Expro Excellence
Well Intervention and Integrity
Case study: Expro performs bespoke annulus intervention
Customer challenges
  • Expro was approached by Centrica to review a leakage in the casing cement with formation fluid that had entered the annulus and created a salt plug
  • During a routine bleed-off the annulus pressure dropped to 0 Psi, which illustrated that the annulus was blocked. This would have resulted in the well being shut in because of these integrity issues
  • The customer was unable to bleed of the pressure built-up in the annulus and the consequences could have led to the casing collapsing
Expro Excellence
  • Expro offered a bespoke solution to run Octopoda™ - our annulus intervention system in the salt plug, displacing the annulus from the Zechstein formation fluid, replacing it with fresh water which would dissolve the salt plug  
  • Expro’s annulus intervention system offers minimally intrusive equipment allowing the remediation of annular integrity issues without the use of a heavy workover rig. The alternative for the customer would have been using a workover rig and without this solution there was a high possibility that the casing would have collapsed
  • Our Octopoda™ - annulus intervention system allowed us to enter through the casing hanger and run down the annulus
  • Our system displaced the annulus fluid while removing and measuring salt content. This operation was completed in four runs
  • Communicating pressure to the reservoir was achieved after circulating fresh water on depth
  • After circulating fresh water in the reservoir the annulus pressure was successfully restored
Value to client
  • Expro is the only provider of this annular intervention service
  • Without the requirement for a workover rig this significantly reduced the customers cost
  • A bespoke solution was made for Centrica for this job and full scale testing was performed at our Expro base before mobilising offshore
  • Increased oil recovery through the revitalisation of a well which would have been previously shut-in
Contact

Case study: Expro performs bespoke annulus intervention

In Brief
Expro offered a bespoke solution to run Octopoda™ - our annulus intervention system in the salt plug
Product Line
Well Intervention and Integrity
Region
Europe and Sub Saharan Africa
Customer challenges
  • Expro was approached by Centrica to review a leakage in the casing cement with formation fluid that had entered the annulus and created a salt plug
  • During a routine bleed-off the annulus pressure dropped to 0 Psi, which illustrated that the annulus was blocked. This would have resulted in the well being shut in because of these integrity issues
  • The customer was unable to bleed of the pressure built-up in the annulus and the consequences could have led to the casing collapsing
Expro Excellence
  • Expro offered a bespoke solution to run Octopoda™ - our annulus intervention system in the salt plug, displacing the annulus from the Zechstein formation fluid, replacing it with fresh water which would dissolve the salt plug  
  • Expro’s annulus intervention system offers minimally intrusive equipment allowing the remediation of annular integrity issues without the use of a heavy workover rig. The alternative for the customer would have been using a workover rig and without this solution there was a high possibility that the casing would have collapsed
  • Our Octopoda™ - annulus intervention system allowed us to enter through the casing hanger and run down the annulus
  • Our system displaced the annulus fluid while removing and measuring salt content. This operation was completed in four runs
  • Communicating pressure to the reservoir was achieved after circulating fresh water on depth
  • After circulating fresh water in the reservoir the annulus pressure was successfully restored
Value to client
  • Expro is the only provider of this annular intervention service
  • Without the requirement for a workover rig this significantly reduced the customers cost
  • A bespoke solution was made for Centrica for this job and full scale testing was performed at our Expro base before mobilising offshore
  • Increased oil recovery through the revitalisation of a well which would have been previously shut-in
Contact

For further information, please contact:

wellintervention@exprogroup.com