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A Downhole Oil and Gas Detection Method Based on Electronic Nose

A technology of oil and gas detection and electronic nose, which is applied in the field of petroleum and natural gas exploration and development, can solve the problems of miniaturization of unfavorable gas detection devices, and achieve the effects of miniaturization, real-time monitoring and low cost

Active Publication Date: 2018-03-09
JILIN UNIV
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Problems solved by technology

Chromatographic techniques often require complex pretreatment processes, which undoubtedly increase the complexity of the gas detection system and are not conducive to the miniaturization of gas detection devices.

Method used

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  • A Downhole Oil and Gas Detection Method Based on Electronic Nose
  • A Downhole Oil and Gas Detection Method Based on Electronic Nose
  • A Downhole Oil and Gas Detection Method Based on Electronic Nose

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Embodiment Construction

[0031] The overall working principle of the present invention is as figure 1 As shown, the final analysis and identification of the signal adopts the RBF neural network algorithm, and the RBF neural network structure model is as follows figure 2 shown.

[0032] The steps of the present invention are as follows:

[0033] 1. Filter the sampled drilling fluid to eliminate the pollution of the downhole drilling fluid to the membrane;

[0034] 2. Selectively pass the oil and gas components from the sampling drilling fluid 1 through the membrane 2 and enter the other side of the membrane to achieve the purpose of gas-liquid separation;

[0035] 3. After the gas-liquid separation, the two sides of the membrane are drilling fluid 1 and carrier gas 3 respectively, and the carrier gas 3 carries the separated oil and gas 4 components to the electronic nose 5 for detection, and the oil and gas information is converted into a set of current by the electronic nose 5 Signal;

[0036] 4....

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Abstract

The invention discloses a downhole oil and gas detection method based on an electronic nose, which is to selectively pass the oil and gas components from the sampling drilling fluid into the other side of the membrane through the membrane; after gas-liquid separation, the two sides of the membrane are respectively Drilling fluid and carrier gas, the carrier gas carries the separated oil and gas components to the electronic nose for detection, the oil and gas information is converted into a set of current signals through the electronic nose; the current signals are converted into voltage signals through the current-voltage conversion circuit: the voltage signals are respectively The input signal is amplified by the primary amplifier circuit and the filter module, and the interference signal is filtered out by filtering; then the voltage signal is converted into a DC current signal by the voltage-current conversion circuit; finally, the wireless data signal is sent by the wireless transmitting module; the ground wireless receiving device Receive and record the wireless data signal sent from the bottom of the well; the signal processing and oil and gas discrimination circuit processes the received data signal and judges the oil and gas content in the drilling fluid. The invention uses an electronic nose to detect oil and gas, has low cost and small volume, and is beneficial to miniaturization of a detection device. Continuous and real-time monitoring can be realized.

Description

technical field [0001] The invention relates to an oil and gas downhole detection method, in particular to an electronic nose-based downhole oil and gas detection method, which belongs to the technical field of petroleum and natural gas exploration and development. Background technique [0002] At present, MWD, LWD, and SWD are developing rapidly, and downhole detection while drilling is a major development trend of the mud logging industry. Compared with traditional surface gas logging and mud logging, downhole gas detection while drilling can quickly discover and identify oil and gas, eliminate the lag and interference of oil and gas upward return, and can forecast toxic and harmful gases in advance. It is developing in the direction of real-time, rapid and continuous detection, and downhole gas-liquid separation and detection while drilling. [0003] At present, the degassing method used in the gas separation and detection technology while drilling is mainly membrane sep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/26
Inventor 常志勇孙友宏杨逍郭威刘宝昌高科佟金邓孙华马云海陈东辉
Owner JILIN UNIV
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