Systems and methods for facilitating operations of a well in an unconventional reservoir
AssigneeChevron U.S.A. Inc.
InventorsYula Tang, Yuanbo Lin, Suk Kyoon Choi, Jianlei Sun
Life of this patent
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Abstract
A hybrid modeling approach incorporates both physics-based reservoir modeling and machine learning technique to capture dynamic behavior of unconventional wells. Shut-in bottom hole pressure for unconventional wells are simulated for use as proxy for reservoir pressure in unconventional reservoirs. Production parameters for unconventional wells (e.g., gas/oil ratio, water cut, flowing bottom hole pressure, shut-in bottom hole pressure, productivity index) are determined for use in controlling the operations of unconventional wells.
Claims20
A system for controlling well operations in unconventional reservoirs, the system comprising:
- one or more physical processors configured by machine-readable instructions to:
- obtain operation information for a well in an unconventional reservoir, the operation information defining operation characteristics of the well;
- obtain production information for the well, the production information defining production characteristics of the well;
- determine historical flowing bottom hole pressure of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determine forecasted flowing bottom hole pressure of the well based on the historical flowing bottom hole pressure of the well;
- determine forecasted production characteristics of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determine forecasted drawdown pressure of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determine forecasted gas/oil ratio of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determine production parameters for the well based on the forecasted flowing bottom hole pressure of the well, the forecasted production characteristics of the well, the forecasted drawdown pressure of the well, and the forecasted gas/oil ratio of the well, the production parameters for the well including shut-in bottom hole pressure that serves as proxy for reservoir pressure in the unconventional reservoir;
- and
- facilitate one or more operations of the well based on the production parameters for the well.
A method for controlling well operations in unconventional reservoirs, the method comprising:
- obtaining operation information for a well in an unconventional reservoir, the operation information defining operation characteristics of the well;
- obtaining production information for the well, the production information defining production characteristics of the well;
- determining historical flowing bottom hole pressure of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determining forecasted flowing bottom hole pressure of the well based on the historical flowing bottom hole pressure of the well;
- determining forecasted production characteristics of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determining forecasted drawdown pressure of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determining forecasted gas/oil ratio of the well based on the operation characteristics of the well and/or the production characteristics of the well;
- determining production parameters for the well based on the forecasted flowing bottom hole pressure of the well, the forecasted production characteristics of the well, the forecasted drawdown pressure of the well, and the forecasted gas/oil ratio of the well, the production parameters for the well including shut-in bottom hole pressure that serves as proxy for reservoir pressure in the unconventional reservoir;
- and
- facilitating one or more operations of the well based on the production parameters for the well.
Dependencies are inferred from the claim text.