Embed Size (px)
Citation preview
spectrumgeo.com
New Deep Water 3D Multi-Client Broadband Seismic
Dome Flore
Block 2(Sinapa)SVENSKA
UDO-TEATOTAL
Ultra DeepBlock 1
TENDER OG
RufisqueOffshore
CAPRICORN
SangomarOffshore
CAPRICORN
SangomarOffshore DeepCAPRICORN
Block A1AFRICAN PT
Block A4AFRICAN PT
Block A5MERIDIAN M
Block A2MERIDIAN M
Senegal OffshoreSud ProfondAFRICAN PT
AGC ProfondCNOOC
AGCCentralOP AGC
DjiffereOffshore
TRACE ATL
Cayar OffshoreShallowORANTO
Ultra Deep Block 3RHINO RES
Ultra DeepBlock 2
TENDER OG
RufisqueOffshore Profond
TOTAL
Cayar OffshoreProfond
KOSMOS ENI
Lower River
Block A3
Block A6
Rufisque 31419
DakarMarine 24253
Rufisque 21845
DakarMarine 13761
CasamanceMaritime 082523
CasamanceMaritime 10
1145
F 5663
G 21056
F 6914
G 1A1096
CasamanceMaritime 073586
CasamanceMaritime 031765
Portuguese GuineaOffshore 12482
Portuguese GuineaOffshore 33881
Jammah 13020
Grand LargeOuest 12842
Wolof 14737
CasamanceMaritime 044238
GuineaBissau 13805
Sheepshead 13320
CasamanceMaritime 052786
CasamanceMaritime 02
3788
CasamanceMaritime 014110
Cap VertMarine 14271
Sencan 112468
Diola 11818
Dorado 12200
SNE 5SNE 3
SNE 2
SF 4845
F 7892
Kora 14447.5
SNE 13107
Fan 14927
Bellatrix 1
SNE 42970
Samo 1
Vega-Regulus 13899
SNENorth 1
2837
FAN South 15343
Dakar
Banjul
Brikama
Diourbel
Ziguinchor
Fatick
Thies
S e n e g a l
G a m b i a
G u i n e a - B i s s a u
Phase I(3866 sq.km)
Phase II(3287
sq.km)
8102Af01Ga71
In co-operation with the Commissioner for Petroleum, Republic of The Gambia, Spectrum plan to acquire and Broadband process upto 7,000 km2 long offset (8km) deep water 3D seismic offshore The Republic of Gambia.
These 3D’s are outboard of the Jurassic to Aptian carbonate platform margin edge , covering the narrow Jurassic syn-rift and possible SDR’s of the outer high and oceanic crust. The 3D’s will target mixed system clastic plays basin floor fans similar to the contourite modified basin floor fans of Yaakar, of both Cenomanian, Albian and Late Jurassic.
Spectrum’s seismic 2D dataset offshore The Gambia has recently been fully Broadband reprocessed through comprehensive PSTM and PSDM work flows. Angle stacks and gathers are available for attribute analysis. This seismic data clearly defines the basin floor fan slope play (as seen in the FAN-1 discovery) and shelf margin plays both on the Albian sand shelf edge (SNE discoveries) and Cenomanian sand buried hill (Belatrix-1 discovery).
Success at the FAN-1 and SNE-1 discoveries has improved the potential for on-trend deep-water hydrocarbon accumulations in The Gambia, in a similar setting to the Taranga-1 and Yakaar-1 discoveries in northern Senegal. A 3D project has been agreed with the Gambian government to evaluate this potential for upcoming bid rounds.
LegendGambia 3D Deep Water Proposal ph1: 3,866 km2
Gambia 3D Deep Water Proposal ph2: 3,287 km2
Gambia Broadband Reprocessing: 4,460 kmBid Round Blocks
The Gambia
spectrumgeo.comFollow us: @SpectrumGeo
For more information please contact Spectrum’s Multi-Client sales teams:
United Kingdom Spectrum Geo Ltdt: +44 1483 730201 f: +44 1483 762620 e: [email protected]
United StatesSpectrum Geo Inct: +1 281 647 0602f: +1 281 589 8111e: [email protected]
NorwaySpectrum ASAt: +47 230 14960f: +47 230 14961e: [email protected]
AustraliaSpectrum Geo Pty Ltdt: +61 8 6324 3900f: +61 8 6324 3999e: [email protected]
Multi-Client 2D Seismic
In order to de-risk source rock presence, quality and maturity over the proposed 3D area, a detailed source rock characterization has been carried out. Low frequency packages were initially identified as candidate source rocks. The top and base picks of these units were in turn refined using the criteria that “top and base of thick (>20m) organic-rich claystones should be expressed by a
significant reduction and increase in AI respectively“. Finally the AVO response for each of the “candidate” source rocks was tested. Excellent quality source rock character was identified for the horizon inferred to relate to the “Black Shale” Albian-Turonian source rock encountered in DSDP0367, estimated to have TOC% of 3-10%. Both structural 4 way dip closed structures draping over
basement highs and high amplitude basin floor fan stratigraphic traps overlie this high quality source rock, expected to be in the oil maturity window. Significant potential offshore The Gambia, to be offered in upcoming bid rounds, can be fully evaluated using Spectrum’s existing 2D and future 3D datasets.
