LOOK-AHEAD OF THE BIT APPLICATIONS

An apparatus for measuring resistivity downhole in a well includes a tool having at least one transmitter antenna and receiver antenna. The transmitter antenna and the receiver antenna are tilted at angles such that signals from layers between the transmitter antenna and the receiver antenna are at...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	BITTAR, Michael S, DONDERICI, Burkay
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DETECTING MASSES OR OBJECTS EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS GEOPHYSICS GRAVITATIONAL MEASUREMENTS MEASURING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PHYSICS TESTING
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	An apparatus for measuring resistivity downhole in a well includes a tool having at least one transmitter antenna and receiver antenna. The transmitter antenna and the receiver antenna are tilted at angles such that signals from layers between the transmitter antenna and the receiver antenna are at least reduced. Alternatively, the transmitter antenna and the receiver antenna are tilted at angles such that signals from layers being outside a region between the transmitter antenna and the receiver antenna are at least reduced. Signals from multiple collocated antennas are combined to produce synthetical tilt angles. Tilted transmitter and receiver pairs are used to focus resistivity measurements ahead of the bit or around the tool, based on which region of signals are at least reduced.