METHOD AND DEVICE FOR MEASURING OIL DEBIT Russian patent published in 2004 - IPC

FIELD: oil extractive industry.

SUBSTANCE: method includes feeding gas-water-oil mixture into measuring tank, separation of it onto gas and oil-water mixture in form of emulsion, measuring of oil-water mixture debit on basis of speed of filling of calibrated portion of this tank and draining oil-water mixture with periodicity, determined by intensiveness of product feeding by certain well, calculation of water share and oil share in liquid phase of this product on basis of measured value of oil-water mixture density and known values of bed water density and degassed oil density, and following calculation of oil debit. Except calibrated portion of measuring tank, detaining chamber is filled with oil-water mixture at given periodicity, said mixture is detained for some time, after that density of detained oil-water mixture is measured with following draining of said chamber. Delay time is determined by controlling degree pf emulsion destruction on basis of intensiveness of change of output signal value from density converter. Lowering pf leveling detaining chamber during process of emulsion destruction and gas separation is compensated by adding fresh emulsion when filling calibrated portion of measuring tank during process of measuring debit of oil-water mixture. Device has input pipeline, measuring tank having a separating element in upper portion and equipped for measuring level or mass of oil-water mixture by one or several hydrostatic pressure converters, output pipeline, equipped with switching armature, and pipelines for by-turn draining of liquid and gas into output pipeline from measuring tank. Additionally device is provided with detaining chamber made in form of vertical cylinder and provided by one or several hydrostatic pressure converters for measuring density, and connected to measuring tank by upper and lower pipelines equipped with locking armature.

EFFECT: higher precision of debit measurement in wells, product of which forms stable emulsion.

2 cl, 1 dwg