A method is disclosed for determining true formation pressure in formations surrounding a fluid-containing borehole having a mudcake on the surface thereof, including the following steps: with the pressure in the borehole at a first measured borehole pressure, measuring, as a first probe ...http://www.google.fr/patents/US5789669?utm_source=gb-gplus-shareBrevet US5789669 - Method and apparatus for determining formation pressure
Method and apparatus for determining formation pressure
