DETECTING BED BOUNDARY LOCATIONS BASED ON MEASUREMENTS FROM MULTIPLE TOOL DEPTHS IN A WELLBORE

摘要

Systems, methods, and software for detecting bed boundary locations are described. In some aspects, the boundaries of a subsurface layer are identified based on a measurement from a logging point and a gradient associated with the measurement from the logging point. A first measurement is generated based on operating a transmitter and a receiver of a resistivity logging tool at a first tool depth. The gradient is calculated from the first measurement and a second measurement. The second measurement is generated based on operating the transmitter and the receiver of the resistivity logging tool at a second, different tool depth.

主权项

1. A method for detecting subsurface layer boundary locations, the method comprising:
accessing a first measurement generated based on operating a transmitter and a receiver of a resistivity logging tool at a first tool depth in a wellbore defined in a subterranean region that includes multiple subsurface layers; calculating a gradient associated with the first tool depth, the gradient being calculated from the first measurement and a second measurement, the second measurement generated based on operating the transmitter and the receiver of the resistivity logging tool at a second, different tool depth in the wellbore; and by operation of data processing apparatus, determining a boundary location for one or more of the subsurface layers based on the gradient and the first measurement associated with the first tool depth.