A series of experiments was conducted in which foam quality, foam reactivity, diverting-stage
volume, core permeability, and treatment design were varied. The goal was to determine …

Guidelines developed from field experience and laboratory tests increase the probability of
removing damage and stimulating production with foam-diverted acid treatments. Foam for …

Factors key to the success of foam diversion processes for matrix acidization were measured
in Berea cores. Foam mobility was low in high-permeability (847-md) Berea and higher in …

Foam has been used successfully in the field as a diverting agent for matrix acidizing when
layers of contrasting permeabilities are present. However, the mechanisms governing the …

This paper investigates the use of the foam diversion technique experimentally to
understand the mechanisms governing diversion in sandstones. The effect of the main …

Foam flow in porous media has been a subject of extensive investigation for the last 30
years because of its application in enhanced oil recovery (BOR) and stimulation operations …

We compare four approaches for efficient placement of acid in matrix-acidization treatments:
MAPDIR, particulate diverting agents, viscous acids, and foams. For each process, we …

It is a great challenge to divert acid into untreated zones in a thick, heterogeneous, and high
permeability sandstone formation. The heterogeneity can be created by hydraulic fracturing …

Often it is difficult to adequately treat the entire perforated interval in a damaged, gravel
packed well. Foam was evaluated in the lab as a diverting technique for hydrofluoric (HF) …

The proper placement of acid is a crucial factor in a matrixacidizing project. Unfortunately,
much of the acid flows through the less-damage zones, leaving the damage area untreated …