Oil-gas well perforation ground monitoring method

Abstract

The invention discloses an oil-gas well perforation ground monitoring method, comprising the following steps of: 1, collecting signals for vibration waves transmitting along the wall of an oil pipe when a perforating gun detonates; 2, filtering the collected signals; 3, performing short-time energy analysis to the filtered signals, comparing the analysis result with a preset threshold, if the comparison result reaches the preset threshold, determining that the detonation is successful, otherwise, repeating the steps 1 to 3. Through monitoring more than 3000 oil wells by using the oil-gas well perforation ground monitoring device, the test shows that the success rate for monitoring the detonation of the perforation is more than 96%. The maximum perforation well depth of the monitored oil wells is 7140m, and the minimum perforation well depth of the same is 119m. The oil-gas well perforation ground monitoring method is stable in performance, simple to operate and wide in application prospect. Meanwhile, through setting the threshold, an enormous database can be omitted, such that the implementation cost of the oil-gas well perforation ground monitoring method is reduced, and detonation rules are prevented from searching.

Description

Technical field [0001] The present invention involves oil and gas well radio holes monitoring technology, and specifically involves a ground monitoring method of an oil and gas well. Background technique [0002] At present, in the operation of the oil and gas well, it is necessary to determine whether the firearm gun burst is usually the on -site operators to feel vibration at the well entrance. This greatly reduces personal safety guarantee.To the first of safety, it is necessary to use another way to judge the explosion of the fire -hoop gun in the fire -hole operation, which can ensure the safety of the on -site operators and accurately determine the explosion of the shot gun.In the early days, there have been reports that introduce the instrument that burst the fire -filled gun gun under the ground monitoring well.At the same time, the mutation judged whether the firing gun was burst.However, such judgments are made by the experience of on -site operators' credentials and no...

AI Technical Summary

Problems solved by technology

[0003] The above two patents differ from this patent in the following ways: 1. There is no description of what kind of filtering process is performed on the collected data; 2. There is no detailed introduction to the judging detonation method and the judgment process

3. The judgment principle and basis for judging the detonation of the perforating gun are not explained, and how to deal with the interference signal

[0005] The tubing wave monitoring technology and method have played an important role in judging the detonation of the perforating gun in the actual use in the past few years. At the same time, it is also found that it cannot be correctly judged whether the perforating gun is detonated in the following three situations: A. The detonator did not detonate after the body hit the detonator, and this impact signal was judged as the detonation signal; when B was pressurized and detonated (or with a hole opener), the mechanical signal of pin shearing in the detonator was misjudged as the perforation detonation

C When operating with a packer, the transmission channel of the vibration signal will be blocked by the action of the packer, which will cause the perforation detonation to not be received and the operator will not make a judgment

Although these three situations are rare, incorrect judgment results will have a certain impact on site construction operations and the safety of operators.

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