Patent ID: 6474152
Filing Date: 2002-11-05
Classification: G01N

Abstract:
A borehole apparatus for measuring downhole the compressibility of hydrocarbon fluid in a formation, comprising:a) a testing region; b) a conduit for directing the formation fluid into said testing region; c) means for measuring pressure on the fluid in said testing region; d) means for changing pressure on the fluid in said testing region; e) a light source which emits at least near infrared rays into said testing region; f) a spectral detector optically coupled to said testing region; and g) a processing means coupled to said spectral detector and to said means for measuring pressure, said processing means for determining said compressibility of said hydrocarbon fluid as a function of a change in pressure determined from at least two measurements made by said means for measuring pressure and as a function of measurements made by said spectral detector.