In situ wettability determination improves formation evalution
- Louisiana State Univ., Baton Rouge, LA (US)
Wettability is an important petrophysic parameter which affects capillary pressure, relative permeability, electric properties, water cut production, waterflood behavior, and enhanced recovery. This article describes in situ wettability laboratory experiments and field studies. A laboratory model has been built with a 12-ft long 4-in. clear plastic pipe. A 1 7/8-in. slotted plastic liner has been placed on one side. Ottawa sand F-95 has been packed in the annulus either nontreated, in its naturally water wet condition, or after a silane treatment to render it oil wet. Provided in the sand pack for measurement are 12 pressure pickups with an accurate Omega digital pressure gage. A typical pressure profile recorded during oil drive in a water saturated water wet sand pack is shown. The front was left to stabilize for 60 days. A pressure profile recorded during a water drive in an oil saturated oil wet sand pack is shown. The abrupt change from the water pressure gradient can be seen clearly for the water wet and the oil wet sand. It occurs exactly as expected. The measurements show that the change occurs in less than 4 in. which is the distance between two pressure pickups.
- OSTI ID:
- 7156149
- Journal Information:
- Petroleum Engineer International; (USA), Vol. 61:8; ISSN 0031-6466
- Country of Publication:
- United States
- Language:
- English
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Evaluating the Influence of Pore Architecture and Initial Saturation on Wettability and Relative Permeability in Heterogeneous, Shallow-Shelf Carbonates
In situ wettability determination improves formation evaluation
Related Subjects
OIL SANDS
WETTABILITY
OIL WELLS
WATERFLOODING
PETROLEUM
ENHANCED RECOVERY
DISPLACEMENT FLUIDS
FIELD TESTS
OIL SATURATION
PERMEABILITY
RESERVOIR PRESSURE
SCALE MODELS
BITUMINOUS MATERIALS
CARBONACEOUS MATERIALS
ENERGY SOURCES
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
MATERIALS
RECOVERY
SATURATION
STRUCTURAL MODELS
TESTING
WELLS
020300* - Petroleum- Drilling & Production
020200 - Petroleum- Reserves
Geology
& Exploration