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2004 Gas-Lift Wo rkshop Joe Dunn Clegg 1 Historical Review of Dual and Multiple Completions By Joe Dunn Clegg
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Historical Review of Dual and Multiple Completions

Dec 30, 2015

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Historical Review of Dual and Multiple Completions. By Joe Dunn Clegg. History. Early Days (1859 to 1900) Spindletop & East Texas: RRC & Proration After WW II: Commingling & Dual Approval The 1950’s & 60’s: Hard times : Duals + The 1960’s: Computers and Offshore - PowerPoint PPT Presentation
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Page 1: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 1

Historical Review of Dual and Multiple Completions

By

Joe Dunn Clegg

Page 2: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 2

History Early Days (1859 to 1900) Spindletop & East Texas: RRC & Proration After WW II: Commingling & Dual Approval The 1950’s & 60’s: Hard times : Duals + The 1960’s: Computers and Offshore The Good Years: 1970 to 1984 Reality and Profitability Using the Best Technology

Page 3: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 3

Multiple Zones

One zone: Only single possible Two or more zones: Development Plan

Needed--How best to produce reserves. Aggie approach: Singles & Plug-Back Well for each zone (expensive) Mix of singles, duals, multiples and

…..recompletions.

Page 4: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 4

Multiple Zones Objective: to make more production with less initial

costs & less operating expenditures .…make more money

Applicable for only limited rates in certain environments….. 2”x 2” for < 1000 bpd x 1000 bpd

Avoid large mismatches in depth and pressure ….… depths < 10%; gradients < 10%

Review potential operating problems/costs Key often a long flowing life Dual artificial lift & workovers usually a problem

$

Page 5: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 5

Annulus-TubingDualforflowing wells

PackerLeakageTests?

Page 6: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 6

Flow CouplingCross-over

Packer

Tubing

Flow CouplingLanding Nipple

Blast JointPolished Nipple

Packer

No-Go Nipple

Perforations

Annulus-TubingDual withCross-Over

Page 7: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 7

Fad in the 1960’s

Work-Overs?

Secondary Recovery?

Unitization?

Little OperatingCost Data Available

CourtesyOtis

Page 8: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 8

Multiple“Tubingless”Completion

Exxon Special

Page 9: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 9

ConcentricDualCompletionTubing

UpperZone

LowerZones

OK forFlowingZonesi.e. Gas Wells

Page 10: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 10

DualParallelGas-Lift

Survivedthe testof time

11

Page 11: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 11

DualParallelGas-Liftw/concentrictbg. string

x Lift Gas

Lower ZoneProduction

o

Upper Zone ProductionNormal gas injection

12

Page 12: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 12

W/GasInjection

String&

SpecialCrossover

9 5/8”Csg

3 1/2” OD Tbg w/

1.9” OD Tbg

(Hydraulic)

(Permanent)

x

X XProposed DualParallelGas-Lift

13

Page 13: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 13

ThreeTubing StringDual Gas-Lift

Rigid<90’

(Hydraulic)

(Hydraulic)

(Permanent)

Outz & Osmus

Casing Size?

Page 14: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 14

Circulating SleeveUpper PumpSealLower Pump

Sucker-rod string

Upper Zone ProductionUpper Zone GasLower Zone Production

Liquid & Gas

Upper Zone

Lower Zone

Dual Rod Pumping: One Beam Unit

o

Schematic

Page 15: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 15

Head to HeadDual BeamRod Pumps

Page 16: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 16

Triple Beam Rod Pumps

Page 17: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 17

Head to Head Dual For Triple Units Single Dual Head

Page 18: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 18

9 5/8” Csg

Lower Zone Power Fluid

All Production +Power Fluid

Upper ZonePower Fluid

Dual Hydraulic

Lower Zone

Upper Zone

CommingledProduction

Page 19: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 19

Dual Hydraulic Pumping: No vents

Production lower pump +all power fluid

Production upper zone

Power fluid for upper pump

Power fluid for lower pump

LP

UP

Page 20: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 20oo

oo

Upper ZonePump

Perforations

Packer

Lower Zone PumpLower Zone

HypotheticalDual ESPInstallation

UpperZone

Feasible but notPractical

Page 21: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 21

Multilateral Dual

Upper Zone Lateral

Lower Zone OpposedMultilateral

Page 22: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 22

MultipleCompletion:

CommingledZones OneTubing String

Page 23: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 23

My Conclusions Singles or Commingling Preferred Duals are profitable for selected cases Multiples (>2) are seldom justified over well life

except for flowing wells Most successful high rate (> 200 BPD) artificial

lift: ...Gas Lift Savings on drilling costs are often lost due to

higher operating costs, higher workover costs and lost reserves

Multiple completions increase stress

Page 24: Historical Review of Dual and Multiple Completions

2004 Gas-Lift Workshop

Joe Dunn Clegg 24

Duals Singles Multiples

The Winner

Special Cases Flowing Wells