A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media

Samaneh Soroush, Peyman Pourafshary, Mohsen Vafaie-Sefti

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

7 Citations (Scopus)

Abstract

Carbon dioxide injection is used for tertiary oil recovery and can recover significant amount of residual oil. CO2 injection has been used successfully as an enhanced oil recovery (EOR) method for several decades. Recently, CO2 flooding method has gained popularity due to the growing concerns over the global warming issue. Hence, many light and medium reservoirs are subjected to Immiscible, miscible, and near-miscible CO 2 flooding. In CO2 or hydrocarbon flooding, the asphaltene to resin ratio of crude oil is altered, causing asphaltene precipitation and thereby its deposition. The deposition of asphaltene in an oil reservoir during production causes formation damage and productivity decline. The severity of this damage is different during miscible and immiscible flooding. In this study, asphaltene deposition due to miscible and immiscible carbon dioxide flooding and its effect on porous media damage are experimentally investigated. A high-pressure, high-temperature coreflood set-up is designed to work under reservoir conditions up to 6000 psia and 150 °C. Dynamic displacement experiments were carried out to study the process of asphaltene deposition and permeability reduction during CO2 injection in core samples. For this purpose, the pressures along the core were measured at 4 different points to study the damage distribution. Damage index were measured in different sections and compared during miscible and immiscible flooding and the effect of residual gas saturation in permeability reduction is studied as well. The results showed that two parameters could change the permeability of the medium. At pressure lower than MMP trapped gas in the pores may also reduce the permeability and at pressure above the MMP asphaltene deposition is the main factor for the porosity and permeability reduction. The maximum damage index occurs in miscible flooding which was equal to 0.79.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014
Subtitle of host publicationDriving Integrated and Innovative EOR
PublisherSociety of Petroleum Engineers
Pages25-34
Number of pages10
ISBN (Print)9781632663184
Publication statusPublished - Jan 1 2014
Externally publishedYes
EventSPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR - Muscat, Oman
Duration: Mar 31 2014Apr 2 2014

Conference

ConferenceSPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR
CountryOman
CityMuscat
Period3/31/144/2/14

Fingerprint

asphaltene
Porous materials
porous medium
Carbon dioxide
flooding
carbon dioxide
damage
permeability
Recovery
Core samples
oil
Global warming
Gases
recovery method
enhanced oil recovery
Resins
Crude oil
Porosity
Productivity
Hydrocarbons

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Soroush, S., Pourafshary, P., & Vafaie-Sefti, M. (2014). A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media. In Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR (pp. 25-34). Society of Petroleum Engineers.

A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media. / Soroush, Samaneh; Pourafshary, Peyman; Vafaie-Sefti, Mohsen.

Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR. Society of Petroleum Engineers, 2014. p. 25-34.

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

Soroush, S, Pourafshary, P & Vafaie-Sefti, M 2014, A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media. in Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR. Society of Petroleum Engineers, pp. 25-34, SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR, Muscat, Oman, 3/31/14.
Soroush S, Pourafshary P, Vafaie-Sefti M. A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media. In Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR. Society of Petroleum Engineers. 2014. p. 25-34
Soroush, Samaneh ; Pourafshary, Peyman ; Vafaie-Sefti, Mohsen. / A comparison of asphaltene deposition in miscible and immiscible carbon dioxide flooding in porous media. Society of Petroleum Engineers - SPE EOR Conference at Oil and Gas West Asia 2014: Driving Integrated and Innovative EOR. Society of Petroleum Engineers, 2014. pp. 25-34
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