Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof

A technology of measuring while drilling and receiving devices, which can be used in construction and other directions, and can solve the problems of weak electromagnetic signal detection that have not been mentioned in relevant literature and patents.

Active Publication Date: 2013-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by making full use of the characteristics of array signal processing and combining wellsite noise cancellation methods to solve the detection of weak electromagnetic signals in EM-MWD systems, there are no relevant literatures and patents.

Method used

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  • Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof
  • Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof
  • Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof

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Embodiment Construction

[0053] The invention provides a remote ground receiver device of an electromagnetic measurement-while-drilling system and a corresponding processing method, which are used in the electromagnetic measurement-while-drilling system to receive downhole measurement data in real time.

[0054] The remote wireless receiving device of EM-MWD system is composed of DSP circuit, preamplifier, bandpass filter, coupling transformer, wireless transceiver module, auxiliary module, receiving antenna array and power supply.

[0055] (1) Receiving antenna array

[0056] Receive electromagnetic signals carrying downhole information. The purpose of the array design is to maximize the signal-to-noise ratio of the received data. In the actual implementation process, it is necessary to properly arrange and select the receiving points and their mutual positions. Using a line array instead of an area array avoids the complexity of debugging and reduces costs. Such as figure 1 shown.

[0057] (2) ...

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Abstract

The invention relates to an electromagnetic wave measurement while drilling system wireless remote receiving device and a measuring method and application of the electromagnetic wave measurement while drilling system wireless remote receiving device. The electromagnetic wave measurement while drilling system wireless remote receiving device comprises an antenna receiving array and a remote receiving unit which comprises a central processing unit, a control circuit, a wireless receiving and dispatching module and a power supply. The wireless receiving and dispatching module is connected with the central processing unit through the control circuit. The device is used for remotely receiving electromagnetic wave measurement while drilling system signals and used for receiving measurement signals in an electromagnetic wave measurement while drilling system. A digital signal processor (DSP) technology and an array signal processing technology are adopted to achieve suppression of well site noise. Through an array element with a reasonable layout, an advanced digital signal processing algorithm is matched to achieve remote receiving of weak electromagnetic signals, adaptive capacity, to different strata, of the electromagnetic wave measurement while drilling system is effectively improved, processing gain and receiving sensitivity are improved, and measuring depth is improved.

Description

technical field [0001] The invention belongs to a measuring-while-drilling instrument used in the exploration and development of minerals, petroleum and natural gas resources. In particular, the invention relates to the fields of remote reception of electromagnetic wave signals and real-time measurement of downhole information of a measurement-while-drilling system, and belongs to the ground device of the measurement-while-drilling system. Background technique [0002] The electromagnetic measurement while drilling (EM-MWD) system is gradually developed with the continuous development of underbalanced drilling, gas drilling and other special process wells. The emergence of this technology effectively solves the problem of the traditional mud MWD system in these complex process wells. The problem of engineering measurement requirements cannot be well completed. Due to its high signal transmission speed, data transmission without circulating drilling fluid, short measurement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/13
Inventor 杨春国刘科满高炳堂陈晓晖宋朝晖王立双
Owner CHINA PETROLEUM & CHEM CORP
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