2. S OUTH R OCKIES B USINESS U NIT Gas Gathering n Two typical types of compression.  Gas Driven: Can be set as Permanent, or Temporary  Electric Driven: Normally a Permanent Installation

3. S OUTH R OCKIES B USINESS U NIT Gas Gathering Temporary Gas Compression

4. S OUTH R OCKIES B USINESS U NIT Temporary Gas Driven Compression Gas Gathering

5. S OUTH R OCKIES B USINESS U NIT Gas Gathering Rig Counts: North Parachute - 10 Rigs Eureka - 2 Rigs Permanent Indoor Gas Compression

6. S OUTH R OCKIES B USINESS U NIT n Compressor Gas Cooler Fans (Air Exchangers)  Air exchanger fan blades are one of the biggest source of noise from the fan tip speeds.  EnCana is looking at having bigger exchanger boxes installed on new applications, to be able to slow the fan tip speeds down  One new innovation is the new “Whisper Tip” fan blades. These new fan blades cut the sound level in half. Gas Gathering

7. S OUTH R OCKIES B USINESS U NIT Gas Gathering Different Types of Coolers – Vertical and Horizontal Permanent Indoor Gas Compression

8. S OUTH R OCKIES B USINESS U NIT Gas Gathering Permanent Gas Compression Horizontal Coolers with Extensions to Mitigate Sound

9. S OUTH R OCKIES B USINESS U NIT Gas Gathering Permanent Gas Compression 3 Horizontal Coolers with Extensions to Mitigate Sound

10. S OUTH R OCKIES B USINESS U NIT Gas Gathering  Electric Compression  Electric driven compression has no exhaust, but requires cooling of the gas with horizontal air fan exchanger.  Limitations are power supply requirements and installation costs

11. S OUTH R OCKIES B USINESS U NIT Gas Gathering 7500 Hp Electric Compression

12. S OUTH R OCKIES B USINESS U NIT Gas Gathering 1500 Hp Electric Refrigeration Compression

13. S OUTH R OCKIES B USINESS U NIT Gas Gathering n EnCana uses two different muffler manufacturers.  Power Therm---The Power Therm’s are a “Critical Grade” muffler, which is a reduction of 29-35 Dba.  Miratech---The Miratech’s are listed as a “Hospital Grade”, which is a reduction of 30-35 Dba.  Muffler stacks are normally cut on a bevel to direct sound to the most desirable direction.

14. S OUTH R OCKIES B USINESS U NIT Gas Gathering Typical Muffler Design. Most have a Catalyst section for emission control, and can either lay horizontal, or stand vertical

15. S OUTH R OCKIES B USINESS U NIT n What is Encana doing to reduce compressor noise  EnCana is currently exploring several new technologies for sound control.  EnCana is using third party sound suppression experts to help us better understand how sound travels, and the different sound frequencies Gas Gathering

16. S OUTH R OCKIES B USINESS U NIT Gas Gathering

17. S OUTH R OCKIES B USINESS U NIT Gas Gathering