[12] Patent
[11] Patent No.:GC0004512  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2016                32/2016  
Number of the Decision to Grant the Patent:2016/89378
Date of the Decision to Grant the Patent:11/Dec/2016

[21] Application No.:GCC/P/2005/5534

[22] Filing Date:17/12/2005

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
17/12/2004
60/637,134

[72] Inventors:1- PHILIP JAMES RAE،2- GINO DI LULLO ARIAS،3- ATIKAH JAMILAH BTE KUNJU AHMAD

[73] Owner: BJ SERVICES COMPANY, 5500 Northwest Central Drive, Houston 77092, USA

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: E21B43/00,E21B43/25,E21B43/26,E21B43/27 (2006.01)

[56] Cited Documents:

-US 6443230 B1 (BJ Services Company)03 September 2002
-US 5529125 A (BJ Services Company)25 June 1996
-US 3889753 A (Shell Oil Company)17 June 1975
 
Examiner: Eng. Ahmed Saleem AlHinai

[54] MATRIX TREATMENT OF DAMAGED SANDSTONE FORMATIONS USING BUFFERED HF-ACIDIZING SOLUTIONS
[57] Abstract: Sandstone formations of oil and gas and geothermal wells are effectively stimulated when a buffered HF-sandstone acidizing solution is employed Without the prior introduction of an acid containing preflush solution. By not using a preflush solution, buffered HF-sandstone acidizing solutions are highly effective in dissolving and removing siliceous material While minimizing the formation of calcium fluoride
No. of claims: 20     No. of figures: 4


 

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