Oil field associated gas ethane recovery system

A technology of oilfield associated gas and recovery system, which is applied in the field of oilfield associated gas ethane recovery system, and can solve the problems of large energy loss and other issues

Active Publication Date: 2012-02-15
XIAN CHANGQING TECH ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the analysis, it can be concluded that the components above C3 in the raw material gas have been fully recovered, and the C2 components of the associated gas after treatment have increased by 0.49%, but they are all exported as lean gas, resulting in a large energy loss

Method used

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  • Oil field associated gas ethane recovery system
  • Oil field associated gas ethane recovery system
  • Oil field associated gas ethane recovery system

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Embodiment Construction

[0030] Oilfield associated gas ethane recovery system, including: feed gas pressurization unit, feed gas dehydration unit and low temperature fractionation unit, such as figure 1 as shown,

[0031] 1) Raw material gas pressurization unit: including five-stage centrifugal compressors, there is an air cooler between each two-stage centrifugal compressor, the raw material gas enters the raw material separator D0101 at 15.6°C, 0.15MPa, 69.3Kgmole / h, and removes the gas The water and other impurities brought in. After the raw material gas comes out of D0101, it enters five-stage centrifugal compressors respectively: C0101, C0102, C0103, C0104, and C0105 are pressurized in five stages, and the final pressure reaches 5.1MPa. The pressurized gas of each stage is cooled by air coolers E0101~E0104 respectively. The temperature of the gas coming out of each stage of air cooler is 38°C. The condensate in the gas is separated in D0102, D0103, D0104 and D0105 respectively. The liquid i...

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Abstract

The invention relates to an oil field associated gas ethane recovery technology, or relates to an oil field associated gas ethane recovery system. The system is characterized by comprising a feed gas supercharging unit, a feed gas dehydration unit and a low-temperature fractionation unit, wherein the temperature of a bottom product of the low-temperature fractionation unit is 29.38 DEG C, and the pressure of the bottom product is 1.75 MPa; the bottom product is conveyed to a storage tank region; required cold in an ethane recovery process of the low-temperature fractionation unit is completely provided by turbo-expanders X0301 and X0302; two flows of liquid are extracted out of a tower by the low-temperature fractionation unit to perform intermediate reboiling; and compressors C0104 and C0105 are driven by the turbo-expanders X0301 and X0302 respectively. A computation model which is subjected to cryogenic separation has design reference values of adjusting parameters in real time, optimizing parameters, improving yield, reducing energy consumption and the like for established or to-be-established cryogenic device.

Description

technical field [0001] The invention relates to a technology for recovering oilfield associated gas ethane, or to a system for recovering oilfield associated gas ethane. Background technique [0002] Oilfield associated gas recovery is a very important and common process in natural gas treatment and processing. In addition to methane, natural gas (especially associated gas and condensate gas) also contains a certain amount of ethane, propane, butane, pentane and heavier hydrocarbons. In order to meet the quality requirements of hydrocarbon dew point for commercial gas or pipeline gas transmission, or to obtain valuable chemical raw materials, it is necessary to separate and recover some hydrocarbons in natural gas except methane. In general, most oil fields use refrigerant refrigeration to recover heavy components above propane, and export ethane as lean gas, resulting in a great waste of energy. Therefore, the recovery of ethane in natural gas is of great significance in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C9/06C07C7/09
Inventor 王勇夏政王文武郭亚红何茂林
Owner XIAN CHANGQING TECH ENG
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