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Electromagnetic exploration method and device

An electromagnetic and electromagnetic signal technology, applied in the field of geophysical exploration, can solve the problem of high complexity of the exploration process, and achieve the effects of reducing complexity, reducing volume effect, and improving effect

Active Publication Date: 2022-03-18
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, related technologies require complex equation transformations, resulting in high complexity in the exploration process

Method used

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Embodiment Construction

[0048] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0049] An embodiment of the present disclosure provides an electromagnetic prospecting method, see figure 1 , the method flow provided by the embodiment of the present disclosure includes:

[0050] 101. Obtain the wave field electromotive force set corresponding to each measuring point.

[0051] Among them, the wave field electromotive force set includes multiple electromotive forces collected at each measuring point at different times.

[0052] 102. Determine the distance between each measuring point and the imaging point.

[0053] 103. According to the distance between each measuring point and the imaging point and the wave field electromotive force set of each measuring point, determine the wave field value of each measuring p...

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Abstract

The invention discloses an electromagnetic exploration method and device, and belongs to the technical field of geophysical exploration. The method comprises the following steps: acquiring a wave field electromotive force set corresponding to each measuring point; determining the distance between each measuring point and the imaging point; determining the wave field value of each measuring point at the imaging point according to the distance between each measuring point and the imaging point and the wave field electromotive force set of each measuring point; superposing the wave field values of the measuring points at the imaging points to obtain a total wave field value of the imaging points; and performing electromagnetic exploration according to the total wave field value of the imaging points. The method is designed based on the characteristic that the underground propagation speed of the electromagnetic waves is far lower than the light speed instead of the traditional apparent resistivity concept, equation transformation is not needed, the total wave field value of each imaging point can be calculated through wave field value superposition, the complexity of the measurement process is reduced, and the measurement accuracy is improved. And the volume effect of an electromagnetic method can be effectively reduced, and the exploration effect is improved.

Description

technical field [0001] The present disclosure relates to the technical field of geophysical prospecting, in particular to an electromagnetic prospecting method and device. Background technique [0002] Electromagnetic prospecting method refers to the method of using electromagnetic field as a tool and based on the propagation law of electromagnetic field in the ground. Electromagnetic prospecting methods include DC resistivity method, magnetotelluric sounding method, galvanic couple source transient electromagnetic sounding method, magnetic couple Source transient electromagnetic sounding method, ground penetrating radar method and other methods. Restricted by the volume effect, the resolution of the electromagnetic prospecting method is low. However, as the production practice requires higher and higher precision, how to improve the resolution of the electromagnetic prospecting method becomes crucial. [0003] Since the electromagnetic field in the earth satisfies the dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/08G01V3/38
CPCG01V3/08G01V3/38Y02A90/30
Inventor 肖阳陈清礼唐传章王泽丹王鑫姜梦奇叶玮高园熊峰王攀叶秋焱
Owner PETROCHINA CO LTD
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