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Paper Preview Paper Number 63180-MS

Summary: Paper Preview
Paper Number 63180-MS
Title Improving Sandstone Matrix Acidizing for Oil Wells by Gas Preconditioning
Authors M.A. Aggour, King Fahd University of Petroleum & Minerals; M.A. Al-Muhareb,
Saudi Aramco; S.A Abu-Khamsin, A.A. Al-Majed, King Fahd University of
Petroleum & Minerals
Source SPE Annual Technical Conference and Exhibition, 1-4 October, Dallas, Texas
Copyright Copyright 2000, Society of Petroleum Engineers Inc.
Preview 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
acidized with gas. Gas injection prior to acidizing is sought to minimize the
formation of emulsions or sludges between the spent acid products and the oil that
otherwise would be contacted.


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


Collections: Fossil Fuels