Well integrity/control

The average geothermal gradient in the subject deepwater field in Nigeria is 4.37°C/100 m, nearly twice the gradient in most fields. As a result, the magnitude of the expected annular pressure buildup (APB) during steady-state production is large enough to threaten well integrity.
The complete paper discusses a geophone array, including four, three-component geophones deployed by wireline, that provides a solution for this problem by creating a 3D map of the acoustic environment.
Integrity (noun): the condition of having no part or element wanting; unbroken state; material wholeness, completeness, entirety. While reviewing the abstracts, I was struck by the huge range of challenges to maintaining “material wholeness” beyond the routine testing of tree and safety valves.

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