Table T1. Summary of LWD/MWD data and drilling parameters acquired in Hole C0012H.
| Data | Raw | Processed | Processed by | Depth reference | Logs included | Data included | Available formats |
|---|---|---|---|---|---|---|---|
| Real time | x | Raw: DRF | Main | Gamma ray; shallow, medium, and deep button resistivity; compressional slowness; rate of penetration; downhole annular pressure; downhole annular temperature; downhole weight on bit; downhole torque; surface weight on bit; equivalent circulating density | DLIS, LAS, PDF | ||
| Memory data | x | x | LSS | Raw: DRF Processed: LSF (mbsf) | Main | Gamma ray; bit resistivity; ring resistivity; shallow, medium, and deep button resistivity; rate of penetration; rotational speed; collar rotational speed; downhole annular pressure; downhole annular temperature; downhole weight on bit; downhole torque; surface weight on bit; equivalent circulating density; equivalent static density; minimum and maximum static density; standpipe pressure; stick ratio | DLIS, LAS, PDF |
| Time | x | x | LSS | Time | Main | Borehole and bit depth; gamma ray; rate of penetration; rotational speed; collar rotational speed; downhole annular pressure; downhole annular temperature; downhole weight on bit; downhole torque; surface weight on bit; surface torque; equivalent circulating density; equivalent static density; minimum and maximum static density; standpipe pressure; stick ratio; axial, tool, and radial show level; Pump 1, 2, and 3 stroke rates; total stroke rate for all pumps; total flow rate of all active pumps; average hook load; status of the slips (in or out); status of the drill bit (on bottom); composite on bottom status | DLIS, LAS |
| Image logs | x | LSS | LSF (mbsf) | Main | Shallow, medium, and deep resistivity image logs with static normalization | DLIS, LAS, PDF | |
| Sonic | x | SLB onshore | LSF (mbsf) | Main | Compressional slowness, compressional velocity | DLIS, LAS, PDF, SEGY | |
| IMS data | x | x | LSS | Time: every 10 s interval Depth: DRF and LSF (mbsf) | Total depth, bit depth, rate of penetration, hook position, compensator position, hook load, weight on bit, power swivel torque, power swivel speed, standpipe manifold A pressure, standpipe manifold B pressure, mud Pump 1, mud Pump 2, mud Pump 3, mud Pump 4, active SPM, flow-in, mud return flow, total volume, gain/loss | CSV, TEXT |
IMS = Information Management System on the Chikyu. LSS = logging staff scientist, SLB = Schlumberger. SPM = strokes per minute. DLIS = digital log information standard, LAS = log ASCII standard, SEGY = Society of Exploration Geophysicists format “Y”, CSV = comma separated value.
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