests showed that the greatest improvement in shale inhibition was obtained, not from cationic polyacrylamide, but from a mixture of conventional PHPA and a cationic starch. [Cationic starch is prepared by reacting potato starch with either 2-dimethylaminoethyl chloride or n-(2,3-epoxypropyl)-trimethyl ammonium chloride.]
cited by: 1. 9264 1994 ANALYTICAL CHEMISTRY 66 12133 1997 REVISTA MEDICA DE CHILE 125(6):740-741 Valenzuela CY Ethical contribution from dolly. Investigation of spectral reproducibility in direct analysis of bacteria proteins by matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy.
Regional-scale subsurface sand remobilization: Geometry
Request PDF | Regional-scale subsurface sand remobilization: Geometry and architecture | An architectural hierarchy of elastic sills is recognized in the Panoche Giant Injection Complex in which
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Direct condensation refrigerant recovery and restoration system. SciTech Connect. Grant, D.C.H. 1992-03-10. This patent describes a refrigerant recovery and purification system for removing gaseous refrigerant from a disabled refrigeration unit, cleaning the refrigerant of contaminants, and converting the gaseous refrigerant to a liquid state
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- 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.
- What is an anionic polyacrylamide used for?
- There is a wide range of uses for anionic polyacrylamides and these include wastewater treatments aids, retention aids, and strength agents in papermaking, hydraulic stimulation, and enhanced oil recovery in oil field applications, mineral processing, and as soil conditioners in agricultural uses.
- What type of polyacrylamide is used in oil industry?
- 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. The anionic polyacrylamides in the oil field industry are designated by the generic name of partially hydrolyzed polyacrylamide (PHPA), although they are in actuality copolymers .
- Which comonomer is used for the production of anionic polyacrylamides?
- The workhorse comonomer for the production of anionic polyacrylamides is acrylate salts of acrylic acid. These anionic polymers can be prepared as various mono- and divalent metal salts and other positively charged inorganic and organic counterions of the polymerization of acrylic acid with acrylamide (see Fig. 34.4 ).
