RU1785568C - Method of collecting and transporting oil well production - Google Patents

Abstract

SUMMARY OF THE INVENTION: oil is received and pumped out of a reservoir, light fractions are compressed, compressed and compressed through a gas pipeline to a consumer. A steam-air mixture taken from reservoirs is mixed with hydrocarbon gas from a gas pipeline in a turbulent mode in the ratio of hydrocarbon components to air of 1: 2.33. 1 sludge :,

Description

The invention relates to the non-tegaz industry, in particular to systems for collecting, transporting oil, condensate and can be used in other sectors of the national economy, where operations are carried out to receive into tanks, "injure and dispense volatile liquids"

A known method of collecting and transporting oil well products, including the operations of receiving and pumping oil from tanks, trapping light fractions, compression and supply to the consumer

The closest in technical essence to; The present invention provides a method comprising receiving and pumping oil from reservoirs, trapping light fractions, compression and. and gas feed

The disadvantages of both the analogue and the prototype include the need to purge the vapor volumes of the reservoirs from air to replacement by air and the associated losses of a significant amount of hydrocarbon para DOB into the atmosphere when the system starts up and restores its functioning after compressor shutdown “

This leads to significant material costs:

The aim of the invention is to reduce material costs and reduce harmful emissions into the atmosphere,

/ target is achieved by the described method, including operations

SL

3

collection and withdrawal of non-oil from reservoirs, trapping of the leg Fractions, in-line and supply through the gas pipeline to the consumer

What is new is that the steam-air mixture taken from the tanks is mixed with hydrocarbon gas from a gas pipeline in a turbulent retina in the ratio of hydrocarbon components to air 5.1: 2.33,

The drawing shows fundamentally with; implementation of the proposed method,

The method is carried out in the following sequence d

Oil flows through pipeline 1 to reservoirs 2, and then, upon completion of the receiving, processing and .1 operations, the duration of which is, depending on the specific conditions, from a few hours to several days, through pipeline 3 it is sent for further processing or to the consumer. Light fractions separated in the reservoirs are transferred to the vapor volume, and as the partial pressure increases, they are mixed with air to form a vapor-air mixture of light hydrocarbons. The latter enters with a non-cement-rich hydrocarbon mixture (from 0 to 100 °,) to the gas inlet

4 y, equipped with fenders

5 and bursting diaphragm 6 “Heavy hydrocarbons and moisture condense on the baffle surface, then drain into the tank, and the steam-air mixture is piped through 7 to the separator-condensate collector 8, the condensate separated by pump 9 through the condensate pipeline 10 is pumped out to oil pipeline 1, and the vapor-air the mixture through pipeline 11 enters the intake of compressor 12, is comprined, and through pipeline 13 enters the mixer 14, into which hydrocarbon gas is supplied from gas pipeline 15 through a control valve 16, where the tape soluble is intensively mixed in a ratio that ensures its vapor content

tee and air

h 2.33, The concentration of hydrocarbon components in the gas-air mixture is monitored with an analyzer 17. When the ratio of hydrocarbon and air concentrations reaches 1.33, kapan 16, the flow decreases

I

10

fifteen

73556Я4

gas from the gas pipeline 15. If the hydrocarbon concentration drops below the permissible one, determined on the basis of the calculation of the upper ignition limit, a signal is sent from the analyzer 17 to increase the opening of the valve 16 обеспечива providing additional intake of hydrocarbon gas and thereby increase its concentration in the mixer 1 to the set; The final mixing of the gas and the air-vapor mixture is completed in line 18, from where it is sent to the consumer.

The ratio of the concentration of hydrocarbons and air in the gas-air mixture was determined by analyzing the ignition limits of gases and oil vapors and ensuring the safe operation of systems and vehicles and use.

The proposed method was tested at one of the oil pumping stations, which included 6 tanks GVS-500P, equipped with a gas equalization system, a unit for compressing light fractions and preparation for use in the boiler’s gas supply system, the volume of oil pumping was about UYOO t / day “ The oil density under normal conditions is: - conditions: it was 852 kg / m. The main volume of oil was pumped in transit, 20-30 ° of its total mass went into reservoirs, the pressure in the vapor volume of the reservoirs was kept to the limit. - AOO-110 Q Pa. The light fractions emitted in the reservoir were redistributed between the vapor volumes of the reservoirs according to the gas-equalizing subject, and excesses were transferred to separator-condensate collector 8

25

thirty

35

40

I have compressor 1

in which kompr5

0

5

multiply up to 0, 15-0.2 MPaSabs.) and were fed into the pipeline 13, and then to the mixer 1, the Judas was simultaneously fed natural gas (methane) in an amount of 2-100. The gas-air mixture was kept in a turbulent flow for 30 s and, at a concentration of hydrocarbon gases of 30-60, was supplied to the boiler room of the oil pumping station. Since the gas from the gas pipeline mainly consisted of methane on E5-9biv1, the ignition limits of the gas-air mixture and the ratio of its concentration in the mixture with air were specified for this component I 1: 2,331 The air content in the pore-air mixture coming from the tank changed R limit1 39-53С-, and hydrocarbon, respectively,

Thanks to the use of a low hydrocarbon concentration in the gas-air mixture capture system, a reduction in the losses incurred and harmful by atmospheric emissions by 15.5 t / s was achieved. In view of the more complete combustion of gas in the boiler room, which was enhanced by the preparation of the gas-air mixture, the gas flow, taking into account the flow of light fractions, was reduced by

Technique - economic indicators of the proposed method in relation to the oil pumping station with a pumping volume of 8000 tons / day are given in table „

The table shows that the application of the proposed method allows juice 855686

Reduce oil loss by evaporation by 97 °. (according to the prototype by 25 g), to reduce harmful emissions into the atmosphere by 7.8 thousand tons / g, to reduce the amount of natural gas for heating to 700 thousand, me / g. Forms of the invention

n The method of collecting and transporting oil wells products, including the operations of receiving and pumping oil from the reservoir for trapping light fractions, is compressed and the gas supply to the consumer is also characterized by the fact that, in order to reduce material, costs and reduce harmful emissions into the atmosphere taken from steam-air tanks

20, the mixture is mixed with a hydrocarbon lawn from a gas pipeline in a turbulent soluble in the ratio of hydrocarbon components and air 1: 2.33.

1. The volume of pumped oil, thousand tons / day 8,000

Z. Reduce oil losses

from evaporation, t / day 8.3

t / g

 gas in the boiler room.

thousand

.m3 /

3029

730

. Reduction of harmful emissions into the atmosphere, thous., T / g 8.3

B. Economic: th eifect, thousand rubles / g

eleven

2

0

8tOOO

15,5

5657

IN

16.1

460

100

52

52

100

100

97

97

100

209