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Natural Gas Exploration and Development >

2025 , Vol. 48 >Issue 2: 135 - 145

DOI: https://doi.org/10.12055/gaskk.issn.1673-3177.2025.02.013

OIL AND GASFIELD DEVELOPMENT

Noise analysis and control for single-well stations of high-pressure and high-yield gas wells: A case study of MX gas field

  • JI Weian , 1 ,
  • WEN Dongyun 2 ,
  • GAO Xiaogen 2 ,
  • WU Guopei 1 ,
  • ZHANG Zhi 1 ,
  • PAN Hong 3
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  • 1. Research Institute of Natural Gas Gathering and Transmission Engineering Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610041, China
  • 2. Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610213, China
  • 3. Northeast Sichuan Gas District, PetroChina Southwest Oil & Gasfield Company, Dazhou, Sichuan 635000, China

Received date: 2024-09-29

  Revised date: 2024-12-23

  Online published: 2025-04-30

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Abstract

In order to reduce the intense noise generated by the throttling at the wellhead of high pressure (usually corresponding to high yield) gas well, diminish its hazards to well site and the surrounding environment, maintain the physical and mental health of personnel and meet the requirements of environmental protection authorities for noise pollution control standards, this paper analyzed the causes and influencing factors of noise, and explored the noise control methods, by combining computational fluid dynamics (CFD) simulation with field test, based on the investigation on MX gas field. The following research results have been obtained. (i) The noise at a single-well station is mainly the jet noise generated by throttling at each stage and the noise generated by high-speed unstable gas flow. (ii) The gas pressure ratio before and after throttling point (hereinafter referred to as pressure ratio) is an important factor influencing noise: when the pressure ratio is less than the critical value (1.89), the noise is relatively low; whereas the pressure ratio is higher than the critical value, the noise is large, especially when the gas flow velocity reaches or exceeds the sound speed (supersonic), intense shock wave noise is generated to intensify the jet noise, resulting in high noise frequency. (iii) The targeted comprehensive noise control methods are proposed: for intense jet noise, the combination of pressure ratio regulation and sound arrester is adopted to keep the pressure ratio below the critical value during throttling; for high-speed unstable gas flow noise, the combination of local throttling stabilization and sound arrester is adopted; and for the plant boundary noise, the physical wall or sound insulation screen can be built to reduce the noise significantly. The research results provide theoretical support and practical guidance for the noise control of single-well stations of high pressure gas wells, and the green production of natural gas.

Key words： High pressure; Natural gas; Throttling; Pressure ratio; Gas flow velocity; Noise; Jet noise; Noise control; Noise reduction

Cite this article

JI Weian , WEN Dongyun , GAO Xiaogen , WU Guopei , ZHANG Zhi , PAN Hong . Noise analysis and control for single-well stations of high-pressure and high-yield gas wells: A case study of MX gas field[J]. Natural Gas Exploration and Development, 2025 , 48(2) : 135 -145 . DOI: 10.12055/gaskk.issn.1673-3177.2025.02.013

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