Collector capable of automatically controlling gas separation for measuring production profile of oil well

Abstract

The invention discloses a collector capable of automatically controlling gas separation for measuring a production profile of an oil well. The main working parts of the collector comprise an oil-water collecting channel (2), a gas separation outlet (3), a gas separation channel (4), a collecting umbrella (5), a gas separation inlet (6), a float switch (7), a booster spring (8) and an oil-water phase collecting inlet (9); the collector structurally comprises a gas-phase separation cavity, the gas separation channel, the float switch for controlling the gas-phase separation, and an oil-water collecting channel. By separating the gas phase under the controllable conditions with the invention, the simple two-phase flow substitutes for the complex tri-phase flow, therefore, the measurement results are more accurate.

Description

Technical field: [0001] The patent of the present invention is applied to the field of oil field logging, and is used for the automatic control of the gas separation type collector used for the measurement of the oil well production profile. Background technique: [0002] The purpose of oil well fluid production profile measurement is to understand the oil and water production status of each production layer of the oil well. For oil wells, oilfield geology is concerned with the oil production and water production of the oil well, and the production of the oil well does not include the gas phase. At present, the domestic oil well liquid production profile measurement mainly adopts the flow-collecting measurement method. After the flow is collected, the fluid in the oil well casing enters the flow-collection measurement channel. Due to the reduction of the formation pressure, the fluid in the domestic oil well casing is already oil, gas, and water. In the state of three-phase ...

AI Technical Summary

Problems solved by technology

At present, the domestic oil well liquid production profile measurement mainly adopts the flow-collecting measurement method. After the flow is collected, the fluid in the oil well casing enters the flow-collection measurement channel. Due to the reduction of the formation pressure, the fluid in the domestic oil well casing is already oil, gas and water. In the state of three-phase coexistence, due to the significant difference in physical properties between the gas phase and the liquid phase, the flow state of the three phases of oil, gas, and water is extremely complicated. At present, various technical methods through total flow measurement and phase-separated holdup measurement have failed. Solving this measurement challenge

Various existing technologies for two-phase flow measurement, due to the existence of gas phase in oil wells, the measurement results deviate greatly from the actual situation, and sometimes the measurement even loses meaning

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