Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs

S. Ayatollahi, F. Boukadi, M. Wadhahi, R. Maamari, A. Bemani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Citations (Scopus)

Abstract

In Oman, it is known that the oil content in matrix porosity in fractured carbonate oil reservoirs exceeds more than 90% of the oil originally in place. Minimal recovery factors during the primary stages of production are due to the nature of these carbonate reservoirs; geometry and extent of the fracture network, matrix permeability, wettability tendency, as well as the nature of the fluid system. The occurrence of a strong water drive, in some of the fields, becomes even more detrimental to primary recovery. The Omani oilfield of Qam Alam, with a naturally-fractured Shuaiba carbonate reservoir, is at the center of this investigation. Its reservoir contains 213 million cubic meters of heavy crude (16° API and 220 cp) with an expected ultimate oil recovery of 2% of STOIIP, under primary depletion. Intensive theoretical and experimental studies are carried out in an attempt to quantify potential gains from the Gas-oil Gravity Drainage (GOGD) mechanism that is taking place in the reservoir. Investigations will be undertaken to validate the theory that the combined effects of matrix accessibility to the trapped oil by hot gas, oil viscosity reduction, and the possible oil bank formation are contributing to a higher oil recovery factor during GOGD.

Original languageEnglish
Title of host publicationSPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings
Pages1119-1124
Number of pages6
Publication statusPublished - 2005
Event14th SPE Middle East Oil and Gas Show and Conference: Meeting the Global Demand Challenge, MEOS 2005 - , Bahrain
Duration: Mar 12 2005Mar 15 2005

Other

Other14th SPE Middle East Oil and Gas Show and Conference: Meeting the Global Demand Challenge, MEOS 2005
CountryBahrain
Period3/12/053/15/05

Fingerprint

Gas oils
Drainage
Carbonates
Gravitation
Recovery
Oils
Hot Temperature
Application programming interfaces (API)
Wetting
Porosity
Viscosity
Fluids
Geometry
Water

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Ayatollahi, S., Boukadi, F., Wadhahi, M., Maamari, R., & Bemani, A. (2005). Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs. In SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings (pp. 1119-1124). [SPE 93585]

Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs. / Ayatollahi, S.; Boukadi, F.; Wadhahi, M.; Maamari, R.; Bemani, A.

SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings. 2005. p. 1119-1124 SPE 93585.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ayatollahi, S, Boukadi, F, Wadhahi, M, Maamari, R & Bemani, A 2005, Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs. in SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings., SPE 93585, pp. 1119-1124, 14th SPE Middle East Oil and Gas Show and Conference: Meeting the Global Demand Challenge, MEOS 2005, Bahrain, 3/12/05.
Ayatollahi S, Boukadi F, Wadhahi M, Maamari R, Bemani A. Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs. In SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings. 2005. p. 1119-1124. SPE 93585
Ayatollahi, S. ; Boukadi, F. ; Wadhahi, M. ; Maamari, R. ; Bemani, A. / Investigation of thermal Gas-Oil Gravity Drainage (GOGD) in fractured carbonate reservoirs. SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings. 2005. pp. 1119-1124
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