Case Study

Wireless Monitoring of interference effects from appraisal wells in Cyprus helps shape field development strategy

In Brief

A wireless system transformed an abandoned well into a data asset, providing long-term monitoring, tidal data, and strategic reservoir insight

Customer Challenges

  • A major operator in Cyprus aimed to reduce reservoir uncertainties by instrumenting an abandoned subsea well with a wireless monitoring system, transforming it into a high-value subsurface data monitoring asset. This initiative was designed to capture future interference testing data from subsequent appraisal wells, scheduled for drilling in 12 months’ time
  • The wireless monitoring system was intended to:
  • Provide Long-Term Monitoring: Enable continuous monitoring for more than 5 years, covering any drilling or well testing activities that may occur within the location
  • Record Tidal Data: Measure and record location-specific tidal data, ensuring the subsurface team has comprehensive reservoir and tidal data sets for incorporation into reservoir models
  • Support Strategic Decision-Making: Deliver accurate reservoir and tidal data to support and de-risk strategic, high-value decision-making associated with the field development plan

Expro Excellence

  • Expro installed a dual downhole system In order to measure the wellbore pressure gradient to monitor the swap-out of completion fluids with the reservoir fluids and establish the reservoir fluid gradient
  • The gauges for the well were pre-programmed with data transmission to give 5 years of monitoring
  • Shallow and deep-set cement plugs were set to provide the necessary barriers in the well
  • A CaTS subsea receiver was mounted on the side of the well debris cap to provide easy access to data via a PSV

Value to Client

  • Enhanced Monitoring: Utilized an abandoned subsea well as a data monitoring asset for optimal well integrity and performance. Providing 5+ years of accurate data for the client
  • Removed Reservoir Uncertainties: Enhanced ability to reduce reservoir uncertainties through advanced monitoring and data collection
  • Interference Testing Data: Collected valuable data during interference testing from an appraisal well
  • Long-Term Monitoring: Provide long-term monitoring data for better planning and analysis
  • Comprehensive Data Sets: Provided Access to comprehensive tidal and reservoir data sets for improved reservoir modeling
  • Support Strategic Decisions: Support and de-risked strategic and high-value decision-making associated with the field development plan
  • Efficient Installation: Achieve efficient installation of downhole and subsea equipment with single-run operations and ROV assistance
  • Real-Time Data: Enabled real- time data transmission, decoding and storing transmissions from gauges
  • Customer Readiness: Prepare data for immediate upload at the customer’s request, ensuring timely access to critical information

Contact

For further information, please contact wireless@expro.com.