Methods and systems for characterizing and/or monitoring wormhole regimes in matrix acidizing
Abstract:
Methods and systems for designing, monitoring, and/or performing acidizing treatments in subterranean formations are provided. In certain embodiments, the methods comprise: determining a wellbore pressure and a fluid flow distribution for an acidizing fluid introduced into a portion of a subterranean formation; determining a breakthrough pore volume at a plurality of depths in the formation to provide a PVBT curve; determining whether a slope of the PVBT curve at a point corresponding to a first flow rate of the acidizing fluid in the subterranean formation is indicative of a compact dissolution regime, e.g., is less than zero or a minimum point of a range of tolerance thereof; and, if so, identifying a second flow rate for introducing the acidizing fluid into the interval of the well bore that is greater than the first flow rate.
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