Production Correction of Associated Gas in Offshore Oil Field and Its Significance

Abstract

Abstract: Offshore oil and gas fields generally use oil-gas metering separator to measure the associated gas of oil wells,but the natural gas production measured by this method often ignores the associated gas dissolved in crude oil. The upstream metering results are difficult to truly and effectively reflect the actual associated gas production,and there is a large error with the natural gas production received by the downstream terminal. In this case,the measurement result of associated gas is lower than the actual situation,and it is possible that the mixed transportation pipeline and production and treatment equipment exceed the design without knowing it,which has potential safety hazards. Through literature research,this paper obtains the relationship of natural gas solubility under different pressures and temperatures,calculates the solubility of associated natural gas in crude oil under the operating conditions of oil-gas metering separator,and then obtains the volume of associated natural gas dissolved in crude oil,and corrects the coefficient of associated natural gas production through the calculation results,so as to reflect the actual associated gas production more accurately.

Key words: offshore oil and gas fields, natural gas solubility, dissolved gas-oil ratio, associated natural gas production

CLC Number:

TE83

CHEN Jia, LUO Yang, HU Hongliang. Production Correction of Associated Gas in Offshore Oil Field and Its Significance[J]. TIANJIN SCIENCE & TECHNOLOGY, 2023, 50(2): 16-19.

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