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- W4361771081 abstract "This paper studies the compressional-wave and shear-wave velocities in the laboratory in six conventional core plugs. These plugs were obtainedfrom a depth of more than 3000 m from the producing horizons of Naharkatiya oil reservoir of Upper Assam Basin, India. The porosities of theconventional core plugs were from 9.67 to 25.8% and that of unconsolidated sand pack was 47%. These plugs and sand pack were saturated withn-hexadecane before CO2 flooding. It was observed that during flooding compressional-wave velocities decreased more than the shear wavevelocities. These decreases in wave velocity depend on confining pressure, pore pressure, porosity and temperature of the plugs. Increasing porepressure at constant confining pressure not only keeps the pores and cracks open but also reduces the confining pressure effect and increases theCO2 density. Higher pore pressures causes larger decrease in both compressional and shear wave velocities. In case of conventional core plugswhich are consolidated, having lower porosities tends to decrease the CO2 effect. In unconsolidated sand pack the flooding effect is large eventhough porosity is high because the bulk modulus of the sand is low. The experimental and the theoretical analyses in this paper show that thedecrease in compressional-wave velocities caused by CO2 flooding makes it possible to track CO2 front movements and monitor CO2 floodingprocess in the reservoir." @default.
- W4361771081 created "2023-04-04" @default.
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- W4361771081 date "2017-03-12" @default.
- W4361771081 modified "2023-09-27" @default.
- W4361771081 title "A study of CO2 flooding on wave velocities in the Naharkatiya oil reservoir of Upper Assam Basin" @default.
- W4361771081 doi "https://doi.org/10.18799/24056529/2017/1/103" @default.
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