[12] Patent
[11] Patent No.:GC0007682  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126696
Date of the Decision to Grant the Patent:30/Apr/2018

[21] Application No.:GC 2010-15278

[22] Filing Date:15/2/2010

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
16/2/2009
61/152,886

[72] Inventor: JØRGENSEN, Ole

[73] Owner: Maersk Olie og Gas A/S, Esplanaden 50, DK- 1263, Copenhagen K, Denmark

[74] Agent: Kadasa Law Firm

  

 

  

[51]IPC:
Int. Cl.: G01V 1/50 (2006.01)

[56] Cited Documents:

-US 2006/034152 A1 (KORNEEV VALERI A [US]) 16 February 2006
-JORGENSEN OLE: “Ring-element analysis oflayered orthotropic bodies“, COMPUTER METHODS IN APPLIED MECHANICS ANDENGINEERING,vol. 102, February 1993
-WO 2008/024150 A2 (EXXONMOBIL UPSTREAM RESCO [US]; MEIER MARK A [US]) 28 February 2008
-GB 2 392 496 A (BRYGYNEVYCH VALENTYNOLEKSANDR [UA]) 03 March 2004
-US 5 859 811 A (MILLER DOUGLAS [US] ET AL) 12 January 1999
 
Examiner: Eng. Mohammed A. AlJaafar

[54] FINITE ELEMENT MODELLING OF BOREHOLE SEISMIC RESPONSES IN LAYERED ANISOTROPIC FORMATIONS AND ITS USE FOR ELASTIC INVERSION
[57] Abstract: A method of simulating a borehole acoustic response in an anisotropic formation of the crust of the earth, the method comprising: formulating a geometric model of the formation, the geometric model comprising a plurality of layers definable in a cylindrical coordinate system defined by an axial direction normal to each ofuthe layers, a radial direction relative to the axial direction, and a circumferential“direction relative tojhe axial direction; formulating a computational model of wave propagation in the formation, the computational model comprising one or more field variables and a wave equation describing a behaviour of the one or more field variables, wherein the one or more field variables are represented as respective Fourier series expansions of arc-periodic harmonics in the circumferential direction, and numerically solving the computational model
No. of claims: 19     No. of figures: 3


 

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