A study on the dynamic interfacial tension of acidic crude oil/alkali (alkali-polymer) systems--

Journal Article · Sun Jan 01 00:00:00 EST 1989 · In Situ; (USA)

OSTI ID:7156329

Huang, Y; Yang, P; Qin, T ^[1]

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1. Research Institute of Petroleum Exploration and Development, Beijing (CN)

This paper describes the investigation of dynamic interfacial tension (DIFT) between the acidic Liao-He crude oil and two types of brine: a simple alkali system and a combined alkali-polymer system. It was found that interfacial tension (IFT) changed markedly with time and that the history of DIFT depended upon the concentration of alkali in the brine. The experimental results also showed that the IFT dropped dramatically as soon as the fresh oil contacted brine causing spontaneous emulsification to occur. The steady-state value of DIFT {gamma} st can be lower with the combined alkali-polymer system than with the simple alkali system. The results indicate that biopolymer is more effective than partially hydrolyzed polyacrylamide (PHPAM) for lowering {gamma} st and that Na{sub 2}Co{sub 1} causes a lower {gamma} st than NaOH in the combined alkali-polymer system. Optimized formulations containing Na{sub 2}CO{sub 3} added biopolymer can reduce {gamma} st by two orders of magnitude, and PHPAM can reduce {gamma} st by one order of magnitude. The interaction between alkali and polymer in the combined alkali-polymer system is discussed.

• OSTI ID: 7156329
• Journal Information: In Situ; (USA), Vol. 13:4; ISSN 0019-3267
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
DISPLACEMENT FLUIDS
OPTIMIZATION
OIL WELLS
PETROLEUM
ENHANCED RECOVERY
BRINES
CHEMICAL REACTION KINETICS
MICROEMULSION FLOODING
POLYMERS
VISCOSITY
WELL STIMULATION
ENERGY SOURCES
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
KINETICS
MISCIBLE-PHASE DISPLACEMENT
REACTION KINETICS
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production