Limited entry, multiple fracturing from deviated wellbores
This patent describes a limited entry method for inducing simultaneously multiple vertical fractures in a deviated wellbore penetrating a subterranean formation. It comprises: determining a horizontal distance the deviated wellbore must travel to obtain the most effective and efficient recovery of resources from the formation which formation is not required to exhibit a predetermined minimum pressure increase; drilling the deviated wellbore through the formation at an angle of deviation sufficient to achieve the horizontal distance and at an angle of incidence to a preferred fracture orientation sufficient to obtain the most effective and efficient recovery of the resources; casing the deviated wellbore; ascertaining the number and size of holes to be made in the wellbore casing after deciding a fracture treatment fluid to be used, the fluid's pumping rate, and the perforation pressure drop necessary to divert the fluid through all holes at a rate sufficient to simultaneously create multiple vertical fractures in the formation; perforating the wellbore to create holes therein of the ascertained number and size sufficient to create the fractures when flowing a treating fluid therethrough at an ascertained pumping rate; and placing a pressure on the treating fluid in an amount and at a pumping rate sufficient to create simultaneously multiple vertical fractures in the formation through the holes.
- Assignee:
- Mobil Oil Corp., New York, NY
- Patent Number(s):
- US 4867241
- Application Number:
- PPN: US 7201650A
- OSTI ID:
- 5404977
- 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
COMMINUTION
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FRACTURING
FRACTURING FLUIDS
FUELS
HYDRAULIC FRACTURING
NATURAL GAS WELLS
OIL WELLS
PERFORATION
PETROLEUM
RECOVERY
STIMULATION
WELL STIMULATION
WELLS