2d/3d nuclear magnetic resonance and transient electromagnetic coupled instrument and field work method

Abstract

The invention relates to a 2dimensional / 3dimensional nuclear magnetic resonance and transient electromagnetism combination instrument and a field work method. A computer is connected with a transmitter through a transmitter communication interface, and connected with each receiver through a receiver communication interface, wherein the use number of the receivers depends on whether a detection mode is two-dimensional or three-dimensional, when the detection mode is two-dimensional, eight receivers are used, and when the detection mode is three-dimensional, sixty four receivers are used. A transmitting coil is connected with the transmitter through a transmitting coil interface, and a receiving coil of each receiver unit is connected with the receiver in the receiver unit where the receiving coil is located through a receiving coil interface. When used for detecting, the 2dimensional / 3dimensional nuclear magnetic resonance and transient electromagnetism combination instrument can detect a detecting point respectively with methods of two-dimensional or three-dimensional nuclear magnetic resonance and transient electromagnetism on the premise of guaranteeing that conditions of the transmitting coil and the receiving coils remain unchanged, and therefore transverse resolution of detecting and distribution mapping accuracy of underground water bodies under a complex landform are improved effectively, and risk of digging a dry well is reduced effectively when a well position is delineated.

Description

technical field [0001] The invention relates to a geophysical prospecting device and method, in particular to a geophysical prospecting device and a method for simultaneously realizing nuclear magnetic resonance and transient electromagnetic measurement in a two-dimensional or three-dimensional measurement mode. Background technique [0002] Nuclear magnetic resonance (MRS, Magnetic Resonance Sounding) detection method is currently the only direct groundwater detection method, and transient electromagnetic method can also indirectly realize the detection of groundwater resources by detecting the resistivity of the underground medium. [0003] At present, one-dimensional nuclear magnetic resonance groundwater detection instruments and transient electromagnetic instruments have been widely used. However, under the conditions of complex landforms, one-dimensional nuclear magnetic resonance groundwater detection instruments cannot play a good role. After the combination of elect...

AI Technical Summary

Problems solved by technology

Firstly, the transient electromagnetic technology is used to find out the abnormal area of ​​low resistance underground, and then the nuclear magnetic resonance technology is used to detect the abnormal area of ​​low resistance, and the final nuclear magnetic imaging map is combined with the transient electromagnetic imaging map to explain the groundwater resources. This method can effectively improve the ability to estimate the groundwater body. However, this method cannot realize two-dimensional or three-dimensional detection, which leads to its low horizontal detection resolution. When delineating the well location, There is a greater risk of drilling dry wells

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