CORE STABILIZATION: WHY POLYURETHENE FOAM?
The common methods for core stabilization are not recommended by ICS
- Gypsum causes particle invasion which is impossible to remove.
- Epoxy causes difficulty in plugging samples. May not set because of oil.
- Freezing causes microfractures, core expansion, clay damage. Cost of Freezing.
Polyurethene Foam is soft, provides cushion while transportation and is easy to work with.
In addition to being a simple process, substantiantial reduction in cost is achieved.
- Two chemicals are premixed
- Premixed solution is poured down the annulus and the barrel approximately ½ filled
- Foam is created and expands in the annulus and fractures
- After foam reaches the top, the section is capped.
- Setting takes ~25-40 minutes
- The core is chilled (not frozen) to prevent fluid loss and transport.