[12] Patent
[11] Patent No.:GC0007546  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125830
Date of the Decision to Grant the Patent:09/Apr/2018

[21] Application No.:GC 2012-23095

[22] Filing Date:18/12/2012

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventor: Jim-Viktor PAULSEN

[73] Owner: IMPACT TECHNOLOGY SYSTEMS AS, Filipstad Brygge 1, OSLO 0252, Norway

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C




Int. Cl.: E21B28/00; E21B43/00; E21B43/16; E21B43/25 (2006.01)

[56] Cited Documents:

-WO 2011157740 A1 (NBT AS [NO] ; PAULSEN JIM-VIKTOR [NO])
22 December 2011
-PRIDE s R ET AL: Seismic stimulation for enhanced oil recovery ,
vol. 73, no. 5, 1 September 2008
-US 2011108271 A1 (HINKEL JERALD J [US] ET AL) 12 May 2011
Examiner: Rami Al-Ghamdi

[57] Abstract: A method is described for recovery of a hydrocarbon fluid from a porous medium by injection of a fluid into the porous medium. The method comprises determining a Rayleigh time on the basis of the density of the fluid and the hydrocarbon fluid, the median pore diameter of the porous medium, and surface tension between the fluid and the hydrocarbon fluid. Further, pressure stimulation is provided in the fluid and generated by a collision process with a collision contact rise time which is of the range of 1-100 times the Rayleigh time. Alternatively or additionally, the providing a pressure stimulation in the fluid include generating an impact pressure with a pressure amplitude I and a pressure rise time , where the pressure amplitude is larger than the relation , where is the surface tension between the fluid and the hydrocarbon fluid, and is the speed of sound in the porous media.In aspects of the invention, the method comprises arranging a chamber in fluid communication with the porous medium via at least one conduit, and having the chamber comprising first and second wall parts movable relative to each other. The pressure stimulation comprises providing an impact pressure in the fluid to propagate to the porous medium via the conduit, and where the impact pressure is generated by the collision process between an object arranged outside of the fluid and the first wall parts for the first wall part to impact on the fluid in the chamber.(figure 17B)
No. of claims: 17     No. of figures: 28


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