The effects of residual oil saturations on the interpretation of water productive vs. oil productive Delaware sandstones

Conference · Tue Mar 01 04:00:00 EST 1994 · AAPG Bulletin (American Association of Petroleum Geologists); (United States)

OSTI ID:7120123

Thomerson, M D; Asquith, G B ^[1]

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1. Texas Tech Univ., Lubbock, TX (United States)

Delaware sandstones in west Texas and southeast New Mexico that have excellent hydrocarbon shows and calculated water saturations of 60% or less sometimes produce only water. The problem with these silt- to very fine-grained reservoirs is whether the hydrocarbons in these reservoirs are moveable. Using net pay cutoffs of Vcl<15%, effective porosity >15% and Archie water saturation <60%, Bell Canyon and Brushy Canyon example zones contained 18 ft and 22 ft of net pay, respectively. However, when these two zones were tested, the Bell Canyon zone produced only water and the Brushy Canyon zone produced 125 bbl of oil/day and some water. A series of cross plots that include (1) shallow resistivity porosity vs. deep resistivity porosity, (2) Archie water saturation vs. ratio water saturation, and (3) Rxo/Rmf vs. Rt/Rw (Dew Plot) were used to differentiate moveable and residual oil. On all three cross plots, the Bell Canyon example exhibited a higher proportion of moveable oil. Thus, with the use of these cross plots, the oil productive vs. water productive Delaware oil-bearing sandstones were differentiated by determining what proportion of the oil was moveable.

• OSTI ID: 7120123
• Report Number(s): CONF-9404148--
• Conference Information: Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Journal Volume: 78:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
&amp; Exploration
CONCENTRATION RATIO
DEVELOPED COUNTRIES
ENERGY SOURCES
EXPLORATORY WELLS
FLUIDS
FORECASTING
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GROUND WATER
HYDROCARBONS
HYDROGEN COMPOUNDS
MINERAL RESOURCES
NEW MEXICO
NORTH AMERICA
OIL SATURATION
OIL WELLS
OIL YIELDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DEPOSITS
POROSITY
PRIMARY RECOVERY
PRODUCTIVITY
RESERVOIR FLUIDS
RESERVOIR ROCK
RESIDUAL PETROLEUM
RESOURCES
ROCKS
SANDSTONES
SATURATION
SEDIMENTARY ROCKS
TEXAS
USA
WATER
WATER SATURATION
WELLS
YIELDS