Compositional simulation evaluation of eor potential in shale oil reservoirs by cyclic natural gas injection

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

14 Scopus citations

Abstract

The depletion of petroleum hydrocarbons in the world has progressively increased during the past decades. To meet the increasing demand for energy resources, improving the oil recovery of unconventional reservoirs, such as shale oil has appealed great attention. The Eagle Ford shale reservoir is one of the most active U.S. Shale plays. An article by Hart (2011) quoted one of EOG resources recent reports that recovery factor for the Eagle Ford shale play during primary drive reservoir depletion will be roughly 5%. Other articles stated that the recovery factor of these reservoirs could be between 5 to 15 %. The vast oil remaining in shale reservoir stimulates our efforts to investigate the application of enhanced oil recovery methods. The main aid of this simulation study is to examine the feasibility of cyclic natural gas injection. Cyclic natural gas injection can be applied as substitution of cyclic Co2 injection with great advantages, such as lower corrosion levels and availability of the natural gas in some of shale oil plays such as Eagle ford shale reservoirs. In this paper, the effects of soaking period and injection pressure on oil recovery, among other parameters, were investigated. The compositional simulation study results show that cyclic natural gas injection is able to increase the recovery factor from 3 % to 5% depending on the operating conditions and number of cycles. In general, this study aided to develop a better understanding of the performance of cyclic natural gas injection in shale oil reservoirs.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE/AAPG/SEG Unconventional Resources Technology Conference
PublisherSociety of Petroleum Engineers
ISBN (Electronic)9781613993606
DOIs
StatePublished - 2016
EventSPE/AAPG/SEG Unconventional Resources Technology Conference - Denver, United States
Duration: Aug 25 2014Aug 27 2014

Publication series

NameSociety of Petroleum Engineers - SPE/AAPG/SEG Unconventional Resources Technology Conference

Conference

ConferenceSPE/AAPG/SEG Unconventional Resources Technology Conference
CountryUnited States
CityDenver
Period08/25/1408/27/14

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