PetE 2204 – Lecture 01 - Defining EOR

8/17/2019 PetE 2204 – Lecture 01 - Defining EOR

1/19

PetE 2204 – 01/14/14

ENHANCED OIL RECOVERY PROCESSES

Lecture #1 Notes/Slides

What is Enhanced Oil Recovery (EOR)?

and

Why is it important?


2/19

PetE 2204 – 01/14/14EOR IS DEFINED AS:

“Techniques used to increase the amount of crude oil

extracted from an oil field.” http://en.wikipedia.org/wiki/Enhanced_oil_recovery

Early on, EOR was considered tertiary recovery, or thethird stage of oil recovery, because it was to beimplemented after primary recovery (normal

production) and secondary recovery (typically reservoirpressure maintenance, by water or gas injection).

http://en.wikipedia.org/wiki/Enhanced_oil_recoveryhttp://en.wikipedia.org/wiki/Enhanced_oil_recoveryhttp://en.wikipedia.org/wiki/Enhanced_oil_recovery


3/19

PetE 2204 – 01/14/14

Typical production profile for an oil well or oilfield.

Point A – Start of

primary production.

Point C – Futureeconomic limit under

primary recovery.

Point B – Start of

EOR process.

Point D - Future

economic limit under

EOR. Note that this is

higher due to the costs

of the EOR process.


4/19

PetE 2204 – 01/14/14Exception to EOR definition:

When produced water or produced gas is re-injected into the reservoir to maintain pressure.

This is most often referred to as:

Secondary Recovery


5/19

PetE 2204 – 01/14/14

Secondary Recovery will have a similar profile

Re-injection process


6/19

PetE 2204 – 01/14/14A BETTER DEFINITION FOR EOR:

“An oilrecovery enhancement method using

sophisticated techniques that alter theoriginal properties of the reservoir crude oil.”

http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=enhanced%20oil%20recovery

“Its purpose is not only to restore formation pressure, but also to improve oil displacement

or fluid flow in the reservoir.”

http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=enhanced%20oil%20recoveryhttp://www.glossary.oilfield.slb.com/en/Terms/f/formation.aspxhttp://www.glossary.oilfield.slb.com/en/Terms/p/pressure.aspxhttp://www.glossary.oilfield.slb.com/en/Terms/d/displacement.aspxhttp://www.glossary.oilfield.slb.com/en/Terms/d/displacement.aspxhttp://www.glossary.oilfield.slb.com/en/Terms/p/pressure.aspxhttp://www.glossary.oilfield.slb.com/en/Terms/f/formation.aspxhttp://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=enhanced%20oil%20recoveryhttp://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=enhanced%20oil%20recovery


7/19

PetE 2204 – 01/14/14Why EOR is important:

Only 10-20% of the Original Oil In Place can berecovered through the reservoir’s Primary Drive.

Secondary Recovery, where applicable, couldincrease the oil recovered by an additional 10-

20%.

Not employing EOR processes, leaves 60-80% ofthe oil behind in the reservoir.


8/19

PetE 2204 – 01/14/14Factors Important to Injection Operations:

When is the best time to employ injection?

Which fluid(s) could be used?

What will it/they cost?

How much oil could be recovered?

Where is the “optimum” objective?


9/19

PetE 2204 – 01/14/14

Three Major Categories of EOR Operations:

1. Chemical Flooding

- Alkaline, Surfactants, Polymers

2. Miscible/Immiscible Displacement

- Carbon Dioxide, WAG (Water Alternating

Gas)

3. Thermal

- Steam, In Situ Combustion


10/19

PetE 2204 –

01/14/14Water/Surfactant/Polymer Injection

Operations:


11/19

PetE 2204 – 01/14/14

Chemical EOR Processes:

From Enhanced Oil Recovery by Larry Lake


12/19

PetE 2204 – 01/14/14

Carbon Dioxide Miscible Injection Operations:


13/19

PetE 2204 – 01/14/14Miscible/Solvent EOR Processes:



14/19

PetE 2204 – 01/14/14

In Situ Combustion Operations:


15/19

PetE 2204 – 01/14/14

Cyclic Steam Stimulation Operations:


16/19

PetE 2204 – 01/14/14

Steam Flooding Operations:


17/19

PetE 2204 – 01/14/14Thermal EOR Processes:



18/19

PetE 2204 – 01/14/14

Data Required to Estimate Recovery fromInjection Operations:


19/19

PetE 2204 – 01/14/14

Data Required to Estimate Recovery fromInjection Operations (continued):

PetE 2204 – Lecture 01 - Defining EOR

Documents

Transcript of PetE 2204 – Lecture 01 - Defining EOR