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Case File
303 Multilateral Completion – Onshore Nigeria
Project
Objectives
The Imo
River well was completed as a Level 6 multilateral due to the need for
hydraulic isolation at the junction between the main bore and each
lateral. The customer wanted a low risk ML deployment that would allow the
introduction of the technology to the region that would result in standard
field development using this technology. The operator plans on using Level
6 technology as standard field development options in situations were
having multiple wellbores yield better recovery and cost savings.
Project
Details |
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Contact Information |
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| Project
Date:
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November
1999 |
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Main
Bore Csg. Size to Surface:
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13-3/8”
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| Well
Location:
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Onshore
Nigeria |
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Junction
Deployment:
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4,900'
MD @ 6°
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| Well
Type:
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New
Well |
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Lateral
Casing Size:
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7-5/8
x 7-5/8
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| Formation/Lithology:
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Sandstone |
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Lateral
Casing Size#2:
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5-1/2”
x 5-1/2”
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| Final
Lateral Liner Size:
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3-1/2”
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Lateral
Lengths
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| Junction
Type:
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Deep
Set Splitter Level 6
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#1
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8,300ft,
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#2
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8,000ft
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Lateral
Hole size into Formation:
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4-1/2”
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Completion
Description
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A
17.5” hole was drilled to 4,900ft with a 6degree deviation at
the final section to allow the functioning of MWD to determine
the orientation of the Deep Set Splitter (DSS) when it has
landed.
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The
DSS was run to depth and the orientation of it determined.
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The
Riser Diverter System was deployed to isolate Leg#1 for well
construction.
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The
first stage of lateral #1 was drilled out of the 7-5/8” casing
using RWD to a hole size of 7”.
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A
5-1/2” lateral liner was then run and cemented back to the
7-5/8” casing. Standard liner hander and liner packer was used
to link the 5-1/2” to 7-5/8” casing.
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A
5” hole was then drilled out of the 5-1/2” casing using RWD
bits.
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A
3-1/2” production liner was run and cemented back to the 5-/2”
casing.
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A
completion tubing string was run that landed into the top of the
3-1/2 liner packer and anchored with a production packer set
about the liner hanger in the 7-5/8 casing.
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The
Riser Diverter System was then released and switched to isolate
lateral Leg#2.
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Lateral
Leg#2 was drilled and completed identical to lateral Leg#1
.
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A
final dual completion 3- 1/2 x 3-1/2 tubing string was run that
anchored into the completion packers located in each 7-5/8”
lateral casing leg via a Scoophead Diverter System to maintain
correct tubing orientation and landing.
BHI
Products & Services
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Baker
Oil Tools: Fishing, Liner Hanger, Completions,
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Hughes
Christensen: Drill Bits,
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INTEQ:
Drilling
Project
Results
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All
project objectives were met with no rig time lost problems due
to the ML system.
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First
deployment of Deep Set Splitter System size 13-3/8 x 7-5/8 x
7-5/8
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Use
of Ream While Drilling Bit technology.
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First
deployment of Riser Diverter System that allowed isolation of
each leg during lateral completion.
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First
deployment of new Scoop Head Diverter System.
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Case 302
