Wireline Standard Data Processing

ODP logging contractor: LDEO-BRG

Well name: 720A

Leg: 117

Location: Indus Fan (tropical NW Indian)

Latitude: 16° 7.796' N

Longitude: 60° 44..621' E

Logging date: September, 1987

Bottom felt: 4045.4 mbrf (used for depth shift to sea floor)

Total penetration: 414.3 mbsf

Total core recovered: 89.4 m (21.6 %)

Logging Runs

Logging string 1: DIT/SDT/NGT (upper and lower section)

         No wireline heave compensator was used to counter ship heave.

Bottom-hole Assembly

         The logs were recorded open hole.

Processing

         Depth shift: No differential depth shift necessary. The original logs have been depth shifted to the sea floor (- 4045.4 m).

         Gamma-ray processing: NGT data have been processed to correct for borehole size and type of drilling fluid.

         Acoustic data processing: Because of the good quality of the acoustic logs no processing has been necessary.

Quality Control

         Null value=-999.25. This value may replace recorded log values or results which are considered invalid .

         During the processing, quality control of the data is mainly performed by cross-correlation of all logging data. The data of hole 720A are of good quality.

         No hole diameter was recorded.

         Additional information about the logs can be found in the "Explanatory Notes" and Site Chapter, ODP IR volume 117.

For any question about the data or about the LogDB database, please contact LogDB support: logdb@ldeo.columbia.edu.