Proposing low temperature CO2 for enhancing miscibility in high temperature reservoirs

Zakaria Hamdi, Mariyamni Awang, Mahmood Bataee, Maryam Vatanparast

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

1 Citation (Scopus)

Abstract

For several decades, CO2 injection has been used as a successful recovery method in enhanced oil recovery. The main impact of CO2 is on lowering minimum miscibility pressure (MMP). Reaching the miscibility pressure is often limited by the reservoir pressure and temperature. Based on the earlier studies, lowering the temperature of the medium by the injection fluid may help in a decrease of MMP, resulting in miscible flooding. However, the proposed method should be determined by experimental procedures and numerical calculation. For the evaluation of MMP reduction and the limitations involved, the slimtube displacement experiments were used along with simulation runs. Then the results were compared with empirical correlations. The results showed that injection of low temperature CO2 (LCO2) has a direct impact on the MMP of a high temperature system. However, it limited when the injection temperature is below the critical temperature of CO2. A modification equation was presented to be applied on available empirical correlations. In terms of MMP, LCO2 injection is more beneficial than CO2 when it enters the reservoir at lower temperatures with respect to injection limitations.

Original languageEnglish
Title of host publicationSPE Reservoir Characterisation and Simulation Conference and Exhibition 2017
PublisherSociety of Petroleum Engineers
ISBN (Print)9781613995204
DOIs
Publication statusPublished - 2017
EventSPE Reservoir Characterisation and Simulation Conference and Exhibition 2017 - Abu Dhabi, United Arab Emirates
Duration: 8 May 201710 May 2017

Conference

ConferenceSPE Reservoir Characterisation and Simulation Conference and Exhibition 2017
Abbreviated titleRCSC 2017
CountryUnited Arab Emirates
CityAbu Dhabi
Period8/05/1710/05/17

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology

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