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:
Oct. 20, 2015
Filed:
Dec. 15, 2011
John R. Adams, Katy, TX (US);
Siyavash Motealleh, Houston, TX (US);
Herbert M. Sebastian, Cypress, TX (US);
Yuanlin Jiang, Katy, TX (US);
Bryan Dotson, Houston, TX (US);
John R. Adams, Katy, TX (US);
Siyavash Motealleh, Houston, TX (US);
Herbert M. Sebastian, Cypress, TX (US);
Yuanlin Jiang, Katy, TX (US);
Bryan Dotson, Houston, TX (US);
BP Corporation North America Inc., Houston, TN (US);
Abstract
A new approach is disclosed for measuring the pressure of tight gas reservoirs, using information obtain from continuous injection prior to hydraulic fracture stimulation. The technique can be obtained utilizing either bottom-hole or surface pressure gauges and properly instrumented surface injection pumps. The analysis is completed by plotting injection and rate data in a specialized form from terms arranged in Darcy's radial flow equation to obtain a curve or trend. The key component to proper application of this technique is to obtain both baseline and one or more calibration data sets. These calibration data sets are obtained by either increasing or decreasing the injection pressure and/or rate from the baseline data. Initial reservoir pressure is assumed, but the calibration data indicates if the guess was too high or low. Accurate estimates of reservoir pressure may be obtained in a few iterations.