CAPROCK BREACH DETERMINATION TECHNIQUE

摘要

A technique for determination of out of zone injection. The technique may include taking temperature readings of the well at locations adjacent the cap rock during injection of injection fluid into the injection well at temperatures that are below that of the cap rock. Analysis of the rate of change in temperatures adjacent the cap rock may be used to monitoring effects of the injection application including deciphering cap rock breach of injection fluid when the rate of change substantial enough.

主权项

1. A method of determining out of zone injection of a fluid from an injection well and into cap rock over a reservoir at an oilfield, the method comprising:
positioning a sensor device in the injection well adjacent the cap rock; recording an initial temperature of the sensor device corresponding to the cap rock; injecting the fluid into the injection well at a temperature different from that of the cap rock; monitoring the sensor device for a change in temperature at an anomalous rate corresponding to out of zone injection of the fluid into the cap rock.