Lecture 14

Question 1

At a long studied oilfield near Medicine Hat what was the ultimate treatment they have found which works to prevent oil souring.

Answer 1

7- produced water weekly with alternating doses of nitrate of low (200ppm) to high (1000ppm)

Question 2

Define Corrosion
Define Corrosion in the context of the oil field

Answer 2

• An interaction between a material and its environment, resulting in the degradation of that material
• An electrochemical process between metal and its abiotic and biotic environment, resulting in it being oxidized.

Question 3

How much does it cost Canada’s energy transmission pipeline industry to monitor and maintain pipelines?

Answer 3

~ $2.9 Billion CAD/ year

Question 4

What is the main infrastructure of the oil and gas industry made of? (gathering pipelines, transmission lines, injection plants, storage tanks, refineries etc)

Answer 4

Carbon steel, a material which can be corroded.

Question 5

Arrange the pipeline types from smallest to largest in diameter.

Answer 5

• Distribution lines
• Gathering lines
• Feeder lines
• Transmission lines

Question 6

What does MIC stand for?

Answer 6

Microbiologically influenced corrosion. Not induced because it is very rare to find an example of corrosion solely due to microbiological activity.

Question 7

Give the anodic, cathodic, and overall reaction of iron corrosion.

Answer 7

pg 4

Question 8

What are the four essential elements required for corrosion/ an electrochemical cell?

Answer 8

• Anode
• Cathode
• Electrolyte
• Conductive (metallic) path

Question 9

When/ where do the Anodic and Cathodic reactions occur in relation to one another?

Answer 9

They occur simultaneously in the same location

pg 5

Question 10

1. What is the most well studied corrosion influencing microbe type?
2. What are other, less well studied types?

Answer 10

1. SRM

• NRM (oNRM/ soNRM)
• Iron- associated bacteria
• fermentative organisms/ syntrophs
• Acetogens
• Methanogens