Semi-analytic subsidence prediction
conference paper
Subsidence of the surface due to the extraction of gas or oil from hydrocarbon reservoirs can in some cases be considerable. Two places where this is a problem are the Groningen field in The Netherlands and the Ekofisk field offshore Norway. Two approaches have traditionally been used to calculate subsidence: analytical and numerical. This paper presents a semi-analytical method, which has broader applicability than analytical models while calculation times remain very short. This new method can be applied for a multilayer subsurface in which the elastic properties vary per layer. It performed excellently in a validation exercise against analytical and numerical approaches. Further, the flexibility of the method was demonstrated using a field case. The new approach does not yet incorporate the viscoelastic behaviour of salt layers; this is scheduled for the near future.
TNO Identifier
280332
ISSN
14601419
Source title
Twenty-Third International Conference on the Boundary Element Method, BEM XXIII, 7-9 May 2001, Lemnos
Editor(s)
Beskos D.E.
Brebbia C.A.
Katsikadelis J.T.
Manolis G.D.
Brebbia C.A.
Katsikadelis J.T.
Manolis G.D.
Pages
117-126
Files
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