| 摘要 |
A pressure gauge system and a method for in-situ determination of a wellbore formation pressure through a layer of cement is disclosed. The system includes a housing arranged to be permanently installed in the cement on the outside of a wellbore casing, a second oil filled chamber between a first oil filled chamber and a pressure sensor to isolate the pressure sensor from the oil filled chamber, and a pressure permeable filter port in hydrostatic connectivity with the first oil filled chamber. The system further includes a porous string extending from the filter port, said string has a higher porosity and a higher hydrostatic connectivity than the cement for the formation fluid, and is arranged to transfer the formation fluid when it is embedded in the cement. |
