Toe-to-heel oil recovery process

Details Toe-to-heel oil recovery process Toe-to-heel oil recovery process

E - Fixed Constructions

21

B

E21B 43/25 (2006.01) E21B 43/16 (2006.01) E21B 43/20 (2006.01) E21B 43/30 (2006.01)

Patent

CA 2246461

In an underground ail reservoir, an injection well is completed low in the reservoir and a production well is provided having a horizontal leg completed relatively high in the reservoir and a vertical leg completed low in the reservoir. Water is injected with the vertical leg open and the horizontal leg closed, so that a displacement front advances in an under-riding manner between the wells and oil is produced through the vertical leg. Once the water break-through in the vertical leg occurs, it is closed and the horizontal leg is opened. A rising, horizontal, gravity-stable displacement front then advances upwardly toward the horizontal leg, through which oil is produced. The open horizontal leg acts as a low pressure sink to induce the horizontal displacement front to advance up toward it. This two-stage process is characterized by a good vertical and lateral sweep. In a slightly modified version, water is injected with the vertical leg closed and the horizontal leg open so that a gravity-stable displacement front advances both laterally and vertically with a relatively upright position of a displacement front. In this version (one stage process) the process is also characterized by a good vertical and lateral sweep.

Affiliated with

Also associated with

Rating

Toe-to-heel oil recovery process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Toe-to-heel oil recovery process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Toe-to-heel oil recovery process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1376379