There are three main types of oil recovery: - Primary recovers oil using reservoir pressure - Secondary uses water or gas injection to maintain pressure for additional oil recovery - Tertiary (Enhanced Oil Recovery/EOR) introduces fluids like polymers to increase recovery by reducing viscosity and improving flow. EOR techniques like polymer flooding can increase production significantly, such as from 10 to 50 barrels per day. EOR represents a large market and revenues are growing. Proper management is needed to control environmental impacts of EOR produced water.

2. • Primary Recovery — In Primary Recovery, oil isforced out by pressure
generated from gas present in the oil.
• Secondary Recovery — In Secondary Recovery, the reservoir is subjected to
water flooding or gas injection to maintain a pressure that continues to move
oil to the surface.
• Tertiary Recovery — Tertiary Recovery, also known as Enhanced Oil Recovery
(EOR), introduces fluids that reduce viscosity and improve flow.

3. Would increasing your oil production from 5 bbls/day to 10 bbls/day for
a 100% increase in oil production make a difference to company?
How about going from 10 bbls/day to 50 bbls/day for a 500% increase in
oil production.
That's a possibility with EOR technologies such as polymer flooding!

4. It’s a process for recovering mostly
every Barrels of Oil to get out all of
remaining oil in it.
And this is done by EOR technologies .

5. Mainly the following process are done for Enhanced oil
recovery
• Water injection
• Gas injection
• Reducing residual oil saturation, SOR (alcohol, polymers,
surfactants injection)
• Thermal: steam injection (to heating of the reservoir to lower
the viscosity)

7. • Improved oil recovery
• Increased "sweep efficiency"
• less water required when compared with typical water-flooding & steam injection
• Superior EOR technology with "heavy oil" formations/reservoirs with low viscosity
and where Steam Assisted Gravity Drainage (SAGD) is not suitable

8. Poly = many
mer = part
So, polymer, roughly defined, means "many parts."

9. Polyacrylamide powder or "PAM" is a non-toxic powder
that is a long-chain molecule first used in cleaning
wastewater at wastewater treatment plants. In polymer
flooding, PAM makes the water “Gel" greatly improving
the production of oil.

10. Oil and water are "immiscible" do not mix or blend with each other. This means that oil and
water can NOT displace the other within an oil reservoir.
In polymer flooding, a water-soluble polymer such as Polyacrylamide or "Pam" is added to the
water in the waterflood. This increases the viscosity of the water to that of a gel making
the oil and water greatly improving the efficiency of the waterflood.

16. The Enhanced Oil Recovery industry represents a $30 Trillion market,
(in the USA) with oil priced at $100 per barrel.
Enhanced Oil Recovery revenues nearly DOUBLED,
in just 4 years from $54.96 billion in 2007 to
$102.02 billion in 2011!
The United States will recover more than 300 Billion Barrels of Oil
through Enhanced Oil Recovery (EOR) technologies according to the
Department of Energy.
In the next 10-15 years, 50% of the oil produced in the USA will be through
Enhanced Oil Recovery technologies. And 50% of this amount will be produced
by CO2-EOR.

17. Enhanced oil recovery wells typically produce large
quantities of brine at the surface. The brine may contain
toxic metals and radioactive substances, as well as being
very salty. This can be very damaging to drinking water
sources and the environment generally if not properly
controlled.

18. http://www.polymerflooding.com/
http://en.wikipedia.org/wiki/Enhanced_oil_recovery#cite_note-Hobson-1
http://rockenergy.ca/Technologies/Tertiary-Recovery/index.php
http://www.azuren-eor.com/eor/chemical-eor/
http://en.wikiversity.org/wiki/Enhanced_oil_recovery