SU1728476A1 - Control and adjustment technique for gas and gas-condensate wells - Google Patents

Abstract

The invention relates to the gas industry and can be used to monitor and regulate the mode of operation of wells. The purpose of the invention is to increase the reliability of monitoring and controlling the well mode. The method includes installation at the wellhead of a separator with restricting devices before and after it. The results of measurements of pressure drops on the constriction devices are used to regulate the modes of operation of wells. Due to the significant differences in the values of pressure drops on the constricting devices of single-phase and two-phase media, the reliability of the control and regulation of the well operation mode is increased. 1 hp ff. 1 il.

Description

The invention relates to the gas industry and can be used to monitor and regulate the mode of operation of wells,

There is a known method for detecting violations of the mode of operation of a production well in a group collection system based on measuring the pressure in the flow line.

The disadvantage of the method lies in its low reliability, since measuring the pressure drop across the line has a significant error due to the effect on the measurement results of the accumulated fluid.

The purpose of the invention is to increase the reliability of control and regulation of the well operation mode.

The essence of the invention is that the control and regulation of the operation of gas and gas condensate wells, including the measurement of the pressure drop across

devices, gas from the wellhead is passed through a separator with restricting devices at its inlet and outlet, pressure differences are measured at the constricting devices and, according to the ratio of these differences, the modes of operation of the well are controlled without removal of produced water, and the liquid from the separator is discharged narrowing device installed on the purified gas stream.

The drawing shows the implementation of the proposed method.

The scheme includes a pipeline 1 from the wellhead, a restriction device 2, a pipeline 3, a separator 4 with a condensate collector 5, a restriction device 6, a signal ratio block 7, a control valve 8 and a loop 9. The condensate collector 5 has a condensate discharge line 10 and a sensor level 11 associated with controller 12

one

to

OS 4 4, O

level and control valve 13 on the pipe 14 of the condensate discharge.

Monitoring and regulation of wells is carried out as follows.

Gas enters the wellhead through pipeline 1 into the restriction device 2 and further along pipeline 3 into the separator 4, where it is separated in the condensate collector 5, and then enters the restriction device 6. The measurement results of pressure drops in the restriction devices 2 and 6 enter the block 7 ratio signals, which controls the valve 8. If the difference between the signals exceeds a predetermined value, then valve 8 is covered by an amount that limits the flow of fluid. From the condensate collector 5, the liquid is discharged along the condensate discharge line 10 by means of the valve 13 of the regulator 12. which is turned on from the level sensor 11.

Condensate through the condensate discharge line 14 may be introduced into loop 9.

Gas separation allows for a clear separation of pressure drops by

narrowing devices with single-phase and two-phase media, which will increase the reliability of the well control system.

FORUMAWLAH AND ISLANDS

Claims (2)

1. Method of control and regulation of gas and gas condensate wells, including measurement of pressure drop across a restriction device, characterized in that, in order to increase the reliability of monitoring and adjusting the mode of operation of a well, gas from the wellhead passes through a separator with constricting devices at its inlet and outlet, pressure drops are measured at constricting devices and according to the ratio of these differences they regulate the modes of operation of the well without transporting produced water. 2. Method pop. 1, characterized in that liquid from the separator is discharged into the gas pipeline after the restriction device installed on the purified gas stream;