Limited entry, multiple fracturing from deviated wellbores

Patent · Tue Sep 19 00:00:00 EDT 1989

OSTI ID:5404977

Strubhar, M K

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
• Resource Relation: Patent File Date: 1 Jun 1988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
HYDRAULIC FRACTURING
OIL WELLS
ENHANCED RECOVERY
FRACTURING FLUIDS
PERFORATION
PETROLEUM
WELL STIMULATION
COMMINUTION
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FRACTURING
FUELS
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing