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. 23, 1980
Filed:
Jun. 22, 1979
Alvin J Sustek, Jr, Houston, TX (US);
Terry L Frazier, Houston, TX (US);
Texaco Inc., White Plains, NY (US);
Abstract
Fluid injectivity within an interval in a well bore is determined by injecting into the well two fluid streams, one of which flows down the tubing and one of which flows down the annulus, each of said fluid streams containing a different radioactive tracer. The fluid stream injected into the tubing contains a radioactive tracer that is soluble almost exclusively in the liquid phase of the fluid, while the annulus fluid stream contains a radioactive tracer soluble almost exclusively in the gas phase of the fluid. The sum of the two fluid flow rates is held constant while each flow rate is varied against the other. At each different pair of flow rates, stable interfaces will be formed between the gas phase in the tubing and the gas phase from the annulus as well as the liquid phase in the tubing and the liquid phase from the annulus. The position of these stable interfaces at each different set of fluid flow rates is measured by a conventional gamma ray well logging tool, and from the series of such measurements an injectivity log for both fluid phases over the measured interval can be determined.