Pre-cutting of core
- Check that the inside of the core barrel is clear of manufacturing or any other residue.
- Ensure adequate stock of coring consumables are available, plus cradles, saw etc for laydown
- Hold meeting with geologist, core hand and TP to confirm procedures
- Before dropping the ball insure that there is no restriction in the string. (mud check valve etc)
- Consider increasing the mud weight for coring/ drilling the reservoir. This could reduce the washout, lower gas readings and improve coring performance
Core Recovery / Handling Procedures for recovering and transporting unconsolidated core
- Refer to Wellsite Coring Guideline document
- Have sufficient plastic water bottles available for mud samples
- Ensure rig crew are aware of method to trip core from hole e.g. min rotation, jarring etc
- Prior to laying out of the core, hold informal meeting with key personnel and rig crews to discuss safe, effective handling procedures
- Ensure geologist has all necessary equipment and a suitable area to process the core
- Have crane driver ready to assist laydown and make sure he understands his task
- Get full operational summary from corehand prior to his departure