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Process and system for reheating and exporting in high-pressure gas fields using high-efficiency heat exchangers

A heat exchanger and high-efficiency technology, which is applied in the field of rewarming and external transfer processes and systems, can solve the problems of energy waste, external transfer pressure reduction, consumption, etc., so as to delay the timing of pressurization and dehydration, reduce production and operation costs, The effect of simple transformation process

Active Publication Date: 2018-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] There are some defects in the above two methods to varying degrees: 1. Although the problem of substandard dew point or lower export pressure caused by the pressure drop of the gas well in the gas field can be completely solved, it needs to consume external energy to realize it; 2. Adding dehydration devices and supercharging devices is a complicated transformation process, and the initial investment and later maintenance costs are relatively high
3. The cooling capacity generated by throttling and dehydration is gradually consumed in the gas field pipeline network, resulting in a waste of energy

Method used

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  • Process and system for reheating and exporting in high-pressure gas fields using high-efficiency heat exchangers
  • Process and system for reheating and exporting in high-pressure gas fields using high-efficiency heat exchangers
  • Process and system for reheating and exporting in high-pressure gas fields using high-efficiency heat exchangers

Examples

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Embodiment 1

[0030] Embodiment 1, in conjunction with attached figure 1 , figure 2 , image 3 , Figure 4 , to further describe the present invention:

[0031] According to this embodiment figure 2 The process flow shown is carried out, figure 2 It is a schematic flow chart for the gas gathering station of the conventional high-pressure gas gathering process to achieve the water dew point of the exported natural gas to meet the standard and delay the timing of pressurization by reheating and exporting the gas gathering station.

[0032] A high-efficiency heat exchanger mentioned in the present invention is used to complete the reheating and exporting system in a high-pressure gas field, including a production separator (D1), a cyclone separator (D2), an oil-water buffer tank (D3), and a high-efficiency heat exchanger ( E1), heating furnace (H1), the gas well (D) is connected to the production separator (D1) through the valve, the heating furnace (H1) is installed between the produc...

Embodiment 2

[0034] Embodiment 2, in conjunction with attached Figure 5 , to further describe the present invention:

[0035] This example follows Figure 5 The process flow shown is carried out, Figure 5 is in figure 2 The high-pressure gas-gathering station used is adjusted on the basis of the process flow. The difference from Example 1 is that the above-mentioned throttle valve (F) is externally connected to the external cooling unit (Z2), and the top of the above-mentioned cyclone separator (D2) is connected to the A compressor unit (Z1) is installed on the pipeline, and the natural gas is exported after passing through the compressor unit (Z1).

[0036] The present invention is mainly through the application of rewarming and external transportation process and the stage of gas well production later stage, and the stage of small station pressurization has been implemented. After the gas-gathering station implements reheating and external transportation process and small station ...

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Abstract

The invention relates to a process and system for completing rewarming exportation in a high-pressure gas field by utilizing a high-efficiency heat exchanger. The process comprises the following steps: firstly additionally arranging the high-efficiency heat exchanger at a gas collection station; secondly, taking natural gas at an outlet of a first-level production separator (D1) as raw material gas at an inlet of a heat end of the high-efficiency heat exchanger, taking the dehydrated natural gas of a second-level production separator (D2) as inlet gas at a cold end of the high-efficiency heat exchanger, and carrying out the heat exchange in the high-efficiency heat exchanger; finally by virtue of the heat exchange, recovering cold quantity in exported natural gas to be used for cooling the raw material gas at the inlet of the heat end of the high-efficiency heat exchanger, so that the pressure required by the second-level production separator (D2) is reduced, and the water dew point dehydration depth requirement can be realized by virtue of small pressure difference. The process and system have the beneficial effects that the required pressure for dehydration can be successfully reduced only by additionally arranging one high-efficiency heat exchanger, the supercharging and dehydration opportunities of the gas field can be successfully postponed, the transformation flow is simple, the impact on original process flows in the station is small, and the process and system have various advantages of simplicity, energy conservation, economical performance and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas processing engineering, in particular to a process and system for completing reheating and external transportation in a high-pressure gas field by using a high-efficiency heat exchanger. Background technique [0002] "Single well enters the station at high pressure, heating and throttling in the station, low temperature refrigeration and dehydration" is a commonly used gas gathering process for gas gathering stations in high pressure gas fields. The high-pressure gathering and transportation process utilizes formation energy throttling and refrigeration dehydration to achieve the effect of energy saving and consumption reduction; through two-stage throttling and low-temperature separation and fine dehydration, the water dew point of the exported natural gas is reduced, so that the treated natural gas for export reaches GB17820 " "Natural Gas" is a standard for a class of temperam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L3/10F17D1/02F17D3/14
Inventor 王明军卫振锋刘祥祺毕春玉胡文涛黄予平陈俊亮
Owner CHINA PETROLEUM & CHEM CORP