Battle for the future of bitumen recovery
Battle for the future of bitumen recovery Methane or Propane? What is the future of bitumen recovery? Primary or thermal? SAGD or CSS? Inject methane, propane or surfactant?
Which of these will prove to be the most cost effective recovery tool for bitumen? Some operators are experimenting with each in the same field.
All these have been passed the theoretical phase and lab test phase. Each has been implemented in the field.
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Primary recovery
Some operators are falling back to primary recovery upon deciding that enhanced recovery isn't economic. For the right bitumen viscosity, some operators are able to produce oil without any injectant.
Progressive Cavity Pumps (PCP) are often used for primary recovery. Primary bitumen production usually produces 3-5% recovery, but some installations claim up to 12%.
Sometimes sand is produced with the bitumen. Using Cold Flow or Cold Heavy Oil Production with Sand (CHOPS) up to 50% of the production can be sand.
Just add steam
Steam, soak, suck it back. Cyclical Steam Stimulation (CSS) or "huff and puff" introduces steam into a bitumen reservoir as a stimulation treatment.
Recently many operators have been using horizontal wells in their CSS schemes.
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Steam Assisted Gravity Drainage
SAGD has become very popular. Rather than injecting and producing from the same well bore as in CSS, a horizontal injector is placed very near a horizontal producer.
Steam injected melts the bitumen which is produced by the producing well.
Steam Additive - Methane
In addition to steam, some operators are adding methane. Since methane doesn't condense at reservoir conditions, it helps maintain injection volume introduced by the steam. Steam rate can be reduced and production still stays high.
Methane injection can reduce the cost of steam injection, one of the largest operating costs of SAGD.
Methane injection has become very popular with SAGD operators, but very few CSS operators are trying it.
Steam and Propane co-injection
One operator is a proponent for injecting propane into his thermal operation. On top of saving steam generation costs, water processing and disposal costs, he believes he will generate 25% more bitumen recovery.
And later, you can produce all your propane back for resale.
The propane injected absorbs into the bitumen and reduces viscosity. Additional recovery is the result.
You can get his application documents by clicking the below. You can get them in moments -- self serve. For less than $100.
Buy these submission docs now Subscribers get them for freeAdding surfactant
Some operators are injecting surfactant into their thermal schemes. Some hope to heal hot spots that short-circuit injector and producer paths.
Other operators hope for additional recovery using surfactant.
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Granger Low 18 Oct 2016

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