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The role of the ODP Logging Staff Scientist encompasses a number of responsibilities:
- Coordination of all leg-related logging activities - pre-cruise, cruise, and post-cruise
- Training of any new logging scientists sailing on the cruise
- Interfacing with the Co-Chief Scientists, TAMU Staff Scientist, and the Operations and Drilling Superintendents
- Pre-cruise, cruise, and post-cruise reporting of logging objectives and operations
- Participation in and supervision of at-sea logging operations
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Logging scientists aboard ODP Leg 188
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Shortly after the drillship schedule has been set by SCICOM at the August meeting, ODP Logging Services appoints a Logging Staff Scientist for each scheduled leg. Following the appointment, the Logging Staff Scientist will contact the Co-Chief Scientists (when named) and the TAMU Staff Scientist to introduce himself and explain his role on the drilling leg.
The Logging Staff Scientist is considered to be the leader of the Logging Services project team. In addition to any people sailing, the team usually consists of:
- Manager of Technical Services (Greg Myers) for tool deployment and engineering issues
- Engineering Assistant (Walt Masterson) for shipping issues
- Manager of Information Services (Cristina Broglia) for data handling issues
- Log Analysts (Trevor Williams and Caroline Philippot) for log processing services
- CD-ROM coordinator (Jim Murray) for issues involving the Log Data CD
- Systems Analyst (Ted Baker) for any computer or software issues
In addition, there may be other engineering or scientific personnel involved if special projects are planned for the cruise. The Deputy Director of Operations (Mary Reagan) is responsible for coordinating the activities of the leg project managers. She and the Director (Dave Goldberg) are available to assist as needed.
Following the initial consultations between the Logging Staff Scientist, the Co-Chief Scientists and the TAMU Staff Scientist, there should be general agreement on the following issues:
- At what sites logging is required.
- The general science plan for the leg.
- What tools are funded for the leg.
- The preliminary details of the logging plan.
At this point, the science and logging plans undergo refinement through numerous discussions with LDEO-BRG, TAMU, Schlumberger and the Co-Chief Scientists. Meanwhile, the Logging Staff Scientist, in consultation with the Logging Services project team, prepares a logging presentation for the pre-cruise meeting. It is at the pre-cruise meeting that the involved parties discuss every detail of the leg and the time allocation for each drill site. The Logging Staff Scientist represents the ODP logging program; therefore she will describe the available toolstrings and the integration of the logging plan with the overall science plan. The result of the pre-cruise meeting is the creation of a comprehensive Scientific Prospectus which serves as the operational guide for the leg.
Prior to the pre-cruise meeting the Logging Staff Scientist will:
- Contact the members of the Logging Services project team to begin acquiring specific information about the leg.
- Contact the Co-Chief Scientists, once named, to review the current plan.
- Be apprised of tool condition and availability and toolstring deployment details specific to the leg. Greg Myers serves as the liaison between ODP Logging Services and Schlumberger.
- Generate logging time estimates using the estimation spreadsheets.
- Prepare a logging template for the leg.
- Prepare a short presentation with overheads on the tools to be deployed and the respective time requirements.
The other shipboard participant with whom the Logging Staff Scientist has extensive contact is the JOIDES Logging Scientist. This position is selected by the co-chiefs. The person who is selected may or may not have had previous logging experience. ODP Logging Services offers to provide pre-cruise training to any JOIDES logger who wants it; an invitation is issued by the Deputy Director of Operations. The Logging Staff Scientist will contact the JOIDES Logger before the cruise to discussed planned operations, shipboard responsibilities and post-cruise research interests.
The division of responsibilities between the Logging Staff Scientist and JOIDES Logger is quite flexible, and is usually worked out between the individuals involved on a leg-by-leg basis. A general summary of the respective responsibilities is given below. The rule of thumb is that the Logging Staff Scientist is responsible for data acquisition (with both Schlumberger standard tools and specialty tools) and preliminary processing. Log interpretation responsibilities are shared between the Logging Staff Scientist and JOIDES Logger and should be divided in a mutually agreed-upon manner.
Here is the typical division of responsibilities:
Logging Staff Scientist:
- Schlumberger data acquisition: supervision and quality control
- Specialty tool data acquisition and processing
- Data reformatting
- Systems management
- Downhole Measurements Lab supervision
Shared between Logging Staff Scientist and JOIDES Logger:
- Daily sampling shift
- Authorship of Initial Reports chapters and Scientific Results data/scientific report
- Seismic interpretation linked to core and log data
- Detailed interpretation of specialty logs
- Quantitative mineralogy from logs, and its interpretation
- Interaction with physical properties scientists, sedimentologists, and seismic stratigraphers
- Qualitative interpretation of lithologic units
- Qualitative interpretation of specialty tool data
- Comparison of log and laboratory measurements
- Inter-site correlation via logs
- Generation of synthetic seismograms
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