Method predicts brine crystallization temperatures

Daniel P. VollmerBJ Services Co., Lafayette, La.A new method calculates brine crystallization temperatures at elevated pressure based on the true crystallization temperature and the brine composition. The method predicts temperature within 3° F. of the measured value.Brine density and true crystallization temperature (TCT) determine the selling price of completion brines. In general, cost increases with density and decreasing true crystallization temperature.Pressure effectsThe pressure effects of crystallization temperature became a concern at Shell Exploration & Production Co.'s Ram/Powell tension-leg platform when a 30° F. completion brine crystallized.1 Subsequent tests ...

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