The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 03, 1991
Filed:
Aug. 24, 1990
Charles F Magnani, Placentia, CA (US);
Chevron Research and Technology Company, San Francisco, CA (US);
Abstract
A method of determining relative liquid and vapor phase steam profiles in a steam injection well utilizes an unstable radioactive isotope. A dual detector gamma ray logging tool is inserted into the well at a depth below the perforation zone. The unstable radioactive isotope is then injected into the steam flow, and it naturally hydrolyzes from a vapor phase into a liquid phase at a known rate, so that at a given time after injection, the relative proportions of the vapor phase and the liquid phase can be determined. The transmit times of the vapor and liquid phases to pass between the gamma ray detectors is measured and the above steps are then repeated at a second location. The amount of fluid entering a formation between the first and second locations can then be determined.