Proven squeeze cementing technique in a dolomite reservoir
Early in the installation of secondary recovery in a Grayburg-San Andres reservoir of W. Texas, it became apparent through injectivity profiles that many of the primary cement jobs on the injection wells needed repair. Because of reservoir characteristics, such as thick pay with low porosity and permeability as well as vertical fracturing and the desire to prevent premature dehydration of the slurry at the perforations, it was necessary to design a unique cementing system and technique. The cement slurry consists of an accelerated first stage (approx. 1/6 of the total volume of cement) and a second stage which contains a small percentage of additive to control fluid loss and sand to function as a bridging agent. In a number of the wells which were blanket perforated, it was necessary that the bottom perforations be squeezed. In these cases, the squeeze technique consisted of setting a retainer between sets of perforations and pumping water down the annulus at a low rate into the top sets to keep these open while squeezing the lower sets. To date, 46 water injection wells have been squeezed with an 82% success ratio.
- Research Organization:
- Gulf Oil Corp
- OSTI ID:
- 5374945
- Report Number(s):
- CONF-690997-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Vol. SPE2473; Conference: 44. annual fall meeting of the Society of Petroleum Engineers of AIME, Denver, CO, USA, 28 Sep 1969
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
INJECTION WELLS
PLUGGING
SAND CONSOLIDATION
OIL WELLS
WATERFLOODING
TEXAS
ADDITIVES
CEMENTS
DOLOMITE
ENHANCED RECOVERY
PERFORATION
PERMEABILITY
POROSITY
RESERVOIR ROCK
SAND
SLURRIES
WELL COMPLETION
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
DISPERSIONS
FEDERAL REGION VI
FLUID INJECTION
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATERIALS
MINERALS
MIXTURES
NORTH AMERICA
OXYGEN COMPOUNDS
RECOVERY
SUSPENSIONS
USA
WELLS
020300* - Petroleum- Drilling & Production