Dewatering WET CBM – San Juan ESP,PCP & Downhole Data Field Trialalrdc.com/workshops/2010_2010GasWellWorkshop/Priv… · · 2012-11-20Gas Well Deliquification Workshop Sheraton

Gas Well Deliquification WorkshopSheraton Hotel, Denver, Colorado

February 22 - 24, 2010

Dewatering WET CBM – San JuanESP,PCP & Downhole Data Field TrialNicholas Beidas & Josh Prather - Baker Hughes Centrilift

Allen Kutch & Peter Oyewole - BP

Content

• Mission

• Challenges

• ESP, PCP, ESPCP, ESP-TTC & ESPCP-TTC (Brief Discussion)

• Artificial Lift Monitoring & Optimization

• Applications & Field results

– Jean Gas Unit 21 13 #1

– Le Platt Gas Unit #1

– Mc Caw D1

Feb. 22 - 24, 2010 2010 Gas Well Deliquification WorkshopDenver, Colorado

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Mission

To effectively dewater wet CBM wells (lower pump failurefrequency and intervention cost) in spite of challenges.

Challenges

• Varied Liquid Production Volume

– High Initial Liquid Rate

• Solids

– Coal fines and Frac Sand flow back

• Wellbore Profile

– Deviated, S-shaped, Horizontal and Multi-Lateral

• Gas Interference Problems

• Rodless Application

– No Rod issues: “sometimes we have to get rid of the rodstring”

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Challenges

• High rig costs

– Rigless Intervention

• Sitting below the perfs

– There may be no rathole

• Handling CO2 & Paraffin

• Low Land Visibility

– Aesthetics - Low Profile Point

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6

Basic Electrical Submersible Pump (ESP)

Transformer

VSDStep-Up Transformer

Cable

Pump

Seal

Sensor

Motor

Junction Box

Power Ride Through(optional)


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Basic Progressing Cavity Pump (PCP)

• Is a positive displacement pump

• Uses progressing sealed cavities to move fluids

• Two main components– Single Helix Rotor (usually hard-chromed)

– Double Helix Stator (usually molded elastomer in a steelhousing)

• PCP benefits include– High system efficiency

– Low power consumption

– Pumps sand, viscous, or gaseous fluids

– Relatively low surface equipment profile

Stator

Rotor


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Electric Submersible ProgressingCavity Pump (ESPCP)

PCP

Flex Shaft and Intake

Seal Section

VSD

Gear Reducer

Electric Motor

Tubing String


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ESP-TTC & ESPCP-TTC

Through Tubing Conveyed

• ESP-TTC

• ESPCP-TTC


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VSD – AL Monitoring & Optimization

• Pumping equipment operates at a constant speed without aVSD.

• Pumping Speed most often doesn’t match up with ReservoirInflow

• VSD - Essential & Extremely Important ( “No longer aLuxury”)


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Artificial Lift Monitoring & Optimization

• Downhole data in combination with VSD optimizesproduction & protects equipment

• It provides information that aids in proper understanding ofAL conditions

– Reservoir flow is typically not in steady state

– Usually Erratic (wave of fluid (gas & liquid) and sometimes solids)

• Operation Philosophy: Maintain constant Pwf (fluid level) byletting the VSD speed up and down as required within Min &Max frequency range


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Jean Gas Unit 21 13 #1

Converted from HDESP to ESPCP-TTC in 2008

Milestone & Uniqueness of Jean 21 13 #1 well

• The first 2 7/8” TTC deployment in the world

– Prior to the Jean, deployment has been in the bigger 3 ½”tubing. (Low water rate & 5 ½” casing drove thedevelopment of 2 7/8” deployed PCP.)

• Cut Slickline deployment from 3 runs to 1 run.

• New mechanical lock


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Jean Gas Unit 21 13 #1

Milestone & Uniqueness of Jean 21 13 #1 well

• VSD set on Pressure control using downhole sensor• Downhole sensors provide:

– Pump Intake Pressure & Temperature, Pump DischargePressure, Motor Temperature, System vibration

– Information delivered to Desktop via realtime data stream• Properly interpreted data enable us to be more proactive

rather than reactionary


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Application & Field Results

Jean 21 13 #1

• 53 ft of Rathole –From intake toPerf Bottom

• Landed belowPerforationwithout a Shroud

• Well is Pumped(0.007psi/ft:~11psi DP oncasing to intake)

