Patent ID: 9678240
Date: 2017-06-13
CPC Classifications: E21B,G01V

Claim:
1. A method for detecting subsurface layer boundary locations, the method comprising: disposing one or more transmitters and one or more receivers of a resistivity logging tool at a tool depth in a wellbore defined in a subterranean region that includes multiple subsurface layers; taking measurements at the tool depth by operating the one or more transmitters and the one or more receivers of the resistivity logging; accessing the measurements from the one or more transmitters and the one or more receivers of the resistivity logging tool at the tool depth, the measurements including a first measurement associated with a first transmitter-receiver spacing and a second measurement associated with a second, longer transmitter-receiver spacing; and by operation of data processing apparatus, determining boundary locations for the subsurface layers based on the measurements, determining the boundary locations includes: