| 摘要 |
The invention is related to the field of geophysics and, in particular, to search and delineation of hydrocarbon reservoirs without well drilling. The objective of the invention is higher reliability and accuracy of deposit identification. The claimed method comprises irradiation of the geological profile under study from a mobile platform with an electromagnetic wave at two fixed frequencies fand f, measurement of electric field intensities Eand Eat these frequencies at geological profile points with operating transmitters, then measurement of electric field intensities Eand Ewith transmitters disabled, determination of a differential signal E=E-Eand E=E-Efor each frequency, calculation of the ratio β=E/Efor each point of the geological profile, and determination of coordinates of the geological profile measurement points by the global positioning system. From anomalous values of parameter β and on the basis of the global positioning system data, the presence and boundaries of a deposit are judged. The number of fixed frequencies used can be more than two. The device according to the invention comprises the following units mounted on a mobile platform: transmitters (1), (3) and receivers (2), (4) forming two transceiving pairs, an interface unit (5), a navigation receiver (6), a terminal device (7), a control unit (8), and two switching devices (8) and (9). All above-mentioned receivers and transmitters are equipped with antennas that can be spatially oriented. The antennas, except for the antenna of the receiver (6), are mounted at a fixed suspension height. The input of the interface unit (5) is connected to the navigation receiver (6) and the switching device (10), and its output is connected to the terminal device (7). The transmitters (1), (3) are arranged on the platform, in respect of the receivers (2), (4), at a distance satisfying the condition: X/λ=X/λ=const, where Xand Xare distances between respective transmitters and receivers, λand λare wavelengths corresponding to radiation frequency of transmitters (1), (3). The outputs of the switching device (9) are connected to the respective inputs of transmitters (1), (3), and the outputs of the receivers (2), (4) are connected to the respective inputs of the switching device (10). The output of the control unit (8) is connected to the switching devices (9), (10), and its input is connected to the terminal device (7). The number of transceiving pairs can be more than two. |
