P1654 – Block 15/18c
Relinquishment Report
Date:
May 2011
Document No:
BEL-EXPL-021 Rev1
Page 1 of 9
Licence P1654 – 25th Round – Tradiotional – Block 15/18c
Document No: BEL-EXPL-021
Revision No: 01
Document Approval, Distribution & Revision
Prepared by:
Signature
Amanda Slorach
Reviewed by:
Alasdair MacMillan
…………….
Approved for Issue:
Kevin Purvis
……………..
Report Distribution
Copy Number
Recipients
1
DECC
2
Bridge Energy - Aberdeen
3
Cirrus
4
Document Revision
Revision Number
1
Description
Date
Prepared by
Relinquishment Report
11/05/11
Amanda Slorach
2
3
Date: May 2011
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
Document No: BEL-EXPL-021
Revision No: 01
Contents
Document Approval, Distribution & Revision ..............................................................................2
Contents .....................................................................................................................................3
List of Figures .............................................................................................................................3
1.0 Header ................................................................................................................................4
2.0 Synopsis .............................................................................................................................4
3.0 Exploration Activities ..........................................................................................................4
4.0 Prospectivity Analysis .........................................................................................................5
5.0 Clearance ...........................................................................................................................5
6.0 Maps and Figures ...............................................................................................................6
List of Figures
Figure 1:
15/18c - Location Map
Figure 2:
Daffodil - CSEM Line Location
Figure 3:
Daffodil Seismic Line (NW-SE)
Figure 4:
Daffodil – Top Forties Depth Map (Amplitude Colour Fill)
Date: May 2011
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
1.0
Document No: BEL-EXPL-021
Revision No: 01
Header
Licence Number:
Licence Round:
Licence Type:
Block Number:
Operator:
Partners:
P1654
25th Round
Traditional
15/18c
Bridge Energy CNS Limited (50%)
Cirrus Energy (50%)
Work Programme:
Reprocess 60 sq km of 3D seismic data
Acquire one 5 km CSEM profile
Commit to drill or drop within two years (1 well to 1700 m to evaluate the
Balmoral Sandstone)
2.0
Synopsis
Licence P1654 (Block 15/18c) was awarded to Silverstone Energy (now known as Bridge
Energy) under the 25th Licensing Round with a commencement date of 12th February
2009. A drill-or-drop decision was due by 12th February 2011.
The block is situated due east of the Piper field (Figure 1). Trap definition and closure
were seen as the key issues.
The key intervals for investigation were the high quality deep waters sands of the Forties,
Fergie and Balmoral. Local success in the Forties and Balmoral had been experienced at
Maria (15/18a) and Yeoman (15/18b) respectively.
Unfortunately no CSEM anomaly was found over the Daffodil prospect, whilst visible
seismic amplitude changes were thought to be lithology rather than fluid related. The
partnership therefore sees no prospectivity and wish to relinquish the block with
immediate effect.
3.0
Exploration Activities
60 sq km of reprocessed 3D seismic was obtained from Fugro in order to satisfy the work
commitment. In addition, a 5 km CSEM line was acquired in Q4 2010 by OHM (Figure 2).
This data was processed, interpreted and assimilated with the seismic interpretation in an
attempt to de-risk the presence of reservoir and hydrocarbons.
Date: May 2011
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
4.0
Document No: BEL-EXPL-021
Revision No: 01
Prospectivity Analysis
A thorough investigation of the geology of the area was undertaken. The Palaeocene and
Eocene are characterised by the presence of high quality deep water mass flow sands
offering excellent reservoir quality. These systems were found to be mutually exclusive as
they are known to shift course after each significant pulse of sedimentation. Any
accumulation in place will require the interaction between channel system presence and
trap.
The main prospect identified was the Daffodil prospect (figures 3 and 4), a 4-way closure
identified on the same Forties channel up-dip of the Maria Discovery. Whilst the structure
was not closed in time, a velocity gradient exists which may result in depth closure with
some additional stratigraphic trapping upside. Rock physics and seismic studies indicate
that any amplitude changes visible on Daffodil are likely lithology and not fluid related.
Unfortunately no CSEM anomaly was witnessed over Daffodil. The group therefore see
no further method of de-risking the prospect and wish to relinquish the licence with
immediate effect.
No volumetrics were calculated for Daffodil.
5.0
Clearance
Partners have reviewed the material within this report and have given clearance that
DECC is free to publish this document. All 3rd party ownership rights have been
considered and appropriately cleared for publication purpose.
Date: May 2011
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
6.0
Document No: BEL-EXPL-021
Revision No: 01
Maps and Figures
Figure 1:
Date: May 2011
15/18c - Location Map
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
Figure 2:
Date: May 2011
Document No: BEL-EXPL-021
Revision No: 01
Daffodil - CSEM Line Location
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
Document No: BEL-EXPL-021
Revision No: 01
Figure 3: Daffodil Seismic Line (NW-SE)
Date: May 2011
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Licence P1654 – 25th Round – Tradiotional – Block 15/18c
Document No: BEL-EXPL-021
Revision No: 01
Figure 4 - Daffodil – Top Forties Depth Map (Amplitude Colour Fill)
Date: May 2011
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