Borehole Seismic Data

 

Science operator: Texas A&M University

Hole: U1463B

Expedition: 356

Location: Northern Carnarvon Basin (Tropical SE Indian Ocean)

Latitude: 18° 57.9190' S

Longitude: 117° 37.4340' E

Logging date: September 15-16, 2015

Sea floor depth (driller's): 156 m DRF

Sea floor depth (logger's): 158 m WRF (FMS/DSI/GPIT/EDTC/HNGS pass 2)

Total penetration:  686 m DRF (530 m DSF)

Total core recovered: 399.10 m (75.3 % of cored section)

Oldest sediment recovered: Late Miocene

Lithology:  Wackestone, packstone, mudstone, rudstone and floatstone. Mudstone, dolostone, sand rich in glauconite and gravel towards the bottom of the hole.

SEISMIC TOOL USED: VSI (Versatile Seismic Imager)

The logging data was recorded by Schlumberger in LDF format. All processing, including first arrival picking and stacking, was performed by Schlumberger during Expedition 356. The data was then converted into SEGY format at USIO/LDEO, using code developed in house. Stacks are generally calculated with at least nine good traces.

In hole U1463B a total of 5 shots (1 station) were recorded at 585 m WRF (427 m WSF). The seismic data were of good quality. No further shots were acquired; VSP operations were interrupted due to mammal sightings.

All the data in the SEGY files are sorted shot by shot (i.e. chronologically).

Additional information about the drilling and logging operations can be found in the Operations and Downhole Measurements sections of the expedition report, Proceedings of the International Ocean Discovery Program, Expedition 356.

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