Method for measuring daily output of oil field gas

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...

AI Technical Summary

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 can only measure the flow rate of one well a day, and the use efficiency of the measurement equipment is also low; The work efficiency of personnel is also very low, resulting in higher labor costs

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