Energies 2008, 1(1), 19-34; doi:10.3390/en1010019
Article

Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk

* email and
Received: 23 April 2008; in revised form: 30 May 2008 / Accepted: 2 June 2008 / Published: 6 July 2008
(This article belongs to the Special Issue Oil Recovery)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: It is customary, for convenience, to use relative permeability data produced at room temperature. This paper shows that this practice underestimates oil recovery rates and ultimate recovery from chalk rocks for high temperature reservoirs. Above a certain temperature (80°C in this work) a reduction of oil recovery was observed. The reduction in oil recovery is reflected by the shift of relative permeability data towards more oil-wet at high temperature (tested here 130°C). However, both IFT and contact angle measurements indicate an increase in water wetness as temperature increases, which contradict the results obtained by relative permeability experiments. This phenomenon may be explained based on the total interaction potential, which basically consists of van der Waals attractive and short-range Born repulsive and double layer electrostatic forces. The fluid/rock interactions is shown to be dominated by the repulsive forces above 80°C, hence increase fine detachment enhancing oil trapping. In other words the indicated oil wetness by relative permeability is misleading.
Keywords: Temperature; Relative Permeability; Oil Recovery; Wettability (Contact angle); Interfacial tension (IFT); Fluid/rock interaction
PDF Full-text Download PDF Full-Text [205 KB, uploaded 16 September 2008 11:01 CEST]

Export to BibTeX |
EndNote


MDPI and ACS Style

Hamouda, A.A.; Karoussi, O. Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk. Energies 2008, 1, 19-34.

AMA Style

Hamouda AA, Karoussi O. Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk. Energies. 2008; 1(1):19-34.

Chicago/Turabian Style

Hamouda, Aly A.; Karoussi, Omid. 2008. "Effect of Temperature, Wettability and Relative Permeability on Oil Recovery from Oil-wet Chalk." Energies 1, no. 1: 19-34.

Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert