operations and requirements fpso and shuttle tanker...
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Operations and Requirements
FPSO and Shuttle Tanker Positioning
Chris Jenman
Global Maritime, Inc.
October 17-18, 2006
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MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
FPSO & Shuttle Tanker Positioning
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
FPSO and Shuttle Tanker
Separation about 70m
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Background• Ref 1 QRA of shuttle tanker collisions
published 1998 (all types all areas)• HSE in the UK set a target for improvement• Contracted Global Maritime in 2001 and
2004 to independently assess improvement• FPSOs & DP tanker offtake increasing • What are the present risks?
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Position from 1998 ReportOFFSHORE OFFTAKE TANKER OPERATIONS - NUMBERS OF COLLISIONS and OTHER
STATION KEEPING INCIDENTS BY YEAR 1979 - 1998
0
100
200
300
400
500
600
700
800
900
1000
1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
YEAR
NUMB
ER O
F OFF
TAKE
0
2
4
6
8
10
12
14
16
18
20
NUMBER OF INCIDENT
Number of offtakes
Other Station Keeping Incidents
Contact Incidents
Trend of Station Keeping Incidents 1979-1998
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
1998 Shuttle Tanker QRA Report
– Loss of Life– Collision– Major Near Miss– Minor Near Miss– Collision frequency per
DP hour 5.89x10 -5
1
14
63
78
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Incident Types• Re-categorised (expanded) the four levels
– L1 -Loss of Position and Loss of Life or Major Pollution
– L2 - Loss of Position and Collision with Loading Point, ESD and Minor Pollution
– L3 -Loss of Position causing ESD, near miss or high Hawser Tension
– L4 -Station Keeping problem causing concern to operator
L1
L2
L3
L4
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Incident Frequencies
– L1 - Loss of Position and Loss of Life or Major Pollution
– L2 - Loss of Position and Collision with Loading Point, ESD and Minor Pollution
– L3 - Loss of Position causing ESD, near miss or high Hawser Tension
– L4 - Station Keeping problem causing concern to operator
L1 3.92 x 10-6
L2 5.89 x 10-5
L3 4.94 x 10-4
L4 3.06 x 10-3
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
People, procedures, position references & propellers
The collision frequency of 5.89 x 10-5 per DP hour was far too high especially with an increasing number of tankers offtakes being performed.
The incident frequency was also too high; the expectation of the 1998 QRA study was 7 incidents per vessel per year.
The UK HSE had set a target to deliver a 25% improvement and wanted to prove it had been achieved.
Problems
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
1998 - 2001 Data
Distribution by level • 6 of 16 reported to HSE (37.5%)
• Total hours 41,638• Frequency of level 2
incidents 3.84 x10-4
• About once in every 108 loadings
0
16
40
24
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Distribution of Type II Incidents 1998 to 2001
0
1
2
3
4
5
1998 1999 2000 2001Year
Num
ber o
f Inc
iden
ts
There was only one incident that resulted in collision
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
1998 - 2001
Distribution by level • To compare with the ‘98 work only collisions should be placed in Level 2
0
1
15
64
0
15+1
40
24
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Comparison before and after1998
• To 1998
• Collision frequency 5.89x10-5
• 1998 - 2001
• Collision frequency 2.4x10 -5
1
14
63
78
0
1
15
64
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Distribution of Type II Incidents 1998 to August 2004
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
1998 1999 2000 2001 2002 2003 2004
Year
Num
ber
of In
cide
nts Type II
There were no level II incidents reported in 2004
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Comparison before and after1998
• To 1998
• Collision frequency 5.89x10-5
• 1998 - 2004
• Collision frequency 1.45x10-5
1
14
63
78
0
1
18
84
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
19981999
20002001
20022003
2004
I
II
III
IV
0
5
10
15
20
25
30
Num
ber o
f inc
iden
ts
Year
Type
Distribution of Incidents 1998 to August 2004
IIIIIIIV
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Causes of Improvement• Close attention by Oil Companies backed
by good budgets and pushed by authorities.• Training and Auditing by owners and Oil
Companies.• Better procedures and DP CAP
(DP Competence Assurance Practice)
• Tanker Offtake simulator training.• Improvement in hardware and software.
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Create a programme to secure practical DP experience to the Shuttle Tanker DPO’s.
- Shuttle tankers are operating as little as 5-10% of total operational time on DP.
DP Cap TM aim :
increase the DP practice time
make DP practice time more qualitative
DP CAP TM ; Scope of Work for the development programme
Taken from IMCA seminar 2004 Teekay presentation
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Hardware & Software
105m
15°15°
30° 30°
SHUTDOWN
SHUTTLE TANKER / FPSO HEADING DIFFERENCE 50°ESD CLASS 2 SHUTDOWN SHUTTLE TANKER / FPSO HEADING
DIFFERENCE 15°HEADING DIFFERENCE ALARM
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Typical DP Display showing short and long distance alarms
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Remaining Problems (FPSO)• Heading control• Marine Personnel• Weather (limits & visibility)• Position References• Consistent Standard• Thruster reliability
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Shuttle Tanker Approaching FPSO
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Approach Continues Satisfactorily
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
FPSO Changes Heading and Approach is Lost
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Remaining Problems (Shuttle Tanker)• Maintaining the improvement• DP Class 2 or Class 1 or 1.75?• Personnel Changes• DP Control System differences• DP experience• Position References• Consistent Standard• Thruster reliability
– control 4.35x10-5 - ME/DG 4.35x10-5 - Thruster fail 1.45x10-5
• Misalignment
MTS 2006 FPSO and Shuttle Tanker Positioning
Global Maritime - Chris Jenman Presentation
Conclusions• There has been a marked improvement in
DP shuttle tanker safety• There are still some areas that need
attention• The biggest challenge is to maintain the
improvement• If there is a significant collision one of the
likely findings will be inconsistency