Evaluation of clay control additives for matrix acidizing operations

Conference · Sat Sep 01 04:00:00 EDT 1984 · Soc. Pet. Eng. AIME, Pap.; (United States)

OSTI ID:6252891

Hsi, C D

Clay control additives are often used in matrix acidizing operations to minimize formation permeability damages and to prolong stimulation results. However, some of these additives were developed originally for application in fracturing fluids, and their performance and stability in strong acidic solutions have not been thoroughly tested. In the study, the clay stabilization performances of one inorganic and three organic polymer type clay control additives were evaluated using core flow tests. The relative effectiveness of an individual additive was judged by its ability to prevent permeability damages due to either chemical incompatibility (fresh-water sensitivity) or mechanical dislodging (particle migration) at higher fluid velocities. The influence of temperature, acid concentration and carrier fluid composition on their performance was also studied. Results indicate that some additives are not effective in preventing fresh-water sensitivity when applied directly in acids. Test results were also compared with cores treated with HC1-HF acid under similar conditions. In general, HC1-HF acid treatments are more effective than clay control additive type treatments in preventing permeability damages due to mechanical dislodging (particle migration) at high fluid velocities. The advantages and disadvantages of each method in preventing formation damages during matrix stimulation are also discussed.

• Research Organization: Dowell Schlumberger
• OSTI ID: 6252891
• Report Number(s): CONF-8409104-
• Conference Information: Journal Name: Soc. Pet. Eng. AIME, Pap.; (United States) Journal Volume: SPE13086
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030900 -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ACIDIZATION
ADDITIVES
FLUIDS
FORMATION DAMAGE
FRACTURING FLUIDS
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
NATURAL GAS WELLS
OIL WELLS
PERFORMANCE TESTING
PERMEABILITY
POLYMERS
ROCK-FLUID INTERACTIONS
TECHNOLOGY TRANSFER
TESTING
WELLS