You shall look for the reason such pressure test value is required (basically identify the risk covered by this control measure, pressure test to be 4,000 psi).
Here are some guidelines for pressure test value:
- the pressure applied at the face of the perforations is predetermined at the job-design stage. It may be the reservoir pressure, but should not exceed the formation fracturing pressure.
- before drilling the cement plug, 80% of the minimum yield of the weakest point shall be considered as pressure test value.
- once casing shoe has been drilled, the pressure at the casing shoe shall be larger than the expected to be applied at this point during drilling the next phase (normally 0.65 lb/ft).