First Regional Selective Packerless Acid Fracture Stimulation With Coiled Tubing: A Documented Case History From Saudi Arabia

摘要

A review of stimulation methods previously used in the Hanifa formation (primarily diesel emulsified acid/visco- elastic diverting systems) performed during the first two quarters of 2005, revealed that while initial post-stimulation vertical or deviated well performance was typically improved, it was also short-lived. All the wells exhibited a gradual loss in productivity after the stimulation treatments. Furthermore, in horizontal wells, the problem was aggravated as there is not enough control of acid placement over long open hole carbonate intervals where permeability or damage contrast exists; requiring a deeper matrix stimulation.