1 – Downhole Sensor

1 – Discharge Sub

Compressed Wellbore Diagram


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Field Results

ESPCP-TTC Installed


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Field Results

ESPCP-TTC Installed


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Field Results


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Field Results


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Le Platt Gas Unit #1

• The very first field trial well installed in November, 2005

• ESPCP-TTC : PC Pump deployed in 3 ½” Tubing onSlickline with 3 runs

• Ran for 907 days

• Failure Cause – Human Error led to Downhole Motor Failure

• Back on Production and Monitoring (9/1/08)


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Field Results

ESPCP-TTC Re-installed


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Field Results



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Field Results



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Mc Caw D1

• It has been on Artificial Lift since 1991

• Had history of Tubing Leaks

• Installed ESPCP in 2006, Not too successful

– Unable to drawdown fluid level

– Required more HP

• After Refrac – Installed ESP with downhole desander in 2008

• Monitored draw down with pressure control set point

– Running well!


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Field Results

ESPCPESP

Lessons Learned

• Need for Sufficient HP for ESPCP

– No more ESPCP: Only ESPCP-TTC & ESP

• Adequate Monitoring and Optimization –key tosuccessful application

• Note: We performed Slickline pulls successful(except One)

Value

• Reduce Intervention Cost (In 2008, there were > 25 RigPCP repairs, some without a need for a clean-out job)

• By annually switching 20 rig intervention PCP repairs($92,250 Average) to Rigless PCP repairs ($15,000Average), savings of $1,545, 000/year. Better wellworkefficiency

• Reduce production losses (reduction in mean timebetween pump failure and pump change) – This will helpget wells back on production earlier than we are currentlydoing

• Increase run life (reduce failure mechanism associatedwith rods)

Content

• Mission

• Challenges

• ESP, PCP, ESPCP, ESP-TTC & ESPCP-TTC (Brief Discussion)

• Artificial lift Monitoring & Optimization

• Applications & Field results

– Jean Gas Unit 21 13 #1

– Le Platt Gas Unit #1

– Mc Caw D1


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Copyright

Rights to this presentation are owned by the company(ies) and/orauthor(s) listed on the title page. By submitting this presentation to theGas Well Deliquification Workshop, they grant to the Workshop, theArtificial Lift Research and Development Council (ALRDC), and theSouthwestern Petroleum Short Course (SWPSC), rights to:

– Display the presentation at the Workshop.

– Place it on the www.alrdc.com web site, with access to the site to be asdirected by the Workshop Steering Committee.

– Place it on a CD for distribution and/or sale as directed by the WorkshopSteering Committee.

Other use of this presentation is prohibited without the expressed writtenpermission of the author(s). The owner company(ies) and/or author(s)may publish this material in other journals or magazines if they refer tothe Gas Well Deliquification Workshop where it was first presented.

Feb. 22 -24, 2010 2010 Gas Well Deliquification WorkshopDenver, Colorado

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DisclaimerThe following disclaimer shall be included as the last page of a Technical Presentation or ContinuingEducation Course. A similar disclaimer is included on the front page of the Gas Well Deliquification WebSite.

The Artificial Lift Research and Development Council and its officers and trustees, and the Gas WellDeliquification Workshop Steering Committee members, and their supporting organizations andcompanies (here-in-after referred to as the Sponsoring Organizations), and the author(s) of this TechnicalPresentation or Continuing Education Training Course and their company(ies), provide this presentationand/or training material at the Gas Well Deliquification Workshop "as is" without any warranty of any kind,express or implied, as to the accuracy of the information or the products or services referred to by anypresenter (in so far as such warranties may be excluded under any relevant law) and these members andtheir companies will not be liable for unlawful actions and any losses or damage that may result from useof any presentation as a consequence of any inaccuracies in, or any omission from, the information whichtherein may be contained.

The views, opinions, and conclusions expressed in these presentations and/or training materials are thoseof the author and not necessarily those of the Sponsoring Organizations. The author is solely responsiblefor the content of the materials.

The Sponsoring Organizations cannot and do not warrant the accuracy of these documents beyond thesource documents, although we do make every attempt to work from authoritative sources. TheSponsoring Organizations provide these presentations and/or training materials as a service. TheSponsoring Organizations make no representations or warranties, express or implied, with respect to thepresentations and/or training materials, or any part thereof, including any warrantees of title, non-infringement of copyright or patent rights of others, merchantability, or fitness or suitability for anypurpose.

Documents

Dewatering WET CBM – San Juan ESP,PCP & Downhole Data Field Trialalrdc.com/workshops/2010_2010GasWellWorkshop/Priv… · · 2012-11-20Gas Well Deliquification Workshop Sheraton