Method for measuring daily output of oil field gas

A technology of petroleum associated gas and measurement method, which is applied in the field of petroleum associated gas production, can solve the problems of low work efficiency of measurement personnel, low efficiency of measurement equipment, and low measurement efficiency, so as to save labor costs, shorten measurement time, and improve measurement efficiency. efficiency effect

Active Publication Date: 2014-12-10
荆州市明德科技有限公司
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Problems solved by technology

However, this measurement method has many defects: the casing gas production of each oil well needs to be measured for one day to obtain, and the measurement efficiency is very low; each flow meter

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  • Method for measuring daily output of oil field gas

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Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0029] figure 1 It is a schematic diagram of the pipeline of the method for measuring the daily output of petroleum-associated gas provided by the specific embodiment of the present invention, and the outer part of the oil pipe 1 is provided with a casing 2 . The daily oil-associated gas production measurement method includes at least the following steps:

[0030] Step A. Empty the associated gas in the casing of the oil well under test, and then hold the pressure for Δt, and the Δt is greater than or equal to 8 hours;

[0031] Step B: After the pressure is suppressed, the associated gas in the oil well casing is detected to obtain the first pressure value p of the gas 1 , the first temperature value T 1 , where the first pressure value p 1 is the absolute pressure value;

[0032] Step C. Disch...

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Abstract

The invention discloses a method for measuring the daily output of oil field gas. The method is designed to solve the problems of low measurement efficiency, the high labor cost and the like in the prior art. According to the method, the oil field gas of a measured oil well sleeve pipe is emptied, and then pressure build-up is carried out for the time of delta t; the oil field gas in the oil well sleeve pipe is detected after pressure build-up is finished, and a first pressure value p1 and a first temperature value T1 of the gas are obtained; at least part of the oil field gas in the sleeve pipe is discharged, the oil field gas in the sleeve pipe is detected a second time after gas discharging is finished, a second pressure value p2 and a second temperature value T2 of the gas are obtained, and the gas discharging amount delta Vsta of the sleeve pipe between the first time of measurement and the second time of measurement is recorded and worked out; the daily output value Q of the oil field gas is calculated through a calculation formula derived from an ideal gas state equation according to parameters obtained from the above steps. The measurement time of the method is about one tenth that of a common method, the measurement efficiency is largely improved, the use efficiency of a flow metering device is improved, and the labor cost is reduced.

Description

technical field [0001] The invention relates to the field of oil-associated gas output, in particular to a method for measuring the daily output of oil-associated gas. Background technique [0002] During the entire oil extraction process, some natural gas will be dissolved in the oil. When the pressure is gradually reduced during the extraction process, the natural gas will usually be separated from the extracted oil, that is, oil-associated gas, also called crude oil-associated gas. And some of the gas is also pumped out along with the well fluid, and the other part will enter the annular space in the production casing, and finally form the casing associated gas, referred to as casing gas. If these natural gas resources are not recovered effectively, on the one hand, as time goes on, the amount will increase, which will lead to a serious waste of resources; on the other hand, it will also pollute the surrounding air. The natural gas in the pipeline is used by criminals wi...

Claims

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Application Information

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IPC IPC(8): E21B47/00
Inventor 孟浩周亚东宋根才王德山邓卫东袁伯利赵雷李南春雷钧戴群特
Owner 荆州市明德科技有限公司
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