Acid injection is the recommended treatment for productivity enhancement in carbonate reservoirs. Acid stimulation is a difficult challenge due to the instability of the dissolution figure, named wormhole, which depends strongly on the nature of the carbonate (heterogeneity). The objective of our company is to improve current carbonate matrix acidizing treatment to consider various stimulation strategy.
In carbonate matrix acidizing, the propagation of wormholes as deeply as possible into the formation with the maximum coverage along the wellbore is a major concern. Diverting agents based on polymer crosslinking (or Viscoelastic surfactant) are currently used for matrix acidizing. The crosslinking occurs as the acid is consumed. Wormholes formed in the high permeability zone are temporarily blocked and the subsequent acid slug enters the low permeability zone. The treatment is efficient, provided that the diversion procedure is adequately designed. Our in-house software considered all diverting agents to predict wormhole propagation rigorously.
Features
- Complete matrix acid design, simulation, and scheduling for multi-layer reservoir
- Transient pressure and skin calculation
- Carbonate acidizing and wormhole modeling
- Diverting process modeling
- Formation damage and skin characterization
- Preloaded libraries of stimulation fluids, lithologies, and formations
- Simple candidate selection capabilities