Subsea
Light Well Intervention
Light Well Intervention
World wide there are more than 6000 SS wells, and the number is growing.
The recovery rate from SS wells is most often less than 40 % vs 50 – 60 %
on dry wells. Increased Oils Recovery from SS wells by use of Light Well
Intervention Vessels is extremely cost effective vs Semi Submersible Rigs.
Strong growth in subsea wells drives demand for subsea
services from advanced and versatile offshore vessels
Development in global subsea wells
Global subsea wells by customer (2014-2017)
679
700
650
618
550
530
500
583
600
450
550
500
638
519
462
450
400
452
432
350
416
400
374
350
318
300
311
250
300
206
250
200
200
150
156
150
139
134
124
90
100
100
64
58
58
EN
I
Exxo
n
Mobil
Premie
r Oil
50
50
0
0
200
6
200
7
200
8
200
9
201
0
Exploration Drilling
Top hole drilling
201
1
201
2
2013 2014 2015 2016 2017
e
e
e
e
e
Installation &
Construction
Subsea &
IMR
Source: Quest Offshore Resources Inc. (November 2013)
Petrobra Statoi
s
l
BP
Production
IOR and IMR
Shel
l
Tota
l
Chevro Anadark
n
o
Decommissioning
Plug &
Abandonment
Ageing Subsea fields need well intervention and
maintenance
Average age of producing subsea wells
Subsea wells producing for more than 5 years
5,000
NWECS1: 11.8
years
+9%
4,500
4,000
3,500
3,000
2,500
North America: 8.9
years
2,000
1,500
1,000
West Africa: 6.1
years
South East Asia: 11.2 years 500
0
Brazil: 11.2
years
Exploration Drilling
Top hole drilling
Source: Infield, 2014; Infield, 2013
1) Northwest Europe Continental Shelf
201
2
Installation &
Construction
Subsea &
IMR
2013
e
Production
IOR and IMR
2014
e
2015
e
2016
e
Decommissioning
Plug &
Abandonment
Background
•
FMC`s Subsea Lubricator used on Regalia
in 2003. 3 successful interventions
•
Island Frontier delivered in 2004
•
Alliance between Island Offshore, FMC
and Aker established in 2004
•
2005
 Performed Well Intervention on
Chevron Stathspey project
 Awarded the long term contact with
Statoil (6+3 years)
 Intervention on two Nexen UK Wells
•
2006 awarded the BP contract 3 + 2
years for West of Shetland primarily,
commencing May 2009
The Vessels
Island Frontier
Island Constructor
Island Wellserver
Island Performer
Wireline Services
Most common RLWI services
•
Well integrity
•
Caliper logging of wells
•
Data collection (oil, water, gas)
•
Mechanical repairs (e.g. DHSV replacement)
•
Water shut off (plug setting)
•
Zonal isolation (plug or straddle)
•
Perforation - Re-perforation
Wireline Services
Most common RLWI services
•
Mechanical scale removal (milling)
•
Mechanical hydrate removal (milling)
•
X-mas tree interventions
•
Tubing cutting –explosive or mechanical
cutting
•
Sand or debris removal
•
Honing and refurbishing of seal areas
•
Manipulation of sleeves and side pocket
mandrels
Challenging work
Vigdis C-5 Well
Installation of Straddle to
Isolate a non producing
zone
•
280 m water depth
•
Straddle length 53 m
•
Well bore length 3850 m
•
Depth at end of well 2250 m
•
Horizontal climb 117 deg.
•
Duration of job 45 days
Track Record
• More than 270 Light Well
Interventions since 2005
• More than 95 % of the jobs were
successful
• Jobs lasting 10 – 45 days
• Increased revenues for clients –
billions
Main focus from Authorities (PSA & NMD)
To maintain barriers in every
form
•
Pressure control
•
Technical barriers
•
Human barriers
•
System barriers
Security
•
Integrity
Division of Responsibility
• Client takes over responsibility
when the tool-string enters the
well
• IO resumes responsibility when
the tool-string leaves the well
• Client is responsible for all cost
related to damage to the well
• Client is responsible for all cost
related to blow-outs or similar
accidents
• All except for gross misconduct
People
The LWI-segment employs more than
400 people in Island Offshore
•
All recruited internally
•
Operating as vessels
•
Focus on cross-training and multiskilling
•
Retention rate 95 %
•
High level of competence
•
First class safety records
•
Shore staff with engineering support
The future
Thank You for your attention!