New, deep-penetrating acidizing technique uses alternate stages of pad fluid and acid

Conference · Thu Jan 01 04:00:00 EST 1976 · Proc. Annu. Southwest. Pet. Short Course; (United States)

OSTI ID:6891573

Coulter, A W

Although not recognized as a definite acidizing technique, fracture acidizing has probably occurred in a majority of acidizing treatments throughout the history of the process. The industry has long recognized that actual results obtained by acidizing carbonate formations were not equal to increases predicted by the design programs. During the past 10 yr, considerable research has been directed toward shortening the gap between actual and predicted results. Some of the approaches taken have been acid retardation, increased acid concentration, increased fracture width to decrease the area-volume ratio, improved matrix leakoff control, and improved computer calculations. All these approaches had one basic purpose--to increase live acid penetration of the reservoir rock. A new acid fracturing technique using alternating stages of pad fluid and acid has been proven highly successful in achieving results that approximate predicted results of acid fracturing treatments. This success is believed due to the fact that the technique reduces leakoff into the hair-line fractures as well as the matrix. A description of fluid-flow behavior during acid fracturing shows how the new technique provides better penetration and better results from treatments.

• Research Organization: Dowell Div Dow Chemical Co
• OSTI ID: 6891573
• Report Number(s): CONF-760410-
• Conference Information: Journal Name: Proc. Annu. Southwest. Pet. Short Course; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
COMMINUTION
COMPARATIVE EVALUATIONS
EFFICIENCY
FRACTURING
OIL WELLS
PERMEABILITY
RESERVOIR ROCK
WELLS