Method for formation stimulation in horizontal wellbores using hydraulic fracturing
This patent describes a method for stimulating a formation penetrated by a horizontal wellbore. It comprises: perforating a horizontal wellbore along its top side at desired intervals so as to enable fluid communication with the formation; fracturing hydraulically the formation through perforations in the wellbore with a fracturing fluid containing a substantially lightweight proppant which has a density substantially equal to the fluid thereby creating a fracture within a first interval of the formation and maximizing multilayer proppant placement within the fracture; releasing hydraulic pressure on the formation thereby causing the fracture to be propped with the proppant; placing ball sealers in the fracturing fluid in an amount sufficient to close perforations in the wellbore adjacent the first interval; applying pressure in an amount sufficient to fracture the formation in an area adjacent to the first interval. This causes the ball sealers to seal off perforations in the first interval and direct fluid into a second perforated interval of the wellbore thereby fracturing the formation adjacent to the second interval; and releasing pressure applied to the fluid thereby maximizing multilayer proppant placement and causing the ball sealers to float upwardly with the fluid through the wellbore where they are recovered.
- Assignee:
- Mobil Oil Corp., New York, NY (USA)
- Patent Number(s):
- US 4938286; A
- Application Number:
- PPN: US s 7-379755
- OSTI ID:
- 6830969
- Resource Relation:
- Patent File Date: 14 Jul 1989
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
NATURAL GAS WELLS
HYDRAULIC FRACTURING
OIL WELLS
DIRECTIONAL DRILLING
ENHANCED RECOVERY
FLUIDS
FRACTURING FLUIDS
WELL STIMULATION
COMMINUTION
DRILLING
FRACTURING
RECOVERY
STIMULATION
WELLS
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