26 status of low power gas well pump development in north ... · microsoft powerpoint - 26 status...
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Status of Low Power Gas Well Pump Development in North America
Bryan Dotson, BP America, Houston
2nd European Conference on Gas Well Deliquification
24-26 September 2007, Hampshire Hotel, Groningen, The Netherlands
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2nd European Conference on Gas Well Deliquification
So, a year later..where are we?
• Solar/Fiberglass Rod Pumping “At-Scale” Project
• US Market potential for the deep pump scoped out
• Suppliers working on hydraulic and electric pump concepts
• Small steps toward low cost power
What do we need to do?
• Better estimate of potential gas production gains
• Continue prototype testing
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2nd European Conference on Gas Well Deliquification
Low Power Physics & Economics
Today
20 kW Minimum
$150,000 install
$6000/month opex
Tomorrow
2 kW
$75,000 install
$3000/month opex
Fun Fact: Fundamentally, it takes ¾ HP to move 10 BPD from 10,000’
(1 kW for 1.6 m3 from 3000 m)
Can 1/10 the powerlead to ½ the cost?
Can 1/10 the powerlead to ½ the cost?
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2nd European Conference on Gas Well Deliquification
Example: Solar/Fiberglass Project
• Installing 15 in 2007 to move from pilot to “At-Scale”.
• Reduces operating expense, lowering economic limit and increasing reserves.
• Very economic when tied to a repair.
10 BPD, 1800’ (1.6 m3, 550m)
Intangibles:
• 25 ton/yr/well GHG reduction.
• Quieter than engine.
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2nd European Conference on Gas Well Deliquification
Example: Solar/Fiberglass Project
Case 1: No ChangeEconomic Limit reached in 2010
(~27 mcf/dor 750 m3/day)
Case 2: Solar Pump JackEconomic Limit reached in 2019
(~5 mcf/d or 140 m3/day)
Adds 44 MMSCF (1.2 E6 m3)
Reduced operating expense improves
profitability
Unit Installed
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2nd European Conference on Gas Well Deliquification
US Market Study for Deep Gas Wells
• 63,000 gas wells 5000’ to 13000’, mostly 4-1/2” casing with 2-3/8” tubing, primarily in Texas and Rocky Mountains. Of these, 51,000 need less than 1 hydraulic HP.
• Assuming $4/MMBTU, 50% production gain, 1 year payout, and only wells producing second half of 2005:
1.2
0.3
BCF/d
34E618,000$60,000
8E64000$120,000
m3/dayEconomic WellsInstall Cost
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2nd European Conference on Gas Well Deliquification
Mechanical Power Transmission
• CDI Solar/Fiberglass: Have developed install capability in NW New Mexico.
• Fiberod has installed several high efficiency beam pumps to take advantage of threaded fiberglass sucker rod.
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2nd European Conference on Gas Well Deliquification
Hydraulic Power Transmission
• Smith Lift HDI (downhole switching valve)
– Extended run at RMOTC.
– Conoco-Phillips has installed in 3800’, 13 BPD coal degas well. (1100m, 2m3/d liquids)
– BP will install at about 7000’ (2100 m) in East Texas October 2007.
• Surface-switched hydraulic pumps are offered by a number of suppliers. A combination of testing and theory indicates that such pumps can be successful shallow but won’t be competitive below 5000’ (1500m).
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2nd European Conference on Gas Well Deliquification
Electric Power Transmission
• XL Technology Ltd.
– Developing 1.68” OD insert positive displacement pump.
– Envision US installations in first half of 2008.
• Ziebel AS
– MagLev proposal at ITF.
– Possible 2008 installation in North Sea.
• Impact Technologies LLC
– $250,000 funding from Stripper Well Consortium to develop electric plunger pump.
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2nd European Conference on Gas Well Deliquification
Power Source Option: Cost, Green
Solar:
• Successful trial in Farmington ¼ HP (~0.2 kW).
• Probably not good at 1-2 HP (0.75-1.5 kW).
• Visual Impact!
Wind:
• Problem is mast height and visual.
• Tethered is possible but concerns are maintenance and visual impact.
Generators:
• Good because we always have gas; bad due to maintenance and emissions.
• Smallest commercial internal combustion is Arrow K-6 (~3 kW)
• Stirling cycle is commercial (Whispergen); expensive, but cost might come down.
• Deluge Pump engine is promising; same fuel consumption as Stirling but simpler.
Others
• Thermoelectric (expensive)
• Flowline Generators
• Geothermal
• Fuel Cells (not soon)
BP is testing Whispergen
Stirling at RMOTC
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2nd European Conference on Gas Well Deliquification
Where We Are Going...
All wells end life All wells end life
deliquifieddeliquified......