THE OTTAVIANO EXPLORATORY WELL - EXPLORATION OF THE CARBONATE BASE BELOW THE VOLCANIC SERIES
The well Trecase I was drilled on the slopes of the Vesuvius, within the concession Ottaviano after a feasibility study had indicated the best drilling location. The well reached a depth of 2068 m and passed through successive layers of pyroclastic material tuffs and lava. Conglomerates with pieces of carbonate appeared at depths of 1500 m and dolomites were encountered after 1800 m. The layers were up till 1490 m of continental origin. Deeper they were marine. No traces of hydrothermal alterations have been seen during this drilling, except for the alterations that occured at the first contact of volcanic material with seawater. Several cores have been taken during the drilling. These have been analyzed by X-ray and chemically. The temperature at the bottom of the well is 48.8 degrees C. During the drilling 639 m**3 of drilling mud was lost and the well proved to be non-productive. Since the objective of the drilling, high temperature and salt water steam production, was not reached it was decided to cement the hole. The absence of a cap rock is very likely the reason for these results.
Bibliographic Reference: EUR 8788 IT (1983) MF, 54 P., BFR 120, EUROFFICE, LUXEMBOURG, POB 1907
Availability: Can be ordered online
Record Number: 1989122010500 / Last updated on: 1987-01-01
Available languages: it