Sandstone type uranium mine drilling transient electromagnetic logging device and logging method

A transient electromagnetic logging, sandstone type technology, which is applied in measurement devices, electrical/magnetic detection for logging records, and electrical/magnetic exploration, etc., to improve signal-to-noise ratio, good coupling, and improve induction the effect of strength

Pending Publication Date: 2021-11-16
核工业二0三研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many patents on transient electromagnetic logging, there are few in the field of sandstone-type uranium logging, and there are certain defects in drilling logging in sandstone-type uranium deposits

Method used

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  • Sandstone type uranium mine drilling transient electromagnetic logging device and logging method
  • Sandstone type uranium mine drilling transient electromagnetic logging device and logging method
  • Sandstone type uranium mine drilling transient electromagnetic logging device and logging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: The embodiment of this application discloses a sandstone-type uranium ore drilling transient electromagnetic logging device, including a probe 1, a transmitter 2 placed in the probe 1, a receiver 3, an internal connector 4 and an external The connector 5; the probe tube 1 is made of a high-strength cylindrical hollow plastic shell; the transmitting device 2 is located in the middle of the probe tube 1; At the end, the transmitting device 2 and the receiving device 3 are fixedly connected to the internal connecting piece 4 , and the transmitting device 2 and the receiving device 3 are connected to the external connecting piece 5 through the internal connecting piece 4 .

[0040] The probe tube 1 is hollow cylindrical, one end of the probe tube 1 is connected with a conical plastic shell 101, the other end is provided with a first protruding structure 102 and a second protruding structure 103, and the outer wall of the first protruding structure 102 is provid...

Embodiment 2

[0050] Embodiment 2: A drilling transient electromagnetic logging method for sandstone-type uranium deposits, including S1. Before logging, a detailed understanding of the drilling geology and hole body structure should be carried out, and irrelevant objects at the wellhead should be removed to ensure the safety of the well site;

[0051] S2. Before starting the logging instrument, it is necessary to carefully check the matching degree of the voltage and frequency of the external power supply and the equipment; all switches and knobs are in a safe position, the wiring is correct, and the power is turned on after repeated checks to confirm that it is correct;

[0052] S3. Connect the transient electromagnetic probe 1 with other probes for logging in sandstone-type uranium deposits through the external connector 5 to form a combined probe; the connection and sealing of the probe 1 should be carefully checked before going into the well. Soft rubber waterproof tape and electrical i...

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PUM

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Abstract

The invention discloses a sandstone type uranium mine drilling transient electromagnetic logging device. The device comprises an exploring tube, a transmitting device arranged in the exploring tube, receiving devices, an internal connecting piece and an external connecting piece; the transmitting device is located in the middle of the interior of the exploring tube; the four receiving devices are distributed at the two ends of the transmitting device respectively; the transmitting device and the receiving devices are jointly and fixedly connected to the internal connecting piece; the transmitting device and the receiving devices are connected to the external connecting piece through the internal connecting piece. The logging device is based on the full-space transient electromagnetic detection principle, a detection coil is arranged perpendicular to a drill hole, the detection coil is well coupled with a geologic body, and metal interference is avoided; a one-transmitting and multi-receiving device mode is adopted, the detection mode is flexible, geologic bodies of different depths can be subjected to multiple coverage detection; a magnetic core is added into the detection coil, so that the induction signal strength can be effectively improved, the signal-to-noise ratio can be improved, and the electromagnetic field response characteristics of the geologic bodies on the periphery of a hole wall can be obtained.

Description

technical field [0001] The application belongs to the technical field of geophysical electromagnetic logging, and in particular relates to a sandstone type uranium ore drilling transient electromagnetic logging detection device and a logging method thereof. Background technique [0002] Transient electromagnetic method (TEM) is a time-domain artificial source electromagnetic sounding method based on the principle of electromagnetic induction. It excites the electromagnetic field by introducing a step current into the transmitting loop. During the propagation of the excited primary pulse electromagnetic field to the underground space, the underground geological body will generate a time-varying induced electromagnetic field under the excitation of the primary field ( Secondary field), through the extraction and analysis of the secondary field signal by the receiving loop, the geoelectric characteristics at different depths can be obtained. [0003] At present, with the reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/28G01V3/38
CPCG01V3/28G01V3/38
Inventor 时志浩叶雷刚陈擎陈斌张胜龙王继斌康利刚李强邵恒博张未
Owner 核工业二0三研究所
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