RU1773438C - Petroleum oil separator unit - Google Patents

Abstract

FIELD OF THE INVENTION This invention relates to the oil industry, in particular to oilfield gas collection, treatment and transport facilities. SUMMARY OF THE INVENTION: In order to reduce the loss of hydrocarbons by reducing the content of heavy components in the gas, the terminal phase divider is equipped with gas outlet pipes located on each section in front of the partition and connected to the gas outlet pipe of the coupler, and the partitions are made in the form of plates with a hole in the lower part. 2 ill.

Description

FIELD OF THE INVENTION This invention relates to the oil industry, in particular to high-pressure oil recovery units for the preparation, preparation and transport of oil and gas.

The purpose of the invention is to reduce the loss of hydrocarbons by reducing the content of heavy components in the gas.

The goal is achieved by the proposed installation, including an end phase divider. partitioned by vertical partitions; and a separator with a gas outlet pipe.

The terminal phase divider is equipped with gas outlet pipes located on each section in front of the partition and connected to the separator exhaust pipe, and the partitions are made in the form of plates with an opening in the lower part.

Figure 1 presents a diagram of the proposed installation: figure 2 - section aa in figure 1.

The installation includes a supply pipe 1, an end phase divider 2. divided into sections 3,4,5 vertical partitions 6 in the form of plates with holes 7 in the lower part, outlet pipes 8

gas located at the end of the section, with valves 9 connected through a common pipe 10c to the gas pipe 12 discharge from the separator 11 and a gas dryer 13. The separator 11 has an oil feed pipe 14 connected to an end phase divider and an oil output pipe 15.

Installation works as follows.

Gas oil to the mixture in an amount of 10,000 m3 / day with a gas factor of 50 m3 / m3 through the supply pipe 1 enters the terminal phase divider (KDF) 2, divided by vertical partitions 6 into three sections 3.4, 5, respectively. When the gas-oil mixture enters the first section 3 of the CDF, where the pressure of 0.8 MPa is maintained, the mixture is initially separated into gas and oil phases. The gas present in the mixture in the form of free gas, through the pipe 8 and the common gas pipeline 10, enters the gas pipe 12 discharge from the separator, and the oil with the residual content of free, occluded and dissolved gas through the opening 7 in the lower part with a diameter of 95 mm enters

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into the second section of CDF 4, where the pressure is maintained lower than in the first section, 0.6 MPa. In this case, a secondary separation of the mixture (separation) into gas and oil takes place. The gas evolved through the pipe 8 through the gas pipe 10 enters the gas pipe 12 leaving the separator and then to the gas dryer 13, and the oil again passes through the hole 7 in the lower part of the vertical partition with a diameter of 95 mm to the next, third section 5 of the KDF, where the pressure is maintained 0 4 MPa, and the pressure in the last section of the CDF is approximately equal to the pressure in the separator 12 and is determined by the pressure for transporting gas to the gas processing plant (consumer). This is where the final degassing of oil occurs. The gas released from the oil through the pipe 8 passes through a gas pipeline 10 to a gas pipe 12 which is discharged from the separator and then through a dryer 13 to a gas processing plant. The degassed oil is fed through line 14 to a separator 11. From there it is withdrawn via line 15 for further preparation. The presence of valves 9 on the nozzles 8. located on the end sections of the KDF sections, as well as the holes of the calculated diameter in the lower part of the vertical partitions, provides a predetermined pressure drop (0.2 MPa) when the oil moves from one stage to another, creating the condition for a gradual, stepwise degassing of gas oil mixture in one unit. The number of sections in the CDF and the size of the holes in the lower part of the partitions depend on the properties of the gas-oil mixture entering the CDF, in particular, on the pressure at the inlet of the CDF and the amount of gas

in her. For example, if the pressure of the gas-oil mixture at the inlet to the KDF is 0.6 MPa, and in the separator (transportation pressure at the gas treatment plant) is 0.4 MPa, then KDF can also

divided into 3 sections, maintaining a pressure of 0.6-0.5-0.4 MPa, respectively, with a pressure drop in each section of 0.1 MPa, while the diameter of the holes in the lower part of the vertical partitions increases

up to 110 mm

The gas yield at the facility decreases to 284.0 t / day, which is due to a decrease in the content of heavy hydrocarbons (C3 + sup) in the gas to 20.90 wt.%. The molecular weight of the gas after degassing the oil is 19.5. At the same time, gas losses in the gas pipeline (in the form of condensate) during transportation to the gas treatment plant are reduced to 0.41 kg per 1 ton of gas-oil mixture.

It follows from the foregoing that the use of an oil separation unit reduces the loss of hydrocarbons by preserving them in the oil phase.

Claims (1)

The claims Installation for oil separation, including an end phase divider, partitioned by vertical partitions, and a separator with a gas outlet pipe, characterized in that, in order to reduce hydrocarbon losses by reducing the content of heavy components in the gas, the end phase divider is equipped with gas outlet nozzles, located on each section in front of the partition and connected to the separator exhaust pipe, and the partitions are made in the form of plates with an opening in the lower part. figure 2