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Prealarming method and method for avoiding oil gas well drilling neighbouring wellbore collision

A technology of oil and gas drilling and early warning system, which is applied in the direction of drilling equipment and methods, drilling equipment, wellbore/well components, etc., which can solve the problems of inability to realize continuous monitoring and difficulty in implementation, and achieve simple structure, reduce risk, and use Safe and reliable effect

Active Publication Date: 2012-07-04
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is affected by the operating conditions, operating environment, and the experience and responsibility of the listeners. The actual implementation is extremely difficult, and effective continuous monitoring cannot be achieved.

Method used

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  • Prealarming method and method for avoiding oil gas well drilling neighbouring wellbore collision
  • Prealarming method and method for avoiding oil gas well drilling neighbouring wellbore collision
  • Prealarming method and method for avoiding oil gas well drilling neighbouring wellbore collision

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Embodiment 1

[0023] Such as figure 1 As shown, the present embodiment is a single platform collision early warning system. The present invention is used in the casing 11, 21, An acceleration sensor 12, 22, 32, 42 is arranged on 31, 41 respectively, through each acceleration sensor 12, 22, 32, 42, physical characteristics such as vibration frequency, wavelength and amplitude of each bushing can be obtained. Each acceleration sensor 12 , 22 , 32 , 42 is connected to the input terminal of a charge amplifier 5 through a wire, and the charge amplifier 5 has a band-pass filter function. The output end of the charge amplifier 5 is connected with a synchronous data acquisition instrument 6 through wires, and the synchronous data acquisition instrument 6 is connected with a computer 7 through wires.

[0024] Since casings 11, 21, 31, and 41 are denser than nearby rocks and cement sheaths, they are more conducive to the propagation of vibration waves. The vibration characteristics sensed by the ac...

Embodiment 2

[0033] This embodiment is a wireless communication single platform collision warning system (such as Figure 4 Shown in the upper part), its difference with Embodiment 1 is: the synchronous data acquisition instrument 6 is not connected to the computer 7 by wires, but is connected to a wireless access point 8 by the synchronous data acquisition instrument 6, and the wireless access point 8 is provided with an antenna 81, and the computer 7 is also connected to another wireless access point 9 by another wire, and another antenna 91 is connected to the wireless access point 9. The synchronous data acquisition instrument 6 is connected with the computer 7 through wireless communication.

Embodiment 3

[0035] The present embodiment is a wireless communication dual-platform collision warning system (such as Figure 4Shown), there are four adjacent wells 101, 102, 103, 104 around the positive drilling 1 except the adjacent wells 2, 3, and 4 that need early warning. In this embodiment, these four adjacent wells 101, 102, 103 and 104 serve as another early warning platform. An acceleration sensor 121, 122, 123, 124 is respectively arranged on the casing pipe 111, 112, 113, 114 of the adjacent well 101, 102, 103, 104, through which each set of acceleration sensors 121, 122, 123, 124 can detect the Vibration signals of tubes 111, 112, 113, 114. Each acceleration sensor 121, 122, 123, 124 is also respectively connected to the input end of a charge amplifier 5' through a wire, and the charge amplifier 5' has a band-pass filter function. The output terminal of the charge amplifier 5' is connected to another synchronous data acquisition instrument 6' through a wire, and the synchron...

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Abstract

The invention relates to an early warning method and a method for avoiding adjacent well bores of oil-gas well drilling from colliding, the early warning method of the invention main comprises the following steps: firstly, respectively mounting acceleration sensors on a positive well drilling and adjacent well cannulas which are possible to collide, secondly, processing vibrating signals which are induced by various acceleration sensors, and sending to a synchronous data gathering instrument, thirdly, leading the synchronous data gathering instrument to synchronously adopt vibrating data of various speed sensors in real time, and sending to a computer, fourthly, analyzing whether the analysis and judgment of a software to vibrating data has well pores colliding danger or not through vibrating data which is embedded by a computer, fifthly starting an alarming system according to the analyzing and judging results. The method can finally judge out that which adjacent well pore has a collided danger, and can alarm in time, thereby effectively lowering a danger of drilling through an adjacent well cannula. The method can be widely applied in various oil-gas well drilling processes.

Description

technical field [0001] The invention relates to a collision early warning method and system, in particular to an early warning method and system for avoiding collision of adjacent boreholes in oil and gas drilling. Background technique [0002] With the increasing demand for adjustment well drilling in the development of oil and gas fields, the anti-collision problem of infill wells has become increasingly prominent. In some cases, anti-collision problems have restricted the smooth progress of drilling and completion operations. If it is not discovered in time that the drill bit has approached or drilled into the wellbore of the adjacent well during the drilling process, there is a possibility of drilling through the casing of the adjacent well in a relatively short period of time, resulting in great or even great economic losses. There are two main types of anti-collision monitoring technologies that can be used at present. One is to rely on downhole electromagnetic measu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00E21B7/00
Inventor 何保生刘刚王平双刘志国周建良刘书杰
Owner CHINA NAT OFFSHORE OIL CORP
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