Electromagnetic measurement-while-drilling system and method based on adjacent well receiving antenna

A technology of receiving antenna and measurement while drilling, applied in construction and other directions, can solve the problems of increasing the incidence of drilling accidents, reducing the strength of drill pipe, and accumulating signal errors, so as to reduce external interference, reduce propagation loss, and reduce bandwidth.

Pending Publication Date: 2017-06-27
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the repeater is installed in the drill pipe, the strength of the drill pipe is greatly reduced and the incidence of drilling accidents is increased; secondly, each stage of relay transmission needs to decode and demodulate the electromagnetic wave signal, and restore the measured data Re-encoding and modulation, and the use of electromagnetic waves of different frequencies for each level of relay transmission, will cause the signal errors generated by each level of relay to accumulate, and even cause the measurement while drilling to fail

Method used

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  • Electromagnetic measurement-while-drilling system and method based on adjacent well receiving antenna
  • Electromagnetic measurement-while-drilling system and method based on adjacent well receiving antenna
  • Electromagnetic measurement-while-drilling system and method based on adjacent well receiving antenna

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Embodiment 1

[0045] Embodiment 1. An electromagnetic measurement-while-drilling system based on an offset well receiving antenna. The following will combine figure 1 An electromagnetic measurement-while-drilling system based on an offset well receiving antenna of the present invention is introduced in detail.

[0046] Such as figure 1 and 2 As shown, an electromagnetic measurement-while-drilling system based on an offset well receiving antenna includes a drill pipe transmitting assembly 1 , an adjacent well receiving assembly 2 and a ground display terminal 3 .

[0047] The drill pipe launching assembly 1 is inserted into the bottom of the well 4 to be measured, the adjacent well receiving assembly 2 is arranged in the adjacent well 5, and the upper end of the drilling pipe launching assembly 1 is electrically connected to the adjacent well receiving assembly 2, The lower end is wirelessly connected with the adjacent well receiving assembly 2 , and the adjacent well receiving assembly 2...

Embodiment 2

[0060] Embodiment 2. An electromagnetic measurement-while-drilling method based on an offset well receiving antenna. The following will combine Figure 5 An electromagnetic measurement-while-drilling method based on an offset well receiving antenna of the present invention is introduced in detail.

[0061] Such as Figure 5 As shown, an electromagnetic measurement-while-drilling method based on an offset well receiving antenna includes the following steps:

[0062] Step 1: The drill pipe launch assembly 1 collects the sensing parameter signal of the well 4 to be measured and performs the first signal processing to obtain the simulated parameter signal to be launched;

[0063] Step 2: The drill pipe transmitting assembly 1 transmits the analog parameter signal to the adjacent well receiving assembly 2 in the adjacent well 5;

[0064] Step 3: the adjacent well receiving component 2 receives the simulated parameter signal and performs second signal processing to obtain target ...

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Abstract

The invention relates to an electromagnetic measurement-while-drilling system and method based on an adjacent well receiving antenna. The system comprises a drill pipe emitting assembly, an adjacent well receiving assembly and a ground display terminal. The drill pipe emitting assembly is inserted into the bottom of a to-be-measured well; the adjacent well receiving assembly is arranged inside an adjacent well; the upper end of the drill pipe emitting assembly is electrically connected with the adjacent well receiving assembly, and the lower end of the drill pipe emitting assembly is in wireless connection with the adjacent well receiving assembly; and the adjacent well receiving assembly is electrically connected with the ground display terminal. The adjacent well receiving antenna is adopted for receiving signals, ground power frequency interference can be avoided, propagation loss of electromagnetic wave signals on an upper stratum of an adjacent well receiver, the measurement depth of the electromagnetic measurement-while-drilling system is increased greatly, and the electromagnetic measurement-while-drilling system and method based on the adjacent well receiving antenna can be widely applied to exploration and development of new energy resources like coal bed gas, shale gas, geothermal wells and hot dry rock.

Description

technical field [0001] The invention relates to the technical field of geological exploration, in particular to an electromagnetic measurement-while-drilling system and method based on adjacent well receiving antennas. Background technique [0002] In the exploration and development of new energy sources such as shale gas, coalbed methane, combustible ice, geothermal, and hot dry rock, in order to ensure the smooth progress of drilling, it is necessary to obtain the bottom-hole parameters in time and transmit these drilling parameters to the surface, that is, Measurement While Drilling. Measurement while drilling is divided into cable measurement and wireless measurement while drilling according to the transmission medium of information. The traditional wireline measurement needs to lower the measuring instrument into the bottom hole for measurement after the drilling is stopped, which interferes with the normal drilling operation and cannot obtain real-time drilling parame...

Claims

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Application Information

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IPC IPC(8): E21B47/13
CPCE21B47/13Y02A90/30
Inventor 王成立维克多·费多罗维奇·契霍特金卢春华蒋国盛吴翔陆洪智左国勇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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