Simulating Interference Effect Between Reinjection Wells

Abstract

Ensuring the performance of reinjection wells is important for the sustainability of geothermal field management. One of the problems that is rarely noticed in the reinjection performance is the interference-effect. The interference-effect could cause a significant drop in injection well capacity.
Two reinjection wells were suspected of having interconnected fracture permeability and bounded reservoir. Although the distance between the feed zone is more than 300 meters, Well D-2 experienced a temperature drop and pressure increase during the Injectivity Test of Well D-3. A method to estimate optimum total reinjection capacity is delivered.
The approach is using the nodal analysis to obtain each wells` reinjection capacity. Then, analytical and semi-numerical transient models are used to obtain reservoir properties also to simulate the optimum reinjection capacity due to the interference-effect.