Relief well and accident well connection detection system and detection method thereof

Abstract

The invention relates to a relief well and accident well connection detection system and a detection method thereof. The detection system comprises a three-component magnetic core probe and a transmission unit and the like. The three-component magnetic core probe consists of a Z probe, an X probe, and a Y probe, wherein each two of the Z probe, the X probe, and the Y probe are perpendicular to each other; and the X probe, the Y probe and the Z probe include transmitting coils and receiving coils respectively. The transmitting unit is used for transmitting a transient excitation signal; the transmitting coils of the Z probe, the X probe, and the Y probe receive transient excitation signals and spread the transient excitation signals to an accident well by a relief well to generate a Z-direction induction signal, an X-direction induction signal, and a Y-direction induction signal; the receiving coils of the Z probe, the X probe, and the Y probe receive the Z-direction induction signal, the X-direction induction signal, and the Y-direction induction signal correspondingly and respectively; the received Z-direction induction signal, X-direction induction signal, and Y-direction induction signal are transmitted to a ground unit by a receiving unit and a collection and transmission unit; and the ground unit calculates a distances between the accident well and the three-component magnetic core probe and directions of the accident well and the three-component magnetic core probe according to the Z-direction induction signal, the X-direction induction signal, and the Y-direction induction signal and then the information is displayed.

Description

technical field [0001] The invention relates to the field of oil exploitation safety assurance, in particular to a detection system and a detection method for the connection between a rescue well and an accident well. Background technique [0002] In drilling operations, once a blowout is out of control, not only will the oil and gas resources be severely damaged, but it will also easily lead to fires, causing casualties, equipment damage, oil and gas well scrapping and environmental pollution and other vicious accidents. Among them, the oil well where the blowout accident occurred is called the accident well, and the directional well designed and constructed for emergency control of the accident well is called the rescue well. Usually there is a certain distance between the rescue well and the accident well. In the actual rescue, the distance and orientation of the accident well relative to the rescue well should be detected first, then the accident well and the rescue well...

AI Technical Summary

Problems solved by technology

Although this method can also realize the detection and location of the accident well to a certain extent, the casing must be run in the rescue well, and the electrode system must be in good contact with the rescue well casing to inject low-frequency alternating current into the formation to realize The required conditions are more complicated, and the low-frequency alternating current gathered on the casing of the accident well is very weak and difficult to detect

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