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IMPROVING SANDSTONE MATRIX STIMULATION OF OIL
 

Summary: IMPROVING SANDSTONE
MATRIX STIMULATION OF OIL
WELLS BY GAS PRECONDITIONING
M. A. Aggour, M. Al-Muhareb,*
S. A. Abu-Khamsin, and A. A. Al-Majed
King Fahd University of Petroleum & Minerals,
Saudi Aramco, Dhahran, Saudi Arabia
ABSTRACT
Experience has shown that for sandstone formations, oil wells
respond to matrix acidizing in a different manner as compared
to gas wells. For oil wells, the improvement in permeability
resulting from the stimulation treatment peaks at a certain
acid volume and then drops as the volume of acid injected
increases. For gas wells, however, the resulting improvement
in permeability is roughly proportional to the volume of acid
injected, and is normally better than that obtained with oil
wells. It is, therefore, expected that stimulation of oil wells in
sandstone formations could be improved by displacing the oil
in the zone to be treated with gas. Gas injection prior to acid-
izing is sought to minimize the formation of emulsions or

  

Source: Abu-Khamsin, Sidqi - Department of Petroleum Engineering, King Fahd University of Petroleum and Minerals

 

Collections: Fossil Fuels