Expro Excellence
Well Intervention
Supporting well integrity operations on geothermal wells in The Netherlands
Objectives
  • During maintenance activities on a geothermal installation (two wells, drilled circa. 2013/2014) in The Netherlands, the wells were shut-in and downtime was optimised by undertaking well integrity checks, comparing data from surveys two years ago
  • The objectives were: to determine the well integrity status of the producer and injector wells; perform casing integrity measurements (both casing ID and wall thickness)
Expro Excellence
  • Expro delivered a comprehensive investigation programme through its fleet of wireline trucks: 60-arm multi-finger caliper (MFC) and magnetic imaging defectoscope (MID) tool, further complemented by reporting by specialists within the Data Analysis Centre
  • Interpretation of the data established that a section of the 9 5/8" casing in the producer well had collapsed - sections of the casing were now deformed into an oval shape, caused by formation movement (deformation recorded by the caliper tool with a change in gamma ray response that indicated a change in lithology)
  • Recommended slickine operatiosn were required prior to commencing operations
Value to client
  • A major repair programme (following complete failure) was avoided with proactive remediation by means of installation of a scab liner (extending the 6 5/8" casing into the 9 5/8") - this has now been established by the client as a new baseline for the scab liner
  • Reduced costs and environmental impact as natural gas would have been required to heat up the greenhouses for any period of time the wells were out of production
  • Government subsidies are suspended for every day that the wells are out of production

Contact

Supporting well integrity operations on geothermal wells in The Netherlands

In Brief
Expro support well integrity operations on geothermal wells in The Netherlands, avoiding shut down, as well as reducing remedial actions costs and environmental impact by alternative heat sources
Capability
Product Line
Well Intervention
Region
Europe CIS
Objectives
  • During maintenance activities on a geothermal installation (two wells, drilled circa. 2013/2014) in The Netherlands, the wells were shut-in and downtime was optimised by undertaking well integrity checks, comparing data from surveys two years ago
  • The objectives were: to determine the well integrity status of the producer and injector wells; perform casing integrity measurements (both casing ID and wall thickness)
Expro Excellence
  • Expro delivered a comprehensive investigation programme through its fleet of wireline trucks: 60-arm multi-finger caliper (MFC) and magnetic imaging defectoscope (MID) tool, further complemented by reporting by specialists within the Data Analysis Centre
  • Interpretation of the data established that a section of the 9 5/8" casing in the producer well had collapsed - sections of the casing were now deformed into an oval shape, caused by formation movement (deformation recorded by the caliper tool with a change in gamma ray response that indicated a change in lithology)
  • Recommended slickine operatiosn were required prior to commencing operations
Value to client
  • A major repair programme (following complete failure) was avoided with proactive remediation by means of installation of a scab liner (extending the 6 5/8" casing into the 9 5/8") - this has now been established by the client as a new baseline for the scab liner
  • Reduced costs and environmental impact as natural gas would have been required to heat up the greenhouses for any period of time the wells were out of production
  • Government subsidies are suspended for every day that the wells are out of production

Contact

For further information, please contact:

wellintervention@exprogroup.com
Related Case studies