A nonlinear compaction model for sandstone

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · J. Energy Resour. Technol.; (United States)

DOI:https://doi.org/10.1115/1.3231254· OSTI ID:5303162

Fahrenthold, E P; Gray, K E

Constitutive relations for the compaction behavior of porous sandstone have been formulated to describe the results of uniaxial and triaxial tests under reservoir pressure and temperature conditions. An expression for loading behavior in uniaxial compression is derived by treating the loading modulus as an independent variable. Similar relations are derived for uniaxial and triaxial compaction tests. Elastic unloading takes a quadratic form when described by incremental stresses and strains. The constitutive equations relate the values of the incremental stress and strain on loading and unloading using parameters that are a function of the state of prestress in the material. Published data on samples cored from three different wells at various depths exhibited a similar dependence of rock properties on mechanical and pore pressure loads.

• Research Organization: Dept. of Mechanical Engineering, Univ. of Texas, Austin, TX 78712
• OSTI ID: 5303162
• Journal Information: J. Energy Resour. Technol.; (United States), Journal Name: J. Energy Resour. Technol.; (United States) Vol. 108:2; ISSN JERTD
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
COMPRESSION STRENGTH
DRILL CORES
ELASTICITY
EQUATIONS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MECHANICS
NATURAL GAS WELLS
NONLINEAR PROBLEMS
OIL WELLS
POROSITY
RESERVOIR PRESSURE
RESERVOIR TEMPERATURE
ROCK MECHANICS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STRAINS
STRESSES
TENSILE PROPERTIES
TESTING
WELLS