A magnetotelluric data acquisition system and its acquisition method

A technology of magnetotelluric and acquisition system, which is applied in the field of applied geophysical exploration to achieve the effects of less instruments and equipment, wide application prospects and low production cost

Active Publication Date: 2017-09-26
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to solve the technical problem in the prior art that two different data acquisition systems need to be used to separately collect low-frequency magnetotelluric data and high-frequency or audio frequency magnetotelluric data, and provide a Acquisition system and method for collecting broadband magnetotelluric data

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  • A magnetotelluric data acquisition system and its acquisition method
  • A magnetotelluric data acquisition system and its acquisition method
  • A magnetotelluric data acquisition system and its acquisition method

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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0026] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] In the following description, the frequency range of lo...

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Abstract

The magnetotelluric data collection system of the embodiment of the present invention includes a data collection station capable of simultaneously collecting low-frequency magnetotelluric data and high-frequency or audio frequency magnetotelluric data and a broadband magnetic field sensor capable of switching between high and low frequencies. The magnetotelluric data acquisition system and its acquisition method of the present invention have three acquisition modes for different exploration purposes. Collection method 1 collects high-frequency or audio magnetotelluric data; when it is set to collection method 2, at any observation point, low-frequency magnetotelluric data and high-frequency or audio magnetotelluric data can be collected sequentially, and low-frequency magnetotelluric data can be collected Combined with high-frequency or audio magnetotelluric data in a broadband magnetotelluric data file; acquisition method 3 collects low-frequency magnetotelluric data. The collection system of the present invention has the advantages of low production cost, high data collection efficiency, simple and reliable field production operation, less instruments and equipment used, and the like.

Description

technical field [0001] The invention belongs to the field of applied geophysical prospecting, and in particular relates to a magnetotelluric data collection system and a collection method thereof. Background technique [0002] Magnetotellurie (MT for short) in geophysical prospecting appeared in the early 1950s and was proposed by L. Cagniard of France and A.N. Tikhonov of the Soviet Union. . It is a geophysical method using the natural electromagnetic field as a field source, also known as the Magnetotelluric Method (The Magnetotelluric Method). In a sense, it can be said to be the development of the earth current method. When the alternating electromagnetic field propagates underground in the form of waves, reflection and refraction occur at the interface of different media, which can bring information about the resistivity distribution of the underground medium. In fact, by measuring the surface horizontal electric field component E at various frequencies X (or E Y )...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/08
Inventor 余刚何展翔孙卫斌
Owner BC P INC CHINA NAT PETROLEUM CORP
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