Community Research and Development Information Service - CORDIS

  • European Commission
  • CORDIS
  • Publications
  • Mechanical Behaviour of Partially and Multiphase Saturated CHALKs Fluid-skeleton Interaction: Main Factor of Chalk Oil Reservoirs Compaction and Related Subsidence - Part 2
FP5

Mechanical Behaviour of Partially and Multiphase Saturated CHALKs Fluid-skeleton Interaction: Main Factor of Chalk Oil Reservoirs Compaction and Related Subsidence - Part 2

Project ID: ENK6-CT-2000-00089
Funded under: FP5-EESD

Abstract

The "Pasachalk" project, started in 1997 with the Pasachalk "1" EC contract and continued with the present "Pasachakl 2" with partners from the universities (Université de Liège - Department GeomaC - geomechanics and Ecole Nationale des Ponts et Chaussées - CERMES) and from Industry (Total Exploration Norway).
These projects were initiated in the framework of the set of problems of the North Sea chalky oil fields, especially in the huge Ekofisk field. In this field, oil is located in a 300 m thick layer of porous chalk (n = 40-50%) at a 3000 m depth. After the depletion phase, which lead to about 6 m of compaction of the reservoir and 4 m of subsidence of the sea floor, an enhanced oil recovery procedure has been carried out by injecting sea water (waterflooding). An unexpected consequence of this waterflooding has been the occurrence of an additional seafloor subsidence, corresponding in 2000 to a decrease of the seafloor level of approximately 10 m.

Download application/pdf (2234604)

Record Number: 6899 / Last updated on: 2005-06-28
Category: PROJ
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top