Title: Method of measuring horizontal flow speed of fluids in earth formations penetrated by a wellborehole

Abstract: The horizontal flow rate of fluid in permeable earth formations is measured by the in situ creation of a radioactive tracer isotope having a predetermined decay life time and decay mode. Measurements at different time intervals following the creation of the tracer isotope of the decay radiation may then be interpreted in terms of the horizontal movement of fluids past a well borehole. Tracer isotopes to be created are selectively provided for measuring both relatively fast and relatively slow expected values of horizontal flow speed.

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Inventors: Arnold, Dan M. (Houston, TX, US)
Paap, Hans J. (Houston, TX, US)
Scott, Hubert D. (Houston, TX, US)

Application Number: 698394
Filing Date: 1976-06-21
Publication_date: 1977-09-27
Assignee: Texaco Inc. (New York, NY)
Primary Class(es): 376/162 250/269.8, 376/118, 376/167
Other Classes:
US Patent Ref:

3304424	Feb, 1967	Mill, Jr.	250/270.
3603795	Sep, 1971	Allauo	250/264.
3851171	Nov, 1974	Saniford et al.	250/259.

Other Refs:
Primary Examiner: Willis, Davis L.
Assistant Examiner:
Attorney: Ries; Carl G., Whaley; Thomas H., Beard; William J.