colloidal dispersion
1.PREPARATION OF CHROMIUM(Ⅲ) CROSSLINKED AM/AMPS COPOLYMER COLLOIDAL DISPERSION GEL FOR EOR
2.The characteristics of adsorption/retention of colloidal dispersion gel (CDG) in core-flooding is investigated in the paper.
3.This paper studied a CDG system (colloidal dispersion gels) of HPAM/ AlCit, based on formation characteristics and formation fluid characteristics of Daqing oilfield.
4.The flow property of the solution of colloidal dispersion gel(CDG) and hydrolytic polyacrylamide (HPAM) with different molecular weight in an unconsolidated sandpack and the influence of different size of the sand on the flow property of CDG in the sandpack are studied. Colloidal dispersion gels were made up of low concentrations of polymer ( HPAM ) and aluminum citrate in water.
5.Comparing with the polymer flooding,the technique of the colloidal dispersion gels (CDG) has the better properties of resisting the high salinity and temperature,also can adjust permeability contrast in deep reservoir. Its economic cost is low,so it is a very useful new method for enhanced crude oil recovery.
6.A cationic soap-free water-soluble polyacrylate colloidal dispersion was prepared through acidifying the copolymer solution which was produced by solution polymerization of acrylic monomers under different feeding manners and using iso-propanol as solvent, AIBN as initiator, dimethylaminoethyl methacrylate (DM) as functional comonomers.
7.The rheological properties of acrylic water solubilized colloidal dispersion, HDI oligomer and their crosslinking system were tested by the rotating viscometer. The relationships between shearing stress( τ ) and shearing rate( D ), apparant viscosity( η a) and shearing rate( D ), lg τ and lg D were studied. The values of n and K were calculated by the equation of Ostwald Dewaele.
8.A chromium(Ⅲ) colloidal dispersion gel(CDG) is prepared from an AM/AMPS copolymer with [η]=12.6 dL/g(25℃,in 0.5 mol/L NaCl aqueous solution) and other ingredients in highly mineralized produced water (TDS=9.5×10 4 ppm and [Ca 2+ ]+[Mg 2+ ]=2 700 ppm) for EOR in hostile reservoirs.
9.An HPAM/metal ion/phenolic resin colloidal dispersion gel(CDG) is outlined for its basic composion, formation conditions and performance properties; the features(injection pressure, volume, plug structure, and technologic aspects) of CDG flood design at well net J 145 of fault block MA 21, Hejian, central Hebei, are described and an analysis of the results of the pilot test on CDG flood at well net J 145 is given.
10.In view of the oil field operation area geological development characteristic and the convention colloidal dispersion gelatin insufficiency, this article has developed the hydrophobic association AP-P4 primary new agent CDG system, has evaluated the CDG performance by the transformed the pressure and the viscosity , has observed the CDG microscopic structure through the scanning electricity mirror, it is prove that the new CDG is the "true" dispersible gelatin.
