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Niadar
May 2016 Page 1North Sea Equity Showcase
Licence details (Block 49/19b)
Block: 49/19b
Licence: P.1914 awarded in 26th Round, 4 year termEffective date: 01/02/12, extended to end Dec 2017
Equity: SR (100%)
Reservoir: Permian
Facies: Rotliegendes aeolian sandstone
Licence: Firm Commitment: Reprocess 300km2 of 3D seismic data to PSDM (completed) & drill a well on Niadar to 2900m to the Leman Sandstone
Niadar
May 2016 Page 3North Sea Equity Showcase
Overview – Sterling Plans
• 3D seismic reprocessing of prospect completed in 2013
• Well planning
– Bottom hole location identified
• On exploration success seek expedient route to development
– Feasibility study on development scenarios via nearby infra-structure
completed
– Positive economics based on current price deck
Niadar
May 2016 Page 4North Sea Equity Showcase
Regional Top Leman Sandstone (Depth), Prospect, Leads and Fields
Niadar
Brigantine
Depth (ft)
Niadar
May 2016 Page 5North Sea Equity Showcase
Regional Seismic Line
Top Chalk
Top
Leman
BCU
Top
Zechstein
Brigantine D
NiaNiadar
Tertiary
Chalk
Lead 2
Lead 6
Triassic
Zechstein
L.Cret.
Carboniferous
Leman Sst..
W E
Depth (ft)
4 km
49/18-5
Niadar
May 2016 Page 6North Sea Equity Showcase
Niadar Top Leman Sandstone (Depth)
CI 200 ft
Minimum contact 9100 ft ?
Brigantine D
Brigantine C
BR Platform
R1
R2
R3
Niadar Prospect
Niadar
May 2016 Page 7North Sea Equity Showcase
Niadar Prospect Illustration – X-Line 2745
R3
Top Leman Penetration
9197 ft TVDss
Niadar Prospect Top Zechstein
Top Leman
Base Permian
1 km
8800 ft
9000 ft
Tie Line Intersection
Dep
th (
ft)
PreSDM Depth Volume
SW NE
Niadar
May 2016 Page 8North Sea Equity Showcase
Tie Line to Illustrate the Leman Pick in the Upthrown Block
Intersection with X-line 2745
Imaging problems
(over-migration)
Top Zechstein
Top Leman
Base Permian
Dep
th (
ft)
1 kmPreSDM Depth Volume
NW SW
Niadar
May 2016 Page 9North Sea Equity Showcase
49/13-2X
49/14a-2
49/18-249/18-5z
49/19-1
49/19-3
49/19-5
49/19-6Y
49/19-749/19-R1
49/19-R2
49/19-R3 (UT)
7500
8000
8500
9000
9500
10000
7500 8000 8500 9000 9500 10000
Wel
l Dep
th (
ft)
TVD
ss
PSDM Depth (ft) TVDss
PSDM vs Actual Top Leman Sandstone Depth
PSDM Top Rotliegend Depth Prediction Error at Wells
374 ft
Top Leman
Depth TVDss
Grid : Top Leman Depth PSDM Rev4
Well Grid depth (ft) Well depth (TVDss ft) Difference
49/13-2X 9946 9913 -33
49/14a-2 9476 9737 261
49/18-2 8706 8750 44
49/18-5z 8880 8805 -75
49/19-1 7919 7926 7
49/19-3 7850 7832 -18
49/19-5 8098 7989 -109
49/19-6 7513 7417 -96
49/19-6Y 8216 8211 -5
49/19-7 7839 7987 148
49/19-G1 7465 7402 -63
49/19-G2 7315 7297 -18
49/19-R1 7766 7936 170
49/19-R2 8413 8326 -87
49/19-R3 (DT) 9267 9193 -74
49/19-R3 (UT) 8819 9193 374
Exc. R3 (UT) Average 3
Standard Deviation 109
Niadar
May 2016 Page 10North Sea Equity Showcase
Multi Layer Depth Conversion Workflow
• The following interpreted layers were used in the depth conversion
1. MSL to Seabed
2. Seabed to Base Tertiary
3. Base Tertiary to Base Chalk
4. Base Chalk to Top Zechstein
5. Top Zechstein to Base Zechstein
– In some realisations, the Zechstein was further divided into a hard layer (anhydrite, dolomite) and soft layer (salts). In this case, the hard-rock thickness was estimated by kriging thicknesses encountered in the wells.
• Work was undertaken by Earthworks using HIIP software
• Well data from R3 not provided or included
Niadar
May 2016 Page 11North Sea Equity Showcase
Impact on Niadar Area – Depth X-Section (Xline 2745)
Depth
TVDss (ft)
Uncorrected PreSDM (depth)
Corrected PreSDM (depth)
Earthworks Best Technical (not tied to R3)
Alternative Earthworks Outcomes (not tied to R3)
Niadar Prospect
R3
(orthogonal to
trajectory)
Top Leman Penetration
9197 ft TVDss
Niadar
May 2016 Page 12North Sea Equity Showcase
Depth Conversion Summary
• All depth conversion methods suggest that the R3 Top
Rotliegendes is more likely to have penetrated the
downthrown side of the fault
• The multi-layer depth conversion methods are generally
predicting shallower depths than the PreSDM depth
volume, in the Niadar area
Niadar
May 2016 Page 13North Sea Equity Showcase
Niadar Petrel Modelling
R3
Brigantine development Niadar BTC Depth Structure Map
Niadar
May 2016 Page 14North Sea Equity Showcase
Niadar Volumetrics (variable contact)
MinimumCrest 8375ft ss
GWC 9100ft ss
Avg Phi 15%
Avg Sw 35%
FVF 240
IGIP 61bcf
BTCCrest 8375ft ss
GWC 9250ft ss
Avg Phi 15%
Avg Sw 25%
FVF 240
IGIP 109bcf
MaxCrest 8375ft ss
GWC 9600ft ss
Avg Phi 15%
Avg Sw 15%
FVF 240
IGIP 227bcf