Shell Orion Phase 1 is a steam assisted gravity drainage (SAGD) facility which consists of the central plant site and several well pads in the surrounding area. The equipment on the central plant site is mainly housed within buildings and enclosures and consists of water treatment, steam generation, and oil processing facilities.
SCOPE OF WORK
INNOVA found that the plant had a low-frequency noise condition that did not comply with the ERCB Directive and provided Shell with mitigation options. INNOVA was asked to supply and install an acoustical boiler building enclosure: 79’x50’x36’ and replace the glycol and produced gas cooler fans and drives. The Orion plant low-frequency noise level fluctuated between 22-25 dB during the night.
Alberta Energy Resources Conservation Board (ERCB) - Directive 038: Permissible sound level: 40 dBA and Low-frequency noise level: 20dB
- One (1) Produced Gas Trim Cooler
- One (1) Glycol Cooler
- One (1) Boiler
- Acoustical Boiler Enclosure
- Acoustical Fans for Produced Gas Trim Cooler
- Acoustical Fans for Glycol Cooler
UNIQUE PROJECT HURDLES
INNOVA encountered a phenomenon with the blade pass frequency in the fans that created a sound similar to “beating”, causing the low noise frequency to fluctuate 10 dB every few minutes. INNOVA found that the “beating” was due to the slightest difference in speed in which the fans were running. INNOVA had to synchronize the speeds of the fans to allow for compliance.
INNOVA designed the acoustical treatment to meet an overall sound level of 36dBA at the nearest sensitive receiver. With INNOVA’s upgrade and recommendations, the low-frequency noise is reduced to 20 dB which meets the requirements of the Alberta Energy Resources Conservation Board (ERCB) Directive 038.