Effect of salt composition on clay release in Berea sandstones

Journal Article · Sun Nov 01 04:00:00 EST 1987 · SPE (Society of Petroleum Engineers) Product. Eng.; (United States)

DOI:https://doi.org/10.2118/16254-MS· OSTI ID:5756058

Kia, S F; Fogler, H S; Reed, M G; Vaidya, R N

The effect of salt composition of fluid injected into clay-bearing Berea sandstones on the water-sensitivity phenomenon has been studied. Experiments were carried out with solutions of sodium and/or calcium ions, which are the ions commonly found in the formation. Freshwater flooding of sandstones previously exposed to sodium salt solutions results in the release of clay particles and a drastic reduction in permeability. The permeability reduction is lessened, however, when calcium ions are also present in the salt solution. Formation damage is virtually eliminated when the solution composition is adjusted to give calcium surface coverages greater than a critical value of 75%. The effect of the fluid composition on the damage process is explained by the double-layer interactions between the surface of the clay particles and the pore walls.

• Research Organization: General Motors Research Labs.
• OSTI ID: 5756058
• Journal Information: SPE (Society of Petroleum Engineers) Product. Eng.; (United States), Journal Name: SPE (Society of Petroleum Engineers) Product. Eng.; (United States) Vol. 2:4; ISSN SPENE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CHEMICAL COMPOSITION
CLAYS
DISPLACEMENT FLUIDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUID MECHANICS
FLUIDS
FORMATION DAMAGE
FOSSIL FUELS
FUELS
HYDRODYNAMICS
MECHANICS
OIL WELLS
PETROLEUM
RECOVERY
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
STIMULATION
WATERFLOODING
WELL STIMULATION
WELLS