Method for forming channels of high fluid conductivity in hard acid-soluble formations
A fracturing and acidization method for increasing the productivity of relatively hard acid-soluble formations about perforated well, consists of the following steps: 1) producing a formation fracture containing a viscous fluid and propping agent; 2) injecting an acid solution having a viscosity value 50 times less than the contained viscous fluid into the fluid filled fracture, thereby forming etched channels in the fracture walls and displacing the propping agent from such channels; and 3) lowering the fluid pressure in the fracture to allow the walls thereof to become displaced toward a closing position until held open by the propping agent. Channels so formed have a greater width than can be formed by conventional techniques and consequently substantially increase the productivity of such formations. 8 claims.
- Assignee:
- Shell International Research MIJ BV
- Patent Number(s):
- US 4245702
- OSTI ID:
- 6900502
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method for forming channels of high fluid conductivity in formation parts around a borehole
Method for forming channels of high fluid conductivity in formation parts around a borehole
Related Subjects
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
422000 -- Engineering-- Mining & Underground Engineering-- (1980-)
ACIDIZATION
COMMINUTION
FLUIDS
FRACTURING
FRACTURING FLUIDS
HYDRAULIC FRACTURING
PRODUCTIVITY
PROPPING AGENTS
STIMULATION
VISCOSITY
WELL STIMULATION
WELLS