Open AccessEstimation of constitutive parameters for the Belridge Diatomite, South Belridge Diatomite Field
Author(s) -
A.F. Fossum,
Joanne T. Fredrich
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/656532
Subject(s) - casing , geology , overburden , geotechnical engineering , deformation (meteorology) , geomechanics , oil field , rock mechanics , plasticity , constitutive equation , petroleum engineering , finite element method , engineering , structural engineering , materials science , oceanography , composite material
A cooperative national laboratory/industry research program was initiated in 1994 that improved understanding of the geomechanical processes causing well casing damage during oil production from weak, compactible formations. The program focused on the shallow diatomaceous oil reservoirs located in California`s San Joaquin Valley, and combined analyses of historical field data, experimental determination of rock mechanical behavior, and geomechanical simulation of the reservoir and overburden response to production and injection. Sandia National Laboratories` quasi-static, large-deformation structural mechanics finite element code JAS3D was used to perform the three-dimensional geomechanical simulations. One of the material models implemented in JAS3D to simulate the time-independent inelastic (non-linear) deformation of geomaterials is a generalized version of the Sandler and Rubin cap plasticity model (Sandler and Rubin, 1979). This report documents the experimental rock mechanics data and material cap plasticity models that were derived to describe the Belridge Diatomite reservoir rock at the South Belridge Diatomite Field, Section 33