Chemical Enhanced Oil Recovery and the Dilemma of More and Cleaner Energy

Rouhi Farajzadeh, Ali Akbar Eftekhari, Siavash Kahrobaei, Rifaat Mjeni, Diederik Boersma, Hans Bruining

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

We develop a method based on concept of exergy-return on exergy-investment (ERoEI) to determine the energy efficiency and CO2 footprint of polymer and surfactant enhanced oil recovery (EOR). This integrated approach considers main surface and subsurface elements of the chemical EOR methods. The main energy investment in oil recovery by water injection is mainly related to circulation of water with respect to exergy of the oil produced. At large water cuts of >90%, more than 70% of the total invested energy is spent on pumping the fluids. Consequently, production of barrels of oil is associated with large amounts of CO2 emission for mature oil fields with large water cuts. Our analysis shows that injection of polymer increases the energy efficiency of the oil recovery system. Because of additional oil (exergy gain) and less water circulation (exergy investment), the project-time averaged energy invested (and consequently CO2 emitted) to produce one barrel of oil from polymer flooding is less than that of the water flooding at large water cuts. We conclude that polymer injection into reservoirs with high water cut can be a solution for two major challenges of the transition period: (1) meet the global energy demand via an increase in oil recovery and (2) reduce the CO2 footprint of oil production (more and cleaner oil). For surfactant-polymer EOR, the extent of improvement in energy efficiency depends on the incremental gain and the simplicity of the formulations.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE Conference at Oman Petroleum and Energy Show, OPES 2022
PublisherSociety of Petroleum Engineers
Number of pages16
ISBN (Electronic)978-1-61399-706-2
DOIs
Publication statusPublished - 2022
Event2022 SPE Conference at Oman Petroleum and Energy Show, OPES 2022 - Muscat, Oman
Duration: 21 Mar 202223 Mar 2022

Publication series

NameSociety of Petroleum Engineers - SPE Conference at Oman Petroleum and Energy Show, OPES 2022

Conference

Conference2022 SPE Conference at Oman Petroleum and Energy Show, OPES 2022
Country/TerritoryOman
CityMuscat
Period21/03/2223/03/22

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