From Matrix Acidizing to Acid Facturing: A Laboratory Evaluation Of Acid/Rock Interactions

摘要

Acid fracturing and matrix acidizing are used as well-stimulation processes for carbonated reservoirs. In matrix acidizing, a deep penetration of wormholes around the well is required; in the acid- fracturing process, fluid leak-off must be limited and wormholes are prohibited. Laboratory tests are necessary to improve the design of these operations. Specific laboratory equipment was designed to reproduce Downhole flow conditions. Matrix acidizing is a constant flow rate Process, whereas acid in fracture is forced from the fracture wall to The formation, a process occurring at a constant pressure drop.