Effective matrix acidizing in carbonates using microemulsions

Journal Article · Wed May 01 04:00:00 EDT 1985 · Chem. Eng. Prog.; (United States)

OSTI ID:6405788

Hoefner, M L; Fogler, H S

The process of matrix acidizing of oil reservoirs is described. It is designed to improve well productivity by increasing rock permeability in the region surrounding the wellbore. As resistance to flow is reduced, oil can move more easily to the wellbore and production increases. A reacting mixture, usually containing HCI for limestone and an HCI/HF mixture for sandstone, is pumped into the well at pressures low enough to avoid fracturing the formation rock or to open existing fractures. The goal is to achieve a somewhat uniform radial penetration of acid into the formation porespace. Partial dissolution of the matrix can then take place, and rock permeability is increased.

• Research Organization: The Univ. of Michigan, Ann Arbor, Mich.
• OSTI ID: 6405788
• Journal Information: Chem. Eng. Prog.; (United States), Journal Name: Chem. Eng. Prog.; (United States) Vol. 81:5; ISSN CEPRA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
CARBONATE ROCKS
COLLOIDS
DISPERSIONS
DISPLACEMENT FLUIDS
EMULSIONS
ENGINEERING
ENHANCED RECOVERY
FLOW RATE
FLUID INJECTION
FLUIDS
GEOLOGIC FRACTURES
GEOLOGIC STRUCTURES
HYDRAULIC CONDUCTIVITY
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
PERMEABILITY
RECOVERY
RESERVOIR ENGINEERING
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STIMULATION
SWEEP EFFICIENCY
WELL STIMULATION
WELLS