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Cascade3 field trial completed successfully in high rate water injection well

Cascade3 completion shows effective backflow prevention without impeding water injection.

 

In collaboration with a major operator, Tendeka has developed and qualified a completion solution to prevent water injection failure due to solids fill in sand prone reservoirs. A field trial was performed to confirm the performance of the technology in a live injection well.

The Challenge

Multiple Gulf of Mexico operators have experienced problems with their deepwater injector wells in recent years. Loss of  injectivity has required expensive remedial efforts, and even sidetracking or re-drilling of injectors.

The problem was identified as an accumulation of formation solids inside the lower completion; principally fine matrix sand. These solids can be mobilised during shut-ins (maintenance, pump problems, environmental conditions etc.) due to transient flow effects such as backflow, crossflow and even water hammer. Eventually, enough solid fill can accumulate inside the lower completion to diminish the injection rates.

Tendeka Solution
Two Cascade3 joints with a total injection capacity of 25,000bpd were deployed in the completion of a Salt Water Disposal (SWD) well in the Permian.

The completion was configured with a nipple profile below and sliding sleeve above. The nipple profile was used to install memory gauges capable of high frequency data acquisition to read the tubing and annulus pressures simultaneously. The sliding sleeve was used to bypass the Cascade3 system to create a baseline.

The primary objectives of the test were to:

1. Confirm the non-return valve functionality in field
application.
2. Confirm that the Cascade3 does not impact normal
injection operations.
3. Evaluate the effect of the Cascade3 system on water
hammer.

thumbnail of Cascade3 Permian Case Study