The Impact of Matrix Acidizing on the Petrophysical Properties of the Mishrif Formation: Experimental Investigation

  • Usama Sahib Alameedy College of Engineering-University of Baghdad
  • Ayad A. Al-haleem Petroleum Engineering Department, College of Engineering, University of Baghdad, Baghdad, Iraq
Keywords: Mishrif reservoir; Matrix acidizing; wormholes; stimulation operations; acid core-flood; CT-scan


           Matrix acidizing is a well stimulation process in which acid is introduced into the reservoir near the wellbore area via the wellbore or coil tubing. In the oil industry, formation damage is a prevalent problem. Bypassing wellbore damage by producing wormholes in carbonate reservoirs is the main purpose of acidizing the matrix of the formation. When doing lab tests, scientists are looking for a wormhole-inducing injection rate that can be used in the field. While working on the Ahdeb oil field's Mishrif reservoir, several reports have documented the difficulties encountered during stimulation operations, including high injection pressures that make it difficult to inject acid into the reservoir formation; and only a few acid jobs have been successful in Ahdeb oil wells, while the majority of the others have been failures; For this formation, there is a high incidence of oil well stimulation failure. This requires more study. Thus, in this work, we experimented to examine the effect of acid treatment on the petrophysical parameters of the Mishrif reservoir. Seven core samples from a central Iraqi oil field were used in the acid core-flood tests.