The deformation of casing in a compacting reservoir has been simulated in model experiments to assist with the design of compaction-tolerant completions installed in deep-water, unconsolidated sandstone reservoirs.

Compaction causes severe casing buckling if the lateral casing support is insufficient. Vertical casing with adequate support has been compacted 10% without developing excessive dogleg. Compaction of deviated casing results in casing ellipticity and bending. The model test results are confirmed by field observations (borehole televiewer data). The experimental results indicate that casing damage in a compacting reservoir can be reduced by providing adequate lateral support, by changing the wellbore deviation and by using thick-walled casing.

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