Advanced Annulus Barrier Qualification

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Combine DrillScan Casing Centralisation Placement service with Curistec cementing expertise

Qualify the cement sheath as competent safety barrier by ensuring uniform distribution and appropriate cement design

Avoid abnormal annulus pressure developments during the life-cycle of the well

Ensure appropriate standoff along the shoe track and casing string by simulating centralisation

Advanced annulus barrier qualification service description

Using a combination of two DrillScan modules that state of the art, Local Dogleg and Casing Deformation and Standoff, as well as Curistecs cementation know-how the Advanced Annulus Barrier Qualification service is able to determine the standoff along an entire well architecture as well as the appropriate cementation properties.

Drillscan’s Local Dogleg assess’ local doglegs between spaced survey stations.

It computes inclination and azimuth at intermediate depths using a unique step-by-step process.

The software takes into account field data (WOB), geological information (UCS, formation dip and strike), steering sheet (Toolface orientation and activation level logs) and mud sheets, the software enables reproducing the Slide/Rotate Pattern of a Motor BHA, as well as tortuosity resulting from any other type of BHA.

DrillScan’s Casing Deformation and Standoff module is able to model the deflection of a given casing architecture within the wellbore, computing the casing standoff from TD to surface even in a Multi-String configuration. The standoff is computed using a unique stiff-string model using an algorithm to compute the deflection of the centralized casing in an iterative process. Recent developments model the effect of restoring force of bow-spring centralizers attached to the casing. This analysis may highlight undesired Tight spots and locations of un-centered casing that may need additional centralization and which could cause problems during the cementation operation.

CurisIntegrity software application is able to model cement hydration under downhole conditions based on an innovative constitutive law that takes into account the exothermic nature of cement hydration and the changes of cement geometrical, physical and mechanical properties versus time. It is able to model the impact of well events such as changes in mud density, wellhead pressure and temperature. Heat transfer by conduction, advection, natural convection, and radiation are taken into account.

CurisIntegrity simulations encompass the full length of a cement sheath at once, taking into account tubular standoff versus depth and the uncertainty in formation mechanical properties

Benefits of advanced annulus barrier qualification

Advanced annulus barrier qualification service usage by drilling project phase
Pre-WellReal TimePost-Well
  • Well integrity

    Ensure proper well integrity for the well life-cycle combining DrillScan’s and Curistec’s solutions.

  • Improve safety

    Improve safety by enhancing cement barrier effectiveness and meet company and legal requirements.

  • Production loss

    Prevent loss of production and/or reservoir damage by gas migration through insufficient cement.

  • Hidden lost time

    Reduce hidden lost time and potential failure by suboptimal centralisation program or cement design.

  • Cement integrity investigation

    Reduce costly cement integrity investigation and avoid remedial operation.