Measuring and testing – Borehole or drilling – Downhole test
Patent
1984-01-26
1990-04-10
Myracle, Jerry W.
Measuring and testing
Borehole or drilling
Downhole test
364422, E21B 4900
Patent
active
049149440
ABSTRACT:
Methods are disclosed which provide for determining in situ the characteristics of hydrocarbons including oil API gravity in a formation traversed by a borehole. The vanadium content in the formation is determined from a logging tool. The total vanadium content is then systematically separated into an oil vanadium content and a formation matrix or clay vanadium content. From the oil vanadium content and a determination of formation bulk density, porosity and oil saturation, the vanadium concentration of the oil is derived in parts per million, from which the API gravity is determined.
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Herron Michael M.
Schweitzer Jeffrey S.
Borst Stephen L.
Gordon David P.
Lee Peter Y.
Myracle Jerry W.
Schlumberger Technology Corp.
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