Reservoir stimulation method and apparatus
AssigneeStatoil Gulf Services LLC
InventorsAuristela Carolina Vasquez Quintero, Jason Bryant
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Abstract
A reservoir stimulation tool for stimulating a formation surrounding a wellbore having an inner wall includes: a tubular string including an outer wall defining therein an inner bore, the tubular string being configured to be inserted into the wellbore so as to form an annular space between the tubular string and the inner wall of the wellbore, a plurality of ports formed in the outer wall of the tubular string; a plurality of port valves for opening or closing the ports; and a plurality of packers coupled to the tubular string, wherein each packer is configured to be expanded in order to engage the inner wall of the wellbore, thereby isolating two or more longitudinal segments of the annular space from each other.
Claims21
A reservoir stimulation tool for stimulating a formation surrounding a cased wellbore having an inner wall, said tool comprising:
- a tubular string comprising an outer wall and an inner bore, said tubular string being configured to be inserted into the wellbore so as to form an annular space between the tubular string and said inner wall of the wellbore;
- a plurality of ports formed in said outer wall of the tubular string;
- a plurality of port valves for opening or closing said ports;
- a plurality of releasable packers coupled to the tubular string, wherein each packer is configured to be expanded in order to engage said inner wall of the wellbore, thereby isolating two or more longitudinal segments of said annular space from each other;
- and
- a sensor in each of said two or more longitudinal segments for measuring one or more fluid properties in the wellbore,
- wherein said reservoir stimulation tool is configured to store measured data from said sensors at said reservoir stimulation tool during stimulation and/or production so that said measured data is recoverable for analysis at the surface after said reservoir stimulation tool has been run out of the well.
A method of stimulating a formation surrounding a cased wellbore having an inner wall, said method comprising:
- inserting a reservoir stimulation tool into the wellbore, wherein said reservoir stimulation tool comprises a tubular string comprising an outer wall and an inner bore, a plurality of releasable packers coupled to the tubular string, a plurality of ports formed in said outer wall of the tubular string, and a plurality of port valves for opening or closing said ports;
- expanding said plurality of releasable packers to engage the inner wall of the wellbore, thereby isolating two or more longitudinal segments of an annular space between the tubular string and the inner wall of the wellbore from each other;
- opening a first port valve of said plurality of port valves to open a first port of said plurality of ports to allow fluid communication between a first longitudinal segment of the annular space and the inner bore of the tubular string;
- stimulating the formation surrounding said first longitudinal segment;
- measuring one or more fluid properties with a first sensor in said first longitudinal segment of the annular space and storing measured data at said reservoir stimulation tool;
- running said reservoir stimulation tool out of said wellbore;
- and
- after running said reservoir stimulation tool out of said wellbore, recovering said measured data for analysis at the surface.
Dependencies are inferred from the claim text.