Open AccessImproved efficiency of miscible CO{sub 2} floods and enhanced prospects for CO{sub 2} flooding heterogeneous reservoirs. Quarterly technical progress report, October 1--December 31, 1996
Author(s) -
Reid B. Grigg,
David S. Schechter,
Shih-Hsien Chang,
Boyun Guo,
JyunSyung Tsau,
Jerry F. Casteel
Publication year - 1997
Language(s) - English
Resource type - Reports
DOI - 10.2172/453450
Subject(s) - pulmonary surfactant , surface tension , porous medium , capillary action , saturation (graph theory) , materials science , durability , porosity , chemical engineering , petroleum engineering , permeability (electromagnetism) , capillary pressure , hydrocarbon , environmental science , composite material , chemistry , geology , thermodynamics , engineering , mathematics , organic chemistry , biochemistry , physics , combinatorics , membrane
Progress has been made in each of the three project areas during this quarter. Each quarter the authors highlight one project area. This quarter, Task 1 is being highlighted with expanded details. In Task 1, a foam-durability apparatus was used to evaluate surfactant and foam properties (interfacial tension (IFT) of surfactant solution with dense CO{sub 2}, the critical micelle concentration, foaming ability of the mixture and foam stability) at high pressure condition. These data were correlated with the dynamic properties of foam measured in coreflooding experiments. For the five surfactants tested the results show that effectiveness of mobility reduction of foam in porous media is strongly correlated with the stability of foam in the bulk phase and the mobility reduction factor increases with the reduction of IFT. During this quarter in Task 2 a new series of core flood tests was completed, that measured the effects of CO{sub 2} flow fraction and rock permeability on foam-flow behavior. Also, an apparatus was designed, built, and tested under reservoir conditions that measures volume and composition of CO{sub 2} hydrocarbon extractable components. In Task 3 this quarter, a core was prepared to aid in the determination of the effect of water saturation on the efficiency of CO{sub 2} gravity drainage