From Field Data to Reservoir Model: Turbidite Systems of the Ainsa Basin, Spain

The Ainsa Basin in the Spanish Pyrenees provides the setting for this combined field trip and reservoir modelling course, which focuses on the superb outcrops of one of eight turbidite systems in the basin. Widely recognised as an 'average' deep water system, the area makes for an excellent analogue for turbidite reservoirs worldwide. Various scales of heterogeneity are investigated and participants transfer their field knowledge directly into practical application, by building 3D models of the turbidite systems in Irap RMS.

Summary
The Ainsa turbidite sytem, 300m thick and 8km in width and length, offers an excellent location in which to examine the full variety of sediments found in a turbiditic reservoir. The three cycles of channel-complex development & abandonment display a variety of channel fills, thinbed elements and muddy slumps which are analysed at different scales and set in context of a hydrocarbon reservoir, with the implications for fluid flow. Participants spend mornings in the field and return to the lab in the afternoon to transfer what they have learned into several 3D models using Irap RMS. The base for the course is the beautiful medieval village of Ainsa, allowing participants to benefit from the historic monuments and excellent local cuisine, in addition to the outstanding geology!

Instructors: Pau Arbues (University of Barcelona) & (Roxar)

The course will enable participants to:

Understand the origin and architecture of deep water turbidite sediments
Assess levels of heterogeneity and their effect on fluid flow
Establish the correct scale at which to build a reservoir model
Incorporate analogue and field data into a reservoir model
Appreciate the effect of 3D model construction on the simulation model
Model turbidite reservoirs with a best practice approach


	The Ainsa Quarry outcrop, showing vertically stacked channel-fill sequences

Intended for : Any member of an asset team working with turbidite reservoirs and those wishing to broaden their skill level in reservoir characterisation and tie field scale geology to the 3D model.

Duration : 5 days Pre-requisite : None

Course Schedule
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Day1	Introduction - overview & objectives Field stop: Regional basin setting - structure and general architecture and insight into the several stacked turbidite systems of the area Field stop: External geometry and general architecture of the Ainsa turbidite system. Channel-complexes, thinbed elements, mass-transport complexes, and their bounding surfaces. Link to potential reservoir compartments Outcrop exercise based on synthetic seismic profiles and pseudowells
Day 2	Modelling the general architecture of the Ainsa turbidite system using Irap RMS Structural model Turbidite modelling using Facies:Belts, conditioned to outcrop data and trend surfaces Modelling sedimentary bodies
Day 3	Field stop: architecture of channel complexes and channel margins, types of channel-fills, channel shapes (2D-3D), contrasting architectural styles, evolution, and heterogeneity Outcrop exercise based on stratigraphic logs, natural gamma-ray logs, and photomosaics Modelling intermediate scales of outcrop data in Irap RMS: -Dealing with channel margins: grid design, interfingering, Conditioned vs. not-conditioned. - Importance of reproducing interfingering from a flow response perspective - Methods for reproducing the internal architecture of channel-complexes
Day 4	Field stop: Channel fills - detailed architecture & heterogeneity Exercise based on stratigraphic sections and photomosaics Object-based facies modeling of channel-fill deposits (in RMS). Using outcrop data (hard and soft data) Summary session

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Reservoir Training

From Field Data to Reservoir Model: Turbidite Systems of the Ainsa Basin, Spain

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