Resistivity index and capillary pressure hysteresis for rock samples of different wettability characteristics

Conference · Sun Oct 01 04:00:00 EDT 1995

OSTI ID:103857

Elashahab, B M; Jing, X D; Archer, J S ^[1]

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1. Imperial College of Science, Technology and Medicine, London (United Kingdom)

This paper presents the results of an experimental investigation into the effects of hysteresis (saturation history) on resistivity index and capillary pressure characteristics for some sandstone rocks of different wetting character. The drainage and imbibition resistivity index and capillary pressure measurements were carried out at equilibrium conditions using oil and brine with semi-permeable membranes. The displacing-cycle dependent hysteresis was also investigated experimentally. The resistivity profiles along the core length obtained from six potential electrodes enabled the assessment of equilibrium conditions, core and saturations heterogeneity and the end effects. The authors` results indicate that both the displacing-phase and displacing-cycle dependent hysteresis should be taken into consideration for relevant resistivity index and capillary pressure curves. The hysteresis effects were also found to depend on the wettability of the rock samples. A parametric study was presented to highlight quantitatively the petrophysical effects.

• OSTI ID: 103857
• Report Number(s): CONF-950310--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
BENCH-SCALE EXPERIMENTS
DRILL CORES
OIL SATURATION
PETROLEUM DEPOSITS
RESERVOIR ROCK
TESTING
WETTABILITY