ICE FT 03 | Evaluating the Expression of Petroleum Plays at Outcrop: An Example From the Jurassic of the Pas-de-Calais, Northern France
American Association of Petroleum Geologists (AAPG)
Thursday, 12 October – Saturday, 14 October 2017, 9:00 a.m.–8:00 p.m. | France
Who Should Attend
Petroleum geologists with an interest in understanding the stratigraphical and sedimentological architecture of shallow-marine clastic successions.
Objectives
The objectives of the trip are to gain:
- An understanding of the scale of sedimentary heterogeneities in analogues for shallow-marine reservoirs.
- An appreciation for the controls on source rocks intercalated with these rocks.
- An awareness of the application of sequence stratigraphy to these successions.
Course Content
North of Boulogne (Pas-de-Calais, France), the architectural expression of near and offshore Late Jurassic clastics is excellently exposed within coastal cliffs. These outcrops provide an analogue for shallow-marine petroleum system elements and plays. Potential reservoirs, seals and source rocks are all clearly expressed and are supplemented with wireline log data from near-outcrop boreholes. These exposures allow sedimentological, paleontological and ichnological observations to be interpreted, which also provide a basis for assessing the levels of oxygenation within the water column. Collectively, these interpretations can be integrated into a sequence stratigraphic framework to provide a tool for predicting stratigraphic architecture.
Lower Carboniferous carbonates and Upper Cretaceous chalks will also be analysed. These exposures provide a sample of the subcrop to the Jurassic and insight into the nature of the post-Jurassic burial.
Itinerary Roster
Day 1
The fieldtrip will commence at the Eurostar Calais Frethun Station, 12 October at 09:00.
- Stop 1 — Cap Blanc Nez — The spectacular cliffs to the north of Wissant expose Cenomanian to Turonian chalks.
Lunch — Wissant
- Stop 2 — Pointe de la Crèche, North of Boulogne Harbor — a walk through upper Kimmeridgian to Tithonian offshore to shallow-marine clastics. Paleontological contents will be noted and models for sea-level change discussed. Paleo-oxygenation levels will also be assessed and their influence on the development of source rocks. The nature of a ravinement surface and its overlying retrograde parasequence set will also be described.
- Stop 3 — Wimereux — an evaluation of the remainder of Tithonian successions, with a focus on changing paleoenvironmental conditions.
Accommodation: Wimereux
Day 2
Depart for the field at 08:45.
- Stop 1 — Audresselle — Evaluation of shoreface sedimentary processes in the Gres de Chatillion and a discussion on the recognition of a sequence boundary in the Gres de la Crèche.
- Stop 2 — Cap Grez Nez — The preservation of foreshore facies in the Gres de la Crèche and a discussion on the paleogeographic significance of a thinned Jurassic succession in this northernmost outcrop.
Lunch — Cap Grez Nez
- Stop 3 — Pointe aux Oies — Evaluation of the uppermost Tithonian and the development of an incised surface in the succession and the transition into non-marine carbonates.
Accommodation: Wimereux
Day 3
Depart for the field at 08:45. Check out of hotel.
- Stop 1 and 2 — Equihen and Le Portel, respectively — An assessment of shoreline sedimentary processes in the Gres de la Crèche. Examples of unusual sedimentary processes will also be described.
Lunch — Wimereux
- Stop 3 — Cran Poulet — an assessment of the development of organic enrichment in the Schistes de Chatillion. Excellent exposures of trace fossils will also be visited and their environmental significance described.
- Stop 4 — Elinghen — Exposures of Lower Carboniferous (Visean) hypersaline, platform carbonates.
The fieldtrip will end at the Eurostar Calais Frethun Station, 14 October before 20:00
Fees
Professionals: US $710 + 20% VAT
Students:US $510 + 20% VAT
Limit: 13 people
Includes: Ground transportation during the trip, accommodations in a 3-star hotel, breakfast (13-14 October), lunch (12-14 October), dinner (12-13 October) and a guidebook.
Notes: Transportation between Frethun Station and London is not included in the cost of this trip.
The weather during the trip is likely to be variable. Wet weather conditions should be expected and prepared for. Temperatures will range between 10–15°C. Therefore, please bring warm clothing suitable for wet weather conditions.
Closed-toed boots with significant ankle support are a requirement for this trip.
Hard hats and high visibility vests will be provided by the leaders. Participants should bring any additional PPE required by their employers.
Venue
