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:
Jun. 18, 2002
Filed:
Aug. 30, 2000
Gary F. Teletzke, Sugar Land, TX (US);
ExxonMobil Upstream Research Company, Houston, TX (US);
Abstract
A method is disclosed of estimating a property of a hydrocarbon-bearing formation penetrated by at least one injection well through which fluid is injected into the formation and penetrated by at least one production well through which fluid is produced from the formation. The injection rates of fluid through the injection wells are periodically varied and measured at substantially regular time intervals and measurements are also made of the production rate of fluid produced through the production well. A series of production well response delays, &tgr;, are selected. A set of correlation coefficients between the injection rate for each injection well and the production rate as a function of &tgr; are determined. From each set of correlation coefficients, a time lag, &tgr; , corresponding to the maximum correlation coefficient is determined. The &tgr; is then used to characterize a formation property, such as channel volume, permeability, or transmissibility.