Abstract
Reinjection is key to maintaining and managing geothermal resources during utilization. This study presents an updated review of the worldwide reinjection experience in geothermal fields. Data from 152 geothermal fields from around the world were used to investigate the impact of reinjection location, reinjection depth, distance from production wells, reinjection fluid temperature, and the amount of reinjection fluid. Positive and detrimental effects on the relevant reservoirs were assessed. Changes in reinjection strategies in response to production and the lessons learned from reinjection experiences in various fields are also discussed. This updated review demonstrates the importance of understanding the type of geothermal system before starting reinjection. Main challenges to successful reinjection are also reviewed along with possible solutions with particular emphasis on pressure support, cooling mitigation, injectivity, scaling and solid deposition, microearthquake and tracer testing.
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