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:
Jul. 07, 1987
Filed:
Aug. 19, 1985
Joseph Ayoub, Lafayette, LA (US);
Dominique Bourdet, Vaux-le-Penil, FR;
Schlumberger Technology Corporation, Houston, TX (US);
Abstract
The invention relates to a well test method for determining the physical characteristics of a system made up of a well and a subsurface formation containing a fluid such as a hydrocarbon. A change in the flow rate of said fluid is produced for a short period (duration t.sub.P of the order of a few minutes) so as to obtain a flow pulse resembling a Dirac pulse; the variations .DELTA.P of the down-hole fluid pressure is measured during said short period and then during the subsequent period of return to the initial state of the well-formation system, and the experimental pressure curve thus obtained is compared with the curves of a double network of type curves representing, as a function of a common parameter, the pressure P.sub.D and its derivative P'.sub.D with respect to time, by matching the branch of the experimental curve corresponding to the short period with a curve P.sub.D and the branch of this curve corresponding to the subsequent period with the curve P'.sub.D of the same parameter.