Formation permeability damage induced by completion brines
- Halliburton Reservoir Services, Dallas, TX (US)
- Shell Offshore Inc., New Orleans, LA (US)
In a laboratory study to determine permeability changes induced by flooding large Berea and Casper sandstone cores with NaCl and KCl brine, the concentration of each brine was incrementally increased from 0 to 22 wt% and then decreased from 22 to 0 wt%. In both sandstones, the permeability to KCl brines increased noticeably with increases in KCl concentration up to 10 wt%. Permeability remained at the higher levels throughout the remainder of each flood until a critically low salinity level was reached, where dispersion of the interstitial fines took place. X-ray diffraction (XRD) analysis of the produced formation fines and scanning electron micrographs of the sandstone pore surfaces indicate that the improved permeability was primarily a result of alteration of illite in the clay minerals in the sandstones.
- OSTI ID:
- 6929804
- Journal Information:
- Journal of Petroleum Technology; (USA), Journal Name: Journal of Petroleum Technology; (USA) Vol. 42:4; ISSN JPTJA; ISSN 0022-3522
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
BRINES
CHLORIDES
CHLORINE COMPOUNDS
CLAYS
COHERENT SCATTERING
DIFFRACTION
DRILL CORES
ELECTRON MICROSCOPY
FORMATION DAMAGE
HALIDES
HALOGEN COMPOUNDS
ILLITE
INJECTION WELLS
MICROSCOPY
OIL WELLS
PERMEABILITY
POTASSIUM CHLORIDES
POTASSIUM COMPOUNDS
ROCKS
SANDSTONES
SCALE MODELS
SCANNING ELECTRON MICROSCOPY
SCATTERING
SEDIMENTARY ROCKS
SODIUM CHLORIDES
SODIUM COMPOUNDS
STRUCTURAL MODELS
WELL COMPLETION
WELLS
X-RAY DIFFRACTION