Acidizing composition

Patent · Tue Dec 18 04:00:00 EST 1973

OSTI ID:6985911

Crowe, C W

In acid treatments of wells, the acid can be pumped only a certain distance into the formation before the acid becomes spent. The time required for the acid to become spent is generally referred to as the reaction time. To more efficiently treat certain formations, it is desirous to increase the reaction time of the acid. This is true for instance when the acid solution is to be employed to also fracture the formation. An acid-in-oil emulsion having a greatly enhanced retardation rate is prepared by employing in the emulsion a mixture of an effective amount of an oil wetting surfactant, e.g., a saturated hydrocarbon sulfonate, and an emulsifier, e.g., an alkylaryl sulfonic acid or water soluble salt thereof. (3 claims)

• Assignee: Dow Chemical Co.
• Patent Number(s): US 3779916
• OSTI ID: 6985911
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
ACIDIZATION
ADDITIVES
CHEMICAL COMPOSITION
COLLOIDS
COMMINUTION
DISPERSIONS
EMULSIONS
ENHANCED RECOVERY
FRACTURING
GEOLOGIC FORMATIONS
OIL WELLS
RECOVERY
SURFACTANTS
WELLS