EAGE Intrashelf Basin Field Trip
A field trip to Oman over 5 days is considered essential to this Workshop and selected outcrop examples will be visited to highlight the field scale examples of syn-tectonic sedimentation and related basin development. The search for hydrocarbons continues in the Mesozoic as studies have revealed an unknown quantity of undiscovered oil and gas is yet to be found.
While the investment climate remains challenging and the cost per barrel of oil on the market remains uncertain, there is need to forge on with the evaluations of these intrashelf basins to improve finding success and reduce cost. One way is to continue progressing towards the understandings of the hydrocarbon provinces, applying technical best practices to approaches, merging experiences from the exploration business coupled with understandings from the field outcrops. The Arabian Mesozoic carbonate platform is extensive, thousands of wells have been drilled from fields and yet exploration continues relentlessly in the search for hydrocarbons.
Dates: 9-13 October 2017
Venue: trip starts in Ras al Khaimah and finishes in Dubai, United Arab Emirates
Number of participants: 11 (excluding field leader)
Field leader: Dr Christopher Toland, Oolithica Geoscience Ltd
Itinerary (after 1-day technical presentations):
Day 2 (Ras al Khaimah, Northern Emirates). Note –field party departs Dubai at 0730hrs prompt.
- Rams Quarry / Wadi Dhaiyah – attenuated mid-Cretaceous succession (Nahr Umr/Mauddud); absence of Mishrif/Natih across foreland bulge and implications for the ‘Shilaif’ unconventional play fairway of the adjacent inboard area
- Hagil Window – mid-Cretaceous synsedimentary fault-scarp succession; tectonic vs eustatic controls on intrashelf basin-fills; Jurassic-Cretaceous boundary hiatus and implications for Diyab source rock
- Mina Saqr – outcrop of mid-Cretaceous intrashelf basin dysoxic/anoxic facies located inboard of near-emergent ‘outer high’; lithofacies and biofacies characteristics
[Overnight at Ras al Khaimah, UAE]
Day 3 (Field Workshop – Southern Musandam)
- Ausaq – nature of the Mesozoic oceanic shelf-margin; evidence for raised rim, by-pass slope and calving of the shelf-margin
- Happy Hindu Valley – mid-Cretaceous oceanic foreslope succession; implications for reconstructing the updip shelf-margin
[Overnight at Sohar]
Day 4 (Field Workshop – Central Oman Mountains)
- Hawasina Window – seismic-scale Jurassic and Cretaceous shelf-margin succession; offlapping Kimmeridgian raised rim; evidence for end-Shu’aiba synsedimentary faulting and implications for the Bab Intrashelf Basin; nature of the Maududd/Mishrif oceanic shelf margin
[Overnight at Nizwa]
Day 5 (Field Workshop – Central Oman Mountains)
Wadi Ghul – Mishrif (Natih) intrashelf basin-margin; characterisation of dysoxic Natih B (‘Shilaif’) facies; discrimination of superficially similar peritidal vs basin-floor bituminous laminites; basin-margin progrades
Wadi Nakhr – top-Jurassic non-sequence; evidence for long-lived palaeohigh and implications for adjacent intrashelf basin-fill successions
[Overnight in Al Ain, UAE]
Day 6 (Field Workshop – Eastern UAE)
Brief overview of Jebel Hafit growth structure and its relationship to the Cretaceous
South Margham – re-sedimented Nahr Umr/Mauddud platform rim facies (sponge-microbial
Early afternoon departure for Dubai. ETA 1600hrs.
N.B. Parts of this itinerary are physically demanding and will require participants to hike up to 10kms per day in challenging mountainous terrain in an unforgiving climate (temperatures are likely to be in the high 30’s / low 40’s Centigrade at this time of year). Full physical fitness and appropriate field gear (including mountain boots and adequate sun-protection) are mandatory.