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Multi-stage perforation initiation method for oil and gas wells based on rapid pressure detection

A detonation method and technology for oil and gas wells, applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve problems such as repeated pressure detection, achieve the effects of preventing repeated detection, improving success rate, and overcoming interference effects

Active Publication Date: 2019-05-24
XIAN UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide a multi-stage perforation detonation method for oil and gas wells based on rapid pressure detection, which solves the problem that the existing detonation methods easily cause repeated pressure detection

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  • Multi-stage perforation initiation method for oil and gas wells based on rapid pressure detection
  • Multi-stage perforation initiation method for oil and gas wells based on rapid pressure detection
  • Multi-stage perforation initiation method for oil and gas wells based on rapid pressure detection

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] The multistage perforation detonation method for oil and gas wells based on rapid pressure detection in the present invention adopts figure 1 The control circuit structure of the oil and gas well multi-stage perforation detonator shown (see the patent "Control circuit and control method of oil and gas well multi-stage perforation detonator", application date: 2014.5.6, application number: 2014101889681), wherein, Including power supply 1, power supply voltage monitoring 2, regulated power supply 3, drive circuit 4, communication interface 5, memory 6, digital controller 7, pressure sensor 8, temperature sensor 9, positive and negative voltage conversion circuit 10, output terminal 11.

[0035] In order to improve the accuracy of command recognition, in view of the problems of slow pressure change and gas leakage in old wells, the follo...

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Abstract

The invention discloses an oil and gas well multi-level perforation detonating method based on rapid pressure detection. The method are specifically implemented according to the following steps: step l: inputting direct voltage; step 2: conducting voltage conversion control on the input direct voltage in step 1. The oil and gas well multi-level perforation detonating method based on the rapid pressure detection adopts pressure difference threshold value detection on pressure conducted at a fixed time interval and therefore is capable of shortening detection time and preventing repeated detection efficiently.

Description

technical field [0001] The invention belongs to the technical field of detonation of oil and gas wells, in particular to a multi-stage perforation detonation method of oil and gas wells based on rapid pressure detection. Background technique [0002] Old wells in oilfields refer to production wells that have been put into normal production until measures are taken again. New wells refer to oil wells that need to be adjusted for development and put into production in order to prolong the stable production period and increase the recovery rate. In the perforation operation of oil and gas wells using pressure coding, the new wells have good suppression effects, obvious pressure amplitude changes, and a high perforation success rate, close to 100%. In contrast, the production difficulty of old wells is greater than that of new wells , the well conditions are more complex, mainly reflected in the poor pressure holding effect of old wells, small downhole pressure changes after pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/1185
CPCE21B43/1185
Inventor 刘庆丰梁德胜冷朝霞
Owner XIAN UNIV OF TECH
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