Methods and systems for determining formation parameters using a rotating tool equipped with tilted antenna loops

摘要

Methods and systems for characterizing a formation are disclosed. A tool is placed in the formation. The tool comprises a perpendicular antenna set and a parallel antenna set. The perpendicular antenna set comprises at least one transmitter antenna oriented perpendicular to at least one receiver antenna and the parallel antenna set comprises at least one transmitter antenna oriented parallel to at least one receiver antenna. Data is obtained from the tool and used to determine a compensated geosignal for each of the perpendicular antenna set and the parallel antenna set. The determined compensated geosignal is used to characterize the formation.

主权项

1. A method for characterizing a formation comprising:
placing a tool in the formation;
wherein the tool comprises a perpendicular antenna set and a parallel antenna set;wherein the perpendicular antenna set comprises at least one first transmitter antenna oriented perpendicular to at least one first receiver antenna;wherein the parallel antenna set comprises at least one second transmitter antenna oriented parallel to at least one second receiver antenna; obtaining first data from the at least one first receiver antenna and second data from the at least one second receiver antenna; using the first data to determine a first defined geosignal response for the perpendicular antenna set and the second data to determine a second defined geosignal response for the parallel antenna set, the first defined geosignal response and the second defined geosignal response having modified sensitivity to a first formation parameter; determining the first formation parameter using the first defined geosignal response and the second defined geosignal response.