Abstract：The time-frequency electromagnetic (TFEM),which was developed a decade ago,is a new technique for hydrocarbon reservoir detection and evaluation. The TFEM transmitter transmits half square waves to the ground,and the TFEM receivers acquire data in both the frequency and time domains,from which we can respectively acquire induced polarization and resistivity properties of the underground. With years' efforts,we have made some new developments. First,we can transmit both half square wave and full square wave,and record their data. Then we develop pre-processing techniques and procedures for TFEM data of these two types. Finally we put forward qualitative IP parameter calculations and TFEM inversion constrained by logging and seismic data. These new developments have been applied to a PDO project in Oman. Great improvements in both data acquisition and processing are obtained,and final data match very well with previously known data.
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