METHOD FOR DETERMINING A FLUID CONTACT LEVEL IN A FORMATION

摘要

A method for determining the depth (D L) of a fluid contact level between a first fluid (F1), such as water, and a second fluid (F2), such as crude oil or natural gas, within the pores of an oil and/or gas bearing formation surrounding a borehole comprises measuring the phase pressure P F1 and P F2 of said pore fluids using a pressure probe assembly which is lowered to a depth (D p) above the depth of said contact level (D L) and determining the depth of said interface on the basis of the equation (I).