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Published December 1980 | public
Journal Article

Finite element simulation of Wilmington oil field subsidence: II. Nonlinear modelling


The numerical modelling of the first part of this work is extended to include a nonlinear elastic—plastic material response. The parameters for the rheological model are deduced from published soil tests and from the behavior of the field during the rebound phase which is assumed to be purely elastic. Unlike the linear case, the response of the plastic model is highly dependent on the stresses in the field prior to production. When these stresses are purely lithostatic and horizontally uniform the fit to observations is not significantly improved over the linear models. When a flexural prestress which accounts for the formation of the structural anticline of the field is included, simulations explain observations quite well.

Additional Information

© 1980 Elsevier Scientific Publishing Company. Received December 31, 1979; revised version accepted April 28, 1980. The authors wish to thank D. Allen for numerous helpful discussions and for assisting in compiling the data. They are grateful to the City of Long Beach for funding this investigation.

Additional details

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