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Remote determinator for well head gas

A measuring instrument and wellhead gas technology, which is applied in measurement, wellbore/well components, earthwork drilling and production, etc., can solve problems such as the influence of measurement and analysis accuracy, and achieve the effect of convenient maintenance

Active Publication Date: 2012-09-19
XI AN JIAOTONG UNIV
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Problems solved by technology

However, there is currently no adjustment measure for the pressure value of the analyzed gas, so the accuracy of measurement and analysis is greatly affected by the change of the pressure value of the analyzed gas

Method used

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  • Remote determinator for well head gas
  • Remote determinator for well head gas
  • Remote determinator for well head gas

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Embodiment Construction

[0023] The present invention is described in further detail below in conjunction with accompanying drawing:

[0024] see Figure 1-5 , the structural diagram of the wellhead gas remote measuring instrument is attached figure 1 shown.

[0025] Marked in the figure: 1- the shortest gas path connecting pipeline; 2- self-calibration pressure regulating system; 3- spectral gas analysis system; 4- data wireless remote transmission system.

[0026] The spectroscopic gas analysis system consists of a Fourier transform infrared spectrometer and a computer. The computer adopts an industrial computer with more than three RS232 / 485 serial ports, or a computer with only one such serial port is connected to a serial port expansion card. Its structure The diagram is attached figure 2 shown. The task of the spectral gas analysis system is to quantitatively analyze the composition and concentration of the gas entering the system. The analysis system is calibrated as follows:

[0027] 1)...

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Abstract

The invention discloses a remote determinator for well head gas, which comprises a shortest gas circuit connecting pipeline, a self-calibration closed loop voltage regulation system, an intermediate infrared spectrum gas analysis system and a data wireless remote transmission system which are sequentially connected with one another. The determinator is positioned at a well head; the shortest gas circuit connecting pipeline is arranged and analysis results is transmitted to a monitoring center through the data wireless remote transmission system in a remote transmission way, so that the remote determinator for the well head gas can be ensured to respond rapidly in real time on line; and the self-calibration closed loop voltage regulation system can ensure air pressure in each system air chamber in different time and different places to be kept within allowable deviation range, so that the influence on analysis result accuracy by the air pressure in each air chamber can be reduced to allowable limit. The remote determinator provided by the invention solves the problems that common gas measuring and recording well device can not be put at the well head, has a long gas circuit connecting pipeline, needs long time to respond and misses the measurement of a thin oil gas layer, and air pressure in the air chamber in the spectrograph gas analysis system influences measuring and analyzing results in oil-gas exploration well site.

Description

Technical field: [0001] The invention relates to the field of on-line quantitative analysis of instruments and meters, in particular to the field of exploration well gas logging and mud logging based on infrared spectrum analysis. Background technique: [0002] The tomographic gas composition and quantitative analysis data of gas logging in oil and gas exploration are used as the basis for the evaluation of the existence, productivity and development value of oil and gas layers. At present, the conventional gas logging analysis device commonly used in oil and gas exploration logging occasions cannot be placed at the wellhead due to the existence of an open flame. The longer the gas pipeline for connection, the longer the response time of the gas logging analysis device. Usually the gas pipeline is more than 50 meters long, and the analysis period is more than 2-4 minutes. At present, the drilling speed of oil and gas fields has generally reached several meters per minute, s...

Claims

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Application Information

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IPC IPC(8): E21B47/00E21B49/00
Inventor 刘君华汤晓君杨仁政赵安新李玉军
Owner XI AN JIAOTONG UNIV
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