Computation and interpretation of capillary pressure from a centrifuge

Journal Article · Sun Mar 01 04:00:00 EST 1992 · SPE Formation Evaluation (Society of Petroleum Engineers); (United States)

DOI:https://doi.org/10.2118/18297-PA· OSTI ID:5724369

Skuse, B; Ramey, Jr, H J ^[1]; Firoozabadi, A ^[2]

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1. Stanford Univ. (US)
2. Norsk Hydro A/S (NO)

This paper reports that centrifuge capillary pressure measurements usually are conducted at atmospheric air pressure. In such measurements, any capillary pressure exceeding atmospheric pressure requires a negative pressure in the wetting phase. Experiments were conducted to examine the effect of air pressure on air/brine capillary pressure. First, drainage capillary pressure curves were determined for six low-permeability core samples under atmospheric pressure. Then, drainage capillary pressure curves were determined at an elevated air pressure of 112 psia (0.77 MPa) for the same samples. The two capillary pressure curves for each core sample generally are in close agreement. Both measurements reported in this paper and data from the literature indicate stable behavior for the wetting phase under negative pressure conditions.

• OSTI ID: 5724369
• Journal Information: SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 7:1; ISSN 0885-923X; ISSN SFEVE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
AIR
BRINES
CAPILLARY FLOW
COMPUTER CALCULATIONS
DATA ANALYSIS
DRAINAGE
DRILL CORES
FLUID FLOW
FLUIDS
GASES
PERMEABILITY
PHASE STUDIES
PRESSURE MEASUREMENT
RESERVOIR FLUIDS
RESERVOIR PRESSURE
RESERVOIR ROCK