METHOD OF DETERMINING EXCESS FRACTION OF LIGHT OIL FORMED DURING TRANSPORTATION AND PREPARATION OF OIL-GAS-WATER MIXTURE AT OIL TREATMENT AND PUMPING UNITS Russian patent published in 2024 - IPC G01N33/22 G06F30/20 F17D1/08 

FIELD: oil, gas and coke-chemical industry.

SUBSTANCE: invention relates to oil and gas processing industry. Disclosed is a method of extracting excess fraction of light oil (LO) formed during transportation and preparation of oil-gas-water mixture at oil treatment and pumping units. To implement the method, the light oil formed during the collection, transportation and preparation process is mixed with oil at a saturated vapor pressure of not more than 66.7 kPa, and in case of formation of LO excess, which leads to pressure of saturated vapours of more than 66.7 kPa, LO is removed from the technological process. In order to determine the amount of LO removed from the process, computer simulation of mass exchange processes of contact degassing and fractionation of multicomponent mixtures is carried out taking into account the compositions of the raw material, actual loads and process parameters of oil and low-pressure gases treatment. Further, using the equation of state of PengRobinson, which is optimized for interaction of polar and non-polar components, initial data of the components are determined. Then, LO balance is formed in total composition of oil and gas-water mixture and excess LO fraction is calculated. After that, the technology of closed supply of LO to the oil treatment system is replaced by the technology of separation of LO flows: first flow is returned to treatment system, which is the “head” of process, and excess portion is extracted and sent for processing as raw material for petrochemical industry.

EFFECT: determination of excess fraction of light oil (LO) as an additional product formed during transportation and preparation of oil-gas-water mixture (OGWM) at oil treatment and pumping units (OTPU), as well as reduction of energy, material costs, provision of stabilization of operation of dynamic equipment at OGWM and multi-well pads, reduction of emission into environment.

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