Potential use of Real-Time Dissolved Oxygen Sensors for Oxygen Scavenging Feedback Control

Research output: Contribution to journalConference article in JournalResearchpeer-review

Abstract

The North Sea oil and gas sector has been operational since the 1970's and the natural pressure in the reservoirs has been gradually decreasing, which has led to an increased use of water injection to facilitate the required pressure for oil and gas extraction. This involves high pressure and flow of sea water, which is transported through the offshore facilities and due to the corrosive environment, it introduces corrosion. One of the main culprits is dissolved oxygen, which the offshore operators actively remove with vacuum and chemical oxygen scavengers. The vacuum deaerators have a removal limit, after which the dissolved oxygen concentration is decreased using chemical oxygen scavengers most often sodium sulfite, but this adds a cost. The main expense is not the chemical itself, but the side product of the chemical reaction, which leaves sulfates, that feed sulfate reducing bacteria, leading to a production of Hydrogen sulfide which leads to sour corrosion. One solution to reduction in dissolved oxygen and oxygen scavenger is proper control of the facilities. This work investigates the potential for feedback control of the facilities using an online dissolved oxygen instrument, where an experimental study of three commercial dissolved oxygen instruments has been performed, with good results.
Original languageEnglish
JournalIOP Conference Series: Materials Science and Engineering
Volume504
Issue number1
Number of pages8
ISSN1757-8981
DOIs
Publication statusPublished - 2019
Event2018 International Workshop on Materials Science and Mechanical Engineering - Qingdao, China
Duration: 26 Oct 201828 Oct 2018
http://www.iwmsme.org/

Conference

Conference2018 International Workshop on Materials Science and Mechanical Engineering
CountryChina
CityQingdao
Period26/10/201828/10/2018
Internet address

Fingerprint

Dissolved oxygen sensors
Scavenging
Dissolved oxygen
Feedback control
Oxygen
Sulfates
Oils
Gases
Vacuum
Corrosion
Caustics
Hydrogen Sulfide
Water injection
Hydrogen sulfide
Chemical reactions
Bacteria
Sodium
Water
Costs

Cite this

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title = "Potential use of Real-Time Dissolved Oxygen Sensors for Oxygen Scavenging Feedback Control",
abstract = "The North Sea oil and gas sector has been operational since the 1970's and the natural pressure in the reservoirs has been gradually decreasing, which has led to an increased use of water injection to facilitate the required pressure for oil and gas extraction. This involves high pressure and flow of sea water, which is transported through the offshore facilities and due to the corrosive environment, it introduces corrosion. One of the main culprits is dissolved oxygen, which the offshore operators actively remove with vacuum and chemical oxygen scavengers. The vacuum deaerators have a removal limit, after which the dissolved oxygen concentration is decreased using chemical oxygen scavengers most often sodium sulfite, but this adds a cost. The main expense is not the chemical itself, but the side product of the chemical reaction, which leaves sulfates, that feed sulfate reducing bacteria, leading to a production of Hydrogen sulfide which leads to sour corrosion. One solution to reduction in dissolved oxygen and oxygen scavenger is proper control of the facilities. This work investigates the potential for feedback control of the facilities using an online dissolved oxygen instrument, where an experimental study of three commercial dissolved oxygen instruments has been performed, with good results.",
author = "L{\o}hndorf, {Petar Durdevic} and Zhenyu Yang",
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language = "English",
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journal = "IOP Conference Series: Materials Science and Engineering",
issn = "1757-8981",
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Potential use of Real-Time Dissolved Oxygen Sensors for Oxygen Scavenging Feedback Control. / Løhndorf, Petar Durdevic; Yang, Zhenyu.

In: IOP Conference Series: Materials Science and Engineering, Vol. 504, No. 1, 2019.

Research output: Contribution to journalConference article in JournalResearchpeer-review

TY - GEN

T1 - Potential use of Real-Time Dissolved Oxygen Sensors for Oxygen Scavenging Feedback Control

AU - Løhndorf, Petar Durdevic

AU - Yang, Zhenyu

PY - 2019

Y1 - 2019

N2 - The North Sea oil and gas sector has been operational since the 1970's and the natural pressure in the reservoirs has been gradually decreasing, which has led to an increased use of water injection to facilitate the required pressure for oil and gas extraction. This involves high pressure and flow of sea water, which is transported through the offshore facilities and due to the corrosive environment, it introduces corrosion. One of the main culprits is dissolved oxygen, which the offshore operators actively remove with vacuum and chemical oxygen scavengers. The vacuum deaerators have a removal limit, after which the dissolved oxygen concentration is decreased using chemical oxygen scavengers most often sodium sulfite, but this adds a cost. The main expense is not the chemical itself, but the side product of the chemical reaction, which leaves sulfates, that feed sulfate reducing bacteria, leading to a production of Hydrogen sulfide which leads to sour corrosion. One solution to reduction in dissolved oxygen and oxygen scavenger is proper control of the facilities. This work investigates the potential for feedback control of the facilities using an online dissolved oxygen instrument, where an experimental study of three commercial dissolved oxygen instruments has been performed, with good results.

AB - The North Sea oil and gas sector has been operational since the 1970's and the natural pressure in the reservoirs has been gradually decreasing, which has led to an increased use of water injection to facilitate the required pressure for oil and gas extraction. This involves high pressure and flow of sea water, which is transported through the offshore facilities and due to the corrosive environment, it introduces corrosion. One of the main culprits is dissolved oxygen, which the offshore operators actively remove with vacuum and chemical oxygen scavengers. The vacuum deaerators have a removal limit, after which the dissolved oxygen concentration is decreased using chemical oxygen scavengers most often sodium sulfite, but this adds a cost. The main expense is not the chemical itself, but the side product of the chemical reaction, which leaves sulfates, that feed sulfate reducing bacteria, leading to a production of Hydrogen sulfide which leads to sour corrosion. One solution to reduction in dissolved oxygen and oxygen scavenger is proper control of the facilities. This work investigates the potential for feedback control of the facilities using an online dissolved oxygen instrument, where an experimental study of three commercial dissolved oxygen instruments has been performed, with good results.

U2 - 10.1088/1757-899X/504/1/012098

DO - 10.1088/1757-899X/504/1/012098

M3 - Conference article in Journal

VL - 504

JO - IOP Conference Series: Materials Science and Engineering

JF - IOP Conference Series: Materials Science and Engineering

SN - 1757-8981

IS - 1

ER -