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MWD electromagnetic wave transmission method
Nov 27, 2018

The electromagnetic wave signal transmission is mainly realized by the formation medium. The downhole instrument loads the measured data onto the carrier signal, and the measurement signal is transmitted from the electromagnetic wave transmitter to the surrounding with the carrier signal, as shown in FIG. The ground detector unloads, decodes, and calculates the measurement signal in the detected electromagnetic wave on the ground to obtain actual measurement data.

mwd

The advantage of this method is that the data transmission speed is fast, and it is suitable for transmission orientation and geological data parameters in drilling construction such as ordinary mud, foam mud, air drilling and laser drilling.

The disadvantage is that the formation medium has a great influence on the signal, the low-resistivity formation electromagnetic wave cannot pass through, and the electromagnetic wave transmission distance is also limited, which is not suitable for deep well construction.


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