Well Completion and Operation P2 V0.pdf


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OGIM

Well Completion and Operations

Stimulation
•Acidizing
• Carbonate formations: acid treatments
are designed to enhance permeability
by dissolving part of the rock matrix.
• Sandstone formations: the objective is
to squeeze acid into the existing pore
spaces of the rock matrix; this
improves productivity by removing
formation damage and dissolving
particles
MMA

OGIM

WCO -P2_2010 -V0

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Well Completion and Operations

Stimulation
•Acidizing
The acid job is depending on the
characteristics of the reservoir rock and
fluids and the configuration of the well and
the rock matrix. It includes:
• The type of acid to be used,
• the chemicals to be added to improve its
efficiency,
• the volumes to be pumped,
• and the pumping pressures to maintain
MMA

OGIM

WCO -P2_2010 -V0

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Well Completion and Operations

Stimulation
•Acidizing
• Hydrochloric acid (HCL) was used to
acidize limestone and dolomite in the
beginning of the 30’s.
• In the 40’s a mixture of Hydrochloric
acid (HCL) and hydrofluoric (HF) acid
called mud-acid was used.

MMA

WCO -P2_2010 -V0

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