OIL, GAS AND WATER IN OIL DEPOSITS WELLS FLOW RATES MEASURING METHOD Russian patent published in 2019 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry and can be used in order to determine the gas factor of oil, as well as oil and water flow rates of oil wells. Method comprises the oil well production entering into the measuring tank with calibrated part, its separation into a gas and liquid phases, the liquid flow rate measuring according to the tank calibrated part filling rate and oil and gas flows switching using the piston. At that, the piston is hermetically placed in the tank calibrated part, in which, when it reaches the upper extreme position under the incoming product pressure the passage channel opens, allowing the piston to move further down under its own weight, exceeding the resistance to its movement, and passing the measured medium through itself. When it reaches the lowest position under the piston gravity action, the passage through the channel closes and the piston begins to move upwards under the pressure coming from the bottom into the well production measuring tank. At that, the well total production flow rate is calculated from the time of piston movement from the lowest to the extreme upper positions and the volume described by the piston during this period. Measured product quantitative composition is determined by taking its sample from the height of the measuring tank calibrated part into the sampling chamber upon reaching the piston in the tank extreme upper position, its subsequent discharge from the chamber lowest point and measuring the oil and water being drained volumes, as well as their density, at that, the gaseous phase in products volume is calculated by both liquids volumes subtraction from the chamber entire internal volume.

EFFECT: technical objective of the proposed method is to ensure the oil, water and gas flow rates measuring possibility at free gas various concentrations in the measured product, including at its complete absence.

1 cl, 3 dwg