Iterative drilling simulation process for enhanced economic decision making
First Claim
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1. A method for enhanced decision making based on optimization of a drilling system using an economic evaluation factor comprising:
- generating a first economic evaluation factor for the drilling system by using an iterative drilling simulation of a well bore in a formation based on a drilling simulation model having at least one of the following formation characteristics selected from the group consisting of lithology, rock strength, shale plasticity and porosity and a drilling mechanics parameter;
determining whether the first economic factor achieves a desired optimization;
varying the drilling mechanics parameter of the drilling system based on the determination such that the iterative drilling simulation generates a second economic evaluation factors;
determining whether the second economic evaluation factor achieves the desired optimization;
selecting the drilling mechanics parameter from the group consisting of bit type, bit diameter, bit cutting structure 3D (three dimensional) model, bit work rating, bit junk slot area, bit total flow area (TFA), bit pressure drop, impact force, jet velocity and drill bit costs;
continuing the iterative drilling drilling simulation of the well bore until the desired optimization is achieved; and
modifying the iterative drilling simulation to take into account drill bit enhancements.
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Abstract
An iterative drilling simulation method and system for enhanced economic decision making includes obtaining characteristics of a rock column in a formation to be drilled, specifying characteristics of at least one drilling rig system; and iteratively simulating the drilling of a well bore in the formation. The method and system further produce an economic evaluation factor for each iteration of drilling simulation. Each iteration of drilling simulation is a function of the rock column and the characteristics of the at least one drilling rig system according to a prescribed drilling simulation model.
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Citations
22 Claims
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1. A method for enhanced decision making based on optimization of a drilling system using an economic evaluation factor comprising:
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generating a first economic evaluation factor for the drilling system by using an iterative drilling simulation of a well bore in a formation based on a drilling simulation model having at least one of the following formation characteristics selected from the group consisting of lithology, rock strength, shale plasticity and porosity and a drilling mechanics parameter; determining whether the first economic factor achieves a desired optimization; varying the drilling mechanics parameter of the drilling system based on the determination such that the iterