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Impact of Surface Facilities on Addressing Liquid Loading Breakout Session

This breakout session discusses the effects of surface facilities on addressing liquid loading in gas wells. Topics include downhole skin effects, surface restrictions, and pressure losses. The session also covers flow behaviors in flowlines and tubing, as well as the use of rotary screw compression and single well plunger lift systems. Key takeaways include the need for communication and collaboration between field and compressor operators, proper design for liquid accumulation in flowlines, and the potential benefits of creative applications.

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Impact of Surface Facilities on Addressing Liquid Loading Breakout Session

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  1. Impact of Surface Facilities on Addressing Liquid Loading Breakout Session Robert Lestz - Chevron 28 Feb 2006

  2. Effects of Downhole Skin Effects of Surface Restrictions Effects of Surface and Downhole Pressure Losses Assumed Critical Rate

  3. Flow Behaviors in Flowlines • Liquids should be expected to accumulate in the flowline • Liquids will drop out as the gas cools due to condensation (downstream of compression, winter time, etc…)

  4. Condensation - an Everyday Event

  5. Flow Behaviors in the Tubing

  6. Rotary Screw Compression • Pro’s • Can Pull a Vacuum • Works Well as a Charge Pump for a Recip • Can Handle High Compression Ratios • Minimal Moving Parts (as Compared to a Recip) • Con’s • Discharge Pressure is Limited (~250 psi) • Requires a Gas/Oil Separator • Requires an Oil Cooling System

  7. A Single Well Plunger Lift Utilizing a Rotary Screw Compressor w/a Chevy Engine Driver

  8. A Single Well Plunger Lift Utilizing a Rotary Screw Compressor w/a Chevy Engine Driver

  9. Summary from Break Out Session • Poor communications and competing objectives (gas volume vs run time) between field operators and compressor operators are common in many companies • This lack of team work exacerbates liquid loading • Liquid accumulation in flowlines should be expected and designed for • Flowlines need to be sized to handle the conditions at depletion (lower pressure, higher velocities, liquid slugging) • Single well compression is manpower intensive. Most company’s avoid it but those who master it are realizing $$$ benefits • Creative applications (rotary screw, slipstreaming gas, interstage compression) should be considered if making more gas is a driver

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