Laboratory evaluation of in-situ stress contrast in deeply buried sediments

Conference · Fri Jan 01 04:00:00 EST 1982 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:5693135

Abou-Sayed, A S

Delineation of the effects of in situ stress contrasts on fracture containment requires the field measurement of the minimum horizontal in situ stress of the pay zone and adjacent layers. Recently, techniques for the independent determination of p- and s-waves during well-bore logging have been implemented which help establish a more reliable value for the in situ rock elastic properties, namely Young's modulus and Poisson's ratio. Higher Poisson's ratio value has been proposed as an indicator of higher minimum horizontal in situ stresses, but it is inadequate to ascertain which of 2 adjacent formations has the higher horizontal stress, especially in tight reservoirs. In the absence of direct, field-measured in situ stress data, special laboratory tests are aimed at providing the mechanical properties of the rock layers under 2 deformation histories: (1) triaxial compression tests to determine the elastic moduli of rocks, and (2) uniaxial strain tests to delineate the long-term correlation between horizontal and vertical stresses within the various layers. Several case studies show close agreements where laboratory-deduced stress contrasts are compared to field-measured data. 13 references.

• OSTI ID: 5693135
• Report Number(s): CONF-820927-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE-11069
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
BENCH-SCALE EXPERIMENTS
CORRELATIONS
ELASTICITY
FIELD TESTS
GEOPHYSICAL SURVEYS
MATERIALS TESTING
MECHANICAL PROPERTIES
PERMEABILITY
POISSON RATIO
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SEISMIC SURVEYS
STRESS ANALYSIS
SURVEYS
TENSILE PROPERTIES
TESTING
YOUNG MODULUS