The registration witness has a job that encompasses a number of responsibilities:
- Coordination of all well related logging activities: before work, during work and after work
- Training of any new utility records engineer on specific customer requirements
- Interact with the Logging Engineer, Operations Geologist, Well Engineer and Drilling Superintendents
- Pre-job, during-job, and post-job reporting of logging targets and operations
- Participation and supervision of wireline logging operations on the platform
Once the utility company is informed of the upcoming job and a logging crew is selected, a wire witness is also appointed to cover the job. The witness log is sent to the wireline logging program and reported back by the operating company’s operations geologist or well engineer.
The logging witness is considered the leader of the logging service project team consisting of the utility’s logging engineer, his crew, and drilling superintendents on the rig. Aboard the rig, initial interactions between the logging witness, drilling superintendents and logging engineer should take place, obtaining consent on the following topics:
- Logging program and objectives
- What tools are required and what tools are available
- Review and discuss risk assessments and potential security issues.
- Preliminary details of the registration plan, including the expected start date and time
- Lessons learned from previous wells
The registration team needs to check all of your equipment to ensure that all registration tools are in working condition and that no equipment necessary for the job is missing. The logging engineer is to report any missing tool or equipment issues to the cable witness and drilling superintendents on the rig. At this point, the registration program could be refined through discussions between the operating company and the utility company with the registration witness taking on an advisory role. Logging time estimates, log submissions, and pre-job information sheets are also prepared before work begins. Any discretion in forecasting the estimated logging time should be brought to the attention of the drilling superintendent to assist in advance planning and logistics. When the job begins, the landline witness has responsibilities that include:
- Acquisition of data from timber companies: supervision and quality control
- Formatting and/or reformatting of data
- Supervision of Downhole Sample Measurements: Training in Testing and Coring
- Daily work reports
- Continuous evaluation of occupational risks