Real Results

Performance By The Numbers

Continuous Foamer Injection Via Capillary Line

Retrofitted in 60+ Wells Increased Average Gas Production by 20%, Eliminated Liquid Loading Issues

Objectives

  • Optimize liquid loading gas wells to a regime where they produced continuously rather than intermittently. Gas wells in the field were experiencing liquid loading and intermittent production as they depleted.
  • Reduce carbon footprint by minimizing gas flaring.
  • Perform installations without the requirement of a rig, reducing cost and carbon emissions.
  • Customize the solution by adapting to various downhole environments. Parameters that varied well to well included depths, water/condensate ratios, downhole temperatures, and water mineralization levels.

Our Approach

  • As part of a 10-well trial project, Weatherford engaged with the customer and performed a comprehensive production modeling study using the WellFlo® design and analysis software.
  • The wells were not completed with chemical injection lines, so continuous injection of a foamer was not possible with the existing completion. Weatherford proposed a unique capillary-conveyed solution for retrofitting a chemical injection line through the existing production tubing without the requirement for a workover. The retrofitted chemical injection line allowed for the continuous injection of a foamer as per the model proposed by Weatherford engineers to optimize production.
  • Weatherford’s experts established a solution-based approach that included a joint operational team with the customer to control the preparation, design, deployment processes, and share the knowledge and experience in both directions.
  • The collaboration between the customer and Weatherford:
    • Conducted a well-by-well review and design in the WellFlo software to identify and recommend the optimal well candidates
    • Produced fluid sample analysis for reaction with surfactants for each well, elaborating recommendations for concentrations, dosing rates, and injection points
    • Designed the installation of the capillary strings for each well using file-transfer-protocol (FTP) software
    • Performed rig-less injection valve and capillary string installation without stopping or killing wells
    • Designed, assembled, and installed chemical injection skids with solar panels, controllers, and pressure sensors for monitoring well behavior
    • Brought wellsite sensor data through mobile communication and CygNet® SCADA production-optimization platform to the ForeSite® production optimization platform, enabling the customer to monitor well performance and perform distant adjustments of chemical injection rates in real time
  • The production results and seamless execution of the 10-well trial project justified the extension of the solution to 60 wells.

Value to Customer

  • By optimizing well performances and reducing technological losses of the gas, the Weatherford solution realized an average increase of sales gas production over 20%.
  • The CygNet and ForeSite platforms provided remote, real-time capability for understanding well performances.
  • Operational trips and associated safety exposures of the customer’s personnel (on some wells requiring a daily visit for well purging cycle) were significantly reduced, allowing more time to focus on other work tasks.
  • The entire 70-well operation (10-well trial and 60-well extension) delivered safe, rigless, and in-time work deployments with zero nonproductive time (NPT).

Learn More

Production and Intervention
 
Print Version
Details

Location

Ukraine

Well Type

Gas

Hole Size and Angle

Vertical

Downhole Temperature

266°F (130°C)

Ambient Temperature (Winter)

-22°F (-30°C)

Depth

up to 16,404 ft (5,000 m)

Products/Services

An image from the ForeSite software platform: Monitoring casing pressure (purple) and tubing head pressure (orange) and optimizing production through surfactant dosing rate.

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