Case Studies: Petrochemical and Gas

Eskene West Processing Plant, Kashagan Field Onshore, Kazakhstan

This is the onshore oil and gas processing plant associated with the giant Kashagan offshore field in the Caspian Sea. Spectrum was appointed by Operator AGIP-KCO to undertake specialised noise and vibration studies early in the project, post-FEED. The work involved evaluating Kazakhstan National Guidance and Laws on noise and incorporating these into project specifications. Initial noise modelling of the whole plant was undertaken to establish the noise footprint of the project.

Oman Methanol Company LLC, Sohar, Oman

Ferrostaal GmbH called in Spectrum to help identify and solve a problem of high flow noise in excess of 100dBA over large sections of this methanol plant. The study involved site measurements and meetings with key process engineers and operators of the plant. The study concluded that the plant was operating slightly differently to its design resulting in a valve normally closed, having to routinely control flow. Spectrum recommended a series of options to mitigate noise and outlined in-line diffuser and valve trim silencing measures.

EDF Energy Hole House Gas Storage, Warmingham, UK

EDF operate the Hole House Gas Storage facility in Cheshire, UK, where gas is stored in underground caverns formed following the extraction of salt. Spectrum undertook detailed noise modelling and noise control design of the Phase 3 Expansion Project for AMEC and also supported EDF Energy in their application for a variation to their Environmental Permit for the site.

E.ON Holford Gas Storage, Byley, UK

On commissioning this gas storage facility E.ON found that noise levels to the community were higher than expected and contained strong tonality associated with the main gas compressors. They called in Spectrum to undertake on plant noise measurements and develop a noise propagation model for the site. Strong sources were identified as some of the piping systems, and Spectrum identified a programme of noise mitigation to be installed and supported E.ON in selecting suitable insulation systems. Once treated, both the noise levels and tonal content had reduced to acceptable values.

EQUATE Petrochemicals, Kuwait

One of the largest petrochemicals complexes in the middle east is owned and operated by EQUATE. Spectrum have undertaken a number of noise control studies over the years, most recently on the feasibility of reducing noise from compressors located around the site. The units ranged between 1MW-10MW in size, with noise levels ranging up to 115dBA at some locations. Options for noise reduction were presented and are under consideration for engineering feasibility and implementation.

QQGC/BG Group Queensland Curtis LNG Project

Spectrum were instructed by QGC (subsidiary of BG Group Plc) to advise on BAT (Best Available Techniques) for a fleet of new and existing on-shore CSG (Cold Seam Gas) drilling and completion rigs, and hydraulic fracturing equipment, associated with their developments in the Surat Basin, Eastern Australia. Spectrum surveyed operating rig-sites to establish source sound power levels and developed sound attenuation proposals for new rigs under construction. We also visited rig builders in North America and worked through strategies for implementing improved noise control measures.