METHOD OF MEASURING WELL PRODUCTION AND FACILITY FOR IMPLEMENTATION OF THIS METHOD Russian patent published in 2009 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil production and can be implemented for operative production record of oil and gas condensate wells in systems of pressure sealed gathering. The method of measuring well production consists in filling a vertical cylinder measuring capacity with well production at a specified time at open to a collector gas line and at a closed fluid drain line. When the capacity is filled, supply of well production into the measuring capacity is stopped; well production is conditioned to a state, when gas bubbles and foam sedimentation disappear completely. Further at known excess pressure and temperature the height of fluid column and hydro-static pressure are measured and production rate for fluid, oil and water is calculated. The ratio of oil and water is determined on base of their density values. Density of water and oil is measured in the cavity of the lower part of the capacity connected to the fluid drain line. Density of water is measured after filling the measuring capacity at closed fluid drain line after stabilisation of density metre readings. Density of oil is measured either at the open fluid drain line after stabilisation of density metre readings or after closing the fluid drain line, when surface of contents of the measuring capacity is approaching the upper boundary of the cavity. Replacement of fluid from the measuring capacity via the fluid drain line is performed avoiding ingress of additional portion of fluid into the measuring capacity under effect of a pump or separated associated gas. In the lower portion the measuring capacity is equipped with a vertical cylinder branch with an additional sensor of hydro-static pressure. A multipurpose valve is installed on the fluid drain line. The gas line of the separator is connected with a bypass line from a flow switch to the collector and is equipped with a pressure regulator and the hydro-static pressure sensor.

EFFECT: upgraded accuracy of measuring oil and water production by means of facilitating direct measurement of oil and water density during well production measuring.

4 cl, 1 dwg