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2014 (Vol. 7, Issue: 2)
Article Information:

Performance Comparison of New Combinations of Acids with Mud Acid in Sandstone Acidizing

Mian Umer Shafiq, Muhannad Talib Shuker and Aung Kyaw
Corresponding Author:  Mian Umer Shafiq 

Key words:  Acidizing, mud acid, permeability, sandstone, stimulation, undamaged wells,
Vol. 7 , (2): 324-328
Submitted Accepted Published
April 12, 2013 April 29, 2013 January 10, 2014
Abstract:

The aim of this research is to find the best suitable acid to acidize undamaged low permeable sandstone formation Stimulation of sandstone formations is a challenging task, which involves several chemicals and physical interactions of the acid with the formation. Mud acid has been successfully used to stimulate sandstone reservoirs for a number of years. Matrix acidizing may also be used to increase formation permeability in undamaged wells. The change may be up to 50 to 100% with the mud acid. For any acidizing process, the selection of acid (Formulation and Concentration) and the design (Pre-flush, Main Acid, After-flush) is very important. Different researchers are using different combinations of acids with different concentrations to get the best results for acidization. Mainly the common practice is combination of Hydrochloric Acid- Hydrofluoric with Concentration (3% HF-12% HCl). This study presents the results of a laboratory investigation of Orthophosphoric acid instead of hydrochloric acid in one combination and the second combination is Fluoboric and formic acid and the third one is formic and hydrofluoric acid. The results are compared with the mud acid and the results analyzed are porosity, permeability, strength, color change and FESEM Analysis. All of these new combinations shows that these have the potential to be used as acidizing acids on sandstone formations.
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  Cite this Reference:
Mian Umer Shafiq, Muhannad Talib Shuker and Aung Kyaw, 2014. Performance Comparison of New Combinations of Acids with Mud Acid in Sandstone Acidizing.  Research Journal of Applied Sciences, Engineering and Technology, 7(2): 324-328.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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