THE PROGNOSIS OF CLOGGING PROCESSES IN INJECTION WELLS DURING PUMPING COOLED THERMAL WATERS
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2013, Vol 456, Issue 456
Abstract
When identifying the conditions required for the sustainable and long-term exploitation of geothermal resources, it is very important to assess the dynamics of processes linked to the formation, migration and deposition of particles in geothermal systems. Such particles often cause clogging and damage to the boreholes and source reservoirs. The paper proposes a mathematical model for changes in the absorbance index and the water injection pressure required over time. It was determined from the operating conditions for a model system consisting of a doublet of geothermal wells (extraction and injection well) and the water from Lower Jurassic sandstone structures in the Polish Lowland. It has been demonstrated that clogging of the active zone causes a particularly high surge in injection pressure during the first 24 hours of pumping. These estimated results have been confirmed in practice by real-life investigation of an injection well.
Authors and Affiliations
Barbara TOMASZEWSKA, Leszek PAJĄK, Bogusław BIELEC
Keywords
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- EP ID EP63873
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