EVALUATION OF EDTA AS AN EOR AGENT IN CARBONATE ROCKS; INSIGHT INTO THE MECHANISMS

H. Soleimani; B. Shahsavani; M. Riazi

EVALUATION OF EDTA AS AN EOR AGENT IN CARBONATE ROCKS; INSIGHT INTO THE MECHANISMS

H. Soleimani
, B. Shahsavani
, M. Riazi

School of Mining and Geosciences

Shiraz University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The use of EOR techniques in oil fields is becoming more vital in 21th century as oil reservoirs are depleted and lots of hydrocarbons remains in the reservoirs. Chelating agents have shown the potential to be used as a chemical EOR and stimulation agent. In this work, the interaction of EDTA chelating agent in deionized water with dolostone slabs was assessed using contact angle measurements, Dissolution tests and IFT measurements. Results showed that EDTA solution at neutral pH was a strong wettability alteration agent. Dissolution tests revealed the fact that dissolution of calcium ions is the main mechanism for alteration of dolostone slabs wettability from oil wet toward strong water wet. IFT tests between crude oil and EDTA solution in deionized water showed a slight decrease of IFT with increasing concentration of EDTA. Rock dissolution, wettability alteration, and IFT reduction all happened at neutral pH which makes EDTA a promising EOR and stimulation agent with low risk in upstream oil industry.

Original language	English
Title of host publication	82nd EAGE Conference and Exhibition 2021
Pages	2367-2371
Number of pages	5
Volume	3
Publication status	Published - Jan 1 2021

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 9 Industry, Innovation, and Infrastructure
SDG 13 Climate Action
SDG 17 Partnerships for the Goals

Cite this

@inproceedings{2e95d659dd1c490b9f3c782b4e48bfe1,

title = "EVALUATION OF EDTA AS AN EOR AGENT IN CARBONATE ROCKS; INSIGHT INTO THE MECHANISMS",

abstract = "The use of EOR techniques in oil fields is becoming more vital in 21th century as oil reservoirs are depleted and lots of hydrocarbons remains in the reservoirs. Chelating agents have shown the potential to be used as a chemical EOR and stimulation agent. In this work, the interaction of EDTA chelating agent in deionized water with dolostone slabs was assessed using contact angle measurements, Dissolution tests and IFT measurements. Results showed that EDTA solution at neutral pH was a strong wettability alteration agent. Dissolution tests revealed the fact that dissolution of calcium ions is the main mechanism for alteration of dolostone slabs wettability from oil wet toward strong water wet. IFT tests between crude oil and EDTA solution in deionized water showed a slight decrease of IFT with increasing concentration of EDTA. Rock dissolution, wettability alteration, and IFT reduction all happened at neutral pH which makes EDTA a promising EOR and stimulation agent with low risk in upstream oil industry.",

author = "H. Soleimani and B. Shahsavani and M. Riazi",

year = "2021",

month = jan,

day = "1",

language = "English",

volume = "3",

pages = "2367--2371",

booktitle = "82nd EAGE Conference and Exhibition 2021",

}

TY - GEN

T1 - EVALUATION OF EDTA AS AN EOR AGENT IN CARBONATE ROCKS; INSIGHT INTO THE MECHANISMS

AU - Soleimani, H.

AU - Shahsavani, B.

AU - Riazi, M.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - The use of EOR techniques in oil fields is becoming more vital in 21th century as oil reservoirs are depleted and lots of hydrocarbons remains in the reservoirs. Chelating agents have shown the potential to be used as a chemical EOR and stimulation agent. In this work, the interaction of EDTA chelating agent in deionized water with dolostone slabs was assessed using contact angle measurements, Dissolution tests and IFT measurements. Results showed that EDTA solution at neutral pH was a strong wettability alteration agent. Dissolution tests revealed the fact that dissolution of calcium ions is the main mechanism for alteration of dolostone slabs wettability from oil wet toward strong water wet. IFT tests between crude oil and EDTA solution in deionized water showed a slight decrease of IFT with increasing concentration of EDTA. Rock dissolution, wettability alteration, and IFT reduction all happened at neutral pH which makes EDTA a promising EOR and stimulation agent with low risk in upstream oil industry.

AB - The use of EOR techniques in oil fields is becoming more vital in 21th century as oil reservoirs are depleted and lots of hydrocarbons remains in the reservoirs. Chelating agents have shown the potential to be used as a chemical EOR and stimulation agent. In this work, the interaction of EDTA chelating agent in deionized water with dolostone slabs was assessed using contact angle measurements, Dissolution tests and IFT measurements. Results showed that EDTA solution at neutral pH was a strong wettability alteration agent. Dissolution tests revealed the fact that dissolution of calcium ions is the main mechanism for alteration of dolostone slabs wettability from oil wet toward strong water wet. IFT tests between crude oil and EDTA solution in deionized water showed a slight decrease of IFT with increasing concentration of EDTA. Rock dissolution, wettability alteration, and IFT reduction all happened at neutral pH which makes EDTA a promising EOR and stimulation agent with low risk in upstream oil industry.

UR - https://www.scopus.com/pages/publications/85127742923

UR - https://www.scopus.com/pages/publications/85127742923#tab=citedBy

M3 - Conference contribution

AN - SCOPUS:85127742923

VL - 3

SP - 2367

EP - 2371

BT - 82nd EAGE Conference and Exhibition 2021

ER -

EVALUATION OF EDTA AS AN EOR AGENT IN CARBONATE ROCKS; INSIGHT INTO THE MECHANISMS

Abstract

UN SDGs

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