Method and composition for treating high-temperature subterranean formations
A method and composition for temporarily reducing the permeability of high-temperature, permeable oil-bearing formations are described. The method and compositions have particular application in hydraulic fracturing, in well treating, and in completing oil and gas wells that penetrate relatively high-temperature subterranean formations. The water-insoluble particular composition has controlled slow oil-solubility at elevated temperatures. It is comprised of solid particles of a homogeneous mixture of (1) about 4 to 30% by wt of an ethylene-vinyl acetate copolymer containing about 15 to 30% by wt vinyl acetate, (2) a paraffin wax having a melting point between about 130$ and 175$F, and (3) about 10 to 25% by wt of a long chain aliphatic hydrocarbon or oxidized hydrocarbon wax melting between about 195$ and 250$F and exhibiting an Izod strength of less than 0.9 ft-lb. (36 claims)
- Assignee:
- TUL; EDB-82-009785
- Patent Number(s):
- US 3684012
- OSTI ID:
- 5925182
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
CHEMICAL COMPOSITION
COMMINUTION
FRACTURING
HYDRAULIC FRACTURING
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PERMEABILITY
PLUGGING
POLYMERS
RESERVOIR ROCK
RESERVOIR TEMPERATURE
STIMULATION
WAXES
WELL STIMULATION
WELL TEMPERATURE
WELLS