Casing Centralisation Placement

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Achieve the cementation and annulus safety barrier objectives

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

Determine casing string deformation against doglegs and solve issues using proper centralisation

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

Casing centralisation placement service description

Using a combination of two DrillScan Drilling Software Solutions, Local Dogleg and Casing Deformation & Standoff, the Casing Centralisation Placement service is able to determine the standoff and cement sheet thickness along critical intervals of the well architecture. This service can be delivered at well engineering stage and in real-time at section TD for tunning the casing centralisation programme. Post-cementing job analysis is likely available.

DrillScan’s local doglegs process 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), caliper logs and mud data. 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 solution is able to model the deflection of a given casing string 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 centralised 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 to achieve the required cement sheet barrier and annulus seal-off.

Benefits of casing centralisation placement

Casing centralisation placement service usage by drilling project phase
Pre-WellReal TimePost-Well
  • Well integrity

    Ensure proper well integrity for the entire well life-cycle by uniform cement distribution.

  • Cement barrier

    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.

  • Cased hole doglegs

    Anticipate remaining cased hole doglegs to launch mitigation measures early on.

  • Centralisation program

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