Method of installing a sensor in a well
AssigneeSchlumberger Technology Corporation
InventorsSandeep Sharma, John Godsman, Eric Larson, Pat Foale
Life of this patent
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Abstract
Coiled tubing (120) is used to drill into a subsurface formation and provide a conduit back to the surface to allow sensors (200) to be deployed and measurements made for monitoring of the formation. A method of monitoring subsurface formation properties between injection and production wells comprises using coiled tubing (120) to drill sensor holes at predetermined positions between the injection and production wells and fixing the coiled tubing permanently in the hole such that a sensor (200) can be deployed in the tubing to provide measurements of the formation.
Claims20
A method of monitoring subsurface formation properties between injection and production wells, comprising:
- (i) drilling during secondary recovery a borehole (300) into the underground formation at a predetermined position between the injection and production wells using a coiled tubing apparatus;
- and
- (ii) completing the borehole so as to retain a coiled tubing therein to provide a conduit for positioning a sensor (310) in the formation and providing communication from the sensor to the surface,
- wherein the steps of drilling and completing a borehole are performed at more than one location between the injection and production wells.
A method of monitoring the development over time of subsurface formations properties between injection and production wells comprising:
- (i) drilling during secondary recovery a borehole in the subsurface formation in an expected region of development of the properties using a coiled tubing drilling apparatus;
- and
- (ii) completing the borehole so as to retain a coiled tubing therein to provide a conduit for positioning a sensor in the formation to measure the properties and providing communication from the sensor to the surface,
- wherein the steps of drilling and completing a borehole are performed (at more than one location between the injection and production wells.
A method of monitoring subsurface properties between injection and production wells, comprising:
- (i) drilling a borehole into the underground formation at a predetermined position between injection and projection wells using a coiled tubing drilling apparatus;
- (ii) completing the borehole as to retain a coiled tubing therein to provide a conduit for positioning a sensor in the formation and providing communication from the sensor to the surface, wherein said sensor is a continuous fibre optic sensor, and
- (iii) deploying sensor into coiled tubing in the borehole, making a measurement, and retracting sensor from the borehole to the surface,
- wherein the steps of drilling and completing a borehole and deploying a sensor are performed at more than location between the injection and production wells.
Dependencies are inferred from the claim text.