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Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring

An acoustic emission, oilfield well technology, applied in surveying, earthmoving, wellbore/well components, etc., can solve the problems of scrapping oil production wells and low accuracy, and achieve increased oil production, high recovery, and economic effect of benefit

Inactive Publication Date: 2012-11-21
张景和
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Problems solved by technology

However, at present, the accuracy of positioning monitoring and providing downhole conditions in oil fields is extremely low, resulting in serious scrapping of oil production wells

Method used

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  • Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring
  • Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring
  • Method for accurately drawing downhole conditions of oil field by acoustic emission located monitoring

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Embodiment Construction

[0029] specific implementation plan

[0030] Such as Figure 1 to Figure 4 As shown, a method for acoustic emission positioning monitoring to accurately draw oilfield downhole conditions, the production method is composed of the following steps:

[0031] (1) Set up at least three signal receivers at intervals and in any direction on the ground around the water injection well to collect and process the dynamic signal of formation fractures of the water injection well;

[0032] (2) Use fracturing and water injection equipment to press liquid into the water injection well, the liquid pressed into the underground rock formation will crack or close the rock formation and the liquid flow will generate low-frequency sound, and the signal receiver and low-frequency sound signal receiving and processing equipment will be used to receive and handle the signal;

[0033] (3) Detect the sound source signal according to the signal, and draw a rectangular coordinate diagram corresponding...

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Abstract

The invention relates to a method for accurately drawing downhole conditions of an oil field by acoustic emission located monitoring, which comprises the steps of: arranging at least three signal receivers in any direction at intervals on the ground around a water injection well to collect dynamic signals of a formation fracture of the water injection well and process time difference; pressing liquid into the water injection well by a fracture and water injection device, wherein the liquid pressed into the underground rock stratum enables the rock stratum crack or close and the liquid flows to generate a low frequency sound, and receiving and processing the signal by a low frequency sound signal receiving and processing device; checking and measuring a sound source signal according to the signal and drawing a right angle coordinate map corresponding to the distribution of each sound source signal by using the water injection well as an origin so as to obtain the downhole conditions of the water injection well accurately. According to the invention, a changing low-frequency sound can be formed by pressing liquid into an oil storage layer of the water injection well effectively so that a downhole condition map of the water injection well can be quickly and accurately drawn, and the economic benefit of the oil field can be greatly improved.

Description

[0001] technical field [0002] The invention relates to a method for acoustic emission positioning monitoring and accurate mapping of downhole conditions in oil fields. Background technique [0003] The well groups in the oil field are divided into two categories: oil production wells and water injection wells. The function of the production well is to extract oil from the underground reservoir. The role of the water injection well is to inject water (or other liquids, or inject gas) into the underground oil reservoir to drive the oil in the underground oil reservoir to the oil production well so that the oil production well can extract the oil in the remaining oil reservoirs around the well. The approximate distribution of well groups in an oil field is that several water injection wells are set at intervals (several tens of meters to hundreds of meters) around an oil production well; the theoretical best solution should be that the high-pressure liquid or gas inject...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B47/14
Inventor 张景和
Owner 张景和
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