The well was successfully killed with 10.5 ppg brine which exhibited 72 percent drag reduction in surface lines and drill pipe at an injection rate of 60 bbl/min. Further analysis of the hydraulics of the system suggested two alternatives for dynamically killing the well: the use of highly drag-reduced fluids of moderate density such as water or brine, and the use of non-drag-reduced mud with a density greater than about 18 ppg. The high CO/sub more » 2/ flow rate efficiently gas-lifted the kill fluid up the annulus and thus tended to maintain a low bottomhole pressure. The kill operation was further complicated by the high flow capacity of CO/sub 2/ from the reservoir. Injection of kill fluid down the drill pipe was possible, but the small pipe diameter, particularly that of the heavy wall drill pipe, significantly limited the rate of kill fluid injection. Analyses of wellbore and reservoir hydraulics led to an understanding of the freely flowing well. This well was brought under control in early April 1982 by the dynamic injection of drag-reduced brine followed by mud. In March 1982 a carbon-dioxide well in the Sheep Mountain Unit, Colorado, blew out. Both techniques show an initial sealing stage related to calcium carbonate precipitation plugging the porosity, followed by a dissolution stage marked by a significant increase of porosity. The bulk porosity evolution, as well as local porosity gradients through the samples, is quantified using combined mercury porosimetry and back-scattered electron image analysis. The degraded cement exhibits significant mineralogical changes and heterogeneous porosity distribution. ![]() (United States) Additional Journal Information: Journal Volume: SPE12752 Conference: Society of Petroleum Engineers California regional meeting, Long Beach, CA, USA, Country of Publication: United States Language: English Subject: 02 PETROLEUM OIL WELLS CARBON DIOXIDE INJECTION SCALE CONTROL ANTIFOULANTS AQUEOUS SOLUTIONS CALCIUM CARBONATES CALCIUM CHLORIDES CARBON DIOXIDE ENHANCED RECOVERY PARTIAL PRESSURE PRECIPITATION PRESSURE EFFECTS PRESSURIZING SCALING WELL PRESSURE ALKALINE EARTH METAL COMPOUNDS CALCIUM COMPOUNDS CALCIUM HALIDES CARBON COMPOUNDS CARBON OXIDES CARBONATES CHALCOGENIDES CHLORIDES CHLORINE COMPOUNDS CONTROL DISPERSIONS FLUID INJECTION HALIDES HALOGEN COMPOUNDS MISCIBLE-PHASE DISPLACEMENT MIXTURES OXIDES OXYGEN COMPOUNDS RECOVERY RESERVOIR PRESSURE SEPARATION PROCESSES SOLUTIONS WELLS 020300* - Petroleum- Drilling & ProductionĮfficient and safe storage of injected supercritical carbon dioxide (CO fluids under pressure and temperature to simulate downhole more » conditions. OSTI Identifier: 6640394 Report Number(s): CONF-840495- Journal ID: CODEN: SEAPA Resource Type: Conference Journal Name: Soc. Authors: Kapelke, M S Caballero, E P Publication Date: Research Org.: Champlin Petroleum Co.
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