A self-compensating three-component towed transient electromagnetic prospecting device and prospecting method
A transient electromagnetic, three-component technology, applied in the field of geophysical exploration equipment, can solve the problems of insufficient secondary field information, large primary field interference, etc., achieve high-precision stereo detection, overcome serious primary field interference, and simple structure. Effect
Active Publication Date: 2022-04-01
JILIN UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to provide a self-compensating three-component towed transient electromagnetic exploration device to solve the problems of excessive primary field interference and insufficient secondary field information
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[0030] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0031] Such as figure 1 As shown, a self-compensating three-component towed transient electromagnetic prospecting device adopts the offset receiving method and uses a double-platform structure. The towing vehicle platform A and the 20cm high platform C are laid in parallel; the prospecting device includes transmitting and receiving control System B, the system is composed of a transmitter and a receiver; the survey device also includes a transmitting coil and a receiving coil; wherein, the transmitting coil 4, the x-component receiving coil 2 and the y-component receiving coil 3 are laid on the trailer platform, and the z-c...
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The present invention relates to the field of geophysical prospecting equipment, in particular, to a self-compensating three-component towed transient electromagnetic prospecting device and a prospecting method. The car platform is laid parallel to the high platform, and the z-component receiving coil is laid on the high platform; the transmitting coil, the x-component receiving coil and the y-component receiving coil are laid on the towing vehicle platform, wherein the x-component receiving coil is laid perpendicular to the ground and the driving direction of the towing vehicle platform The right side of the y-component receiving coil is laid vertically on the ground and the rear side of the driving direction of the towing vehicle platform. The center line of the x-component receiving coil coincides with the x-axis center line of the transmitting coil; the center line of the y-component receiving coil coincides with the y-axis center line of the transmitting coil , to solve the problem of excessive primary field interference and insufficient secondary field information, and adopt a separate three-component receiving coil structure to realize the acquisition of three components of secondary field information with zero offset.
Description
technical field [0001] The invention relates to the field of geophysical prospecting equipment, in particular to a self-compensating three-component drag transient electromagnetic prospecting device and a prospecting method. Background technique [0002] Transient electromagnetic method (Time domain electromagnetic methods, TEM) is a geophysical prospecting method based on the law of electromagnetic induction. An important method for problems such as resource exploration. Due to the coupling effect of the transmission to the receiving coil in the ground TEM, the effective secondary field signal is aliased with the primary field interference. If the primary field interference is strong, the effective secondary field signal cannot be extracted, resulting in the loss of shallow geological information. Therefore, how to weaken the coupling of the transmitting and receiving coils and obtain the pure quadratic field information of the three components of xyz is of great significa...
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IPC IPC(8): G01V3/08
CPCG01V3/083
Inventor 林君贾文枫殷光耀张洋
Owner JILIN UNIV