Tracing flow of petroleum in underground reservoirs

Details Tracing flow of petroleum in underground reservoirs Tracing flow of petroleum in underground reservoirs

E - Fixed Constructions

21

B

150/19, 166/4, 3

E21B 47/10 (2006.01) C07D 207/46 (2006.01) C07D 211/94 (2006.01) E21B 43/16 (2006.01) E21B 49/00 (2006.01) G01N 33/28 (2006.01) G01V 5/08 (2006.01)

Patent

CA 1056454

Abstract The flow path of petroleum in underground reser- voirs is monitored by injecting a stable free radical, or spin label, into the reservoir as a tracer which becomes detectable in a sample taken from a producing well. Detec- tion of the spin label is by electron spin resonance (ESR) spectroscopy. Spin label tracers are, on the average, detactable at dilutions I million times lower than is possible with standard chemical tracing methods.

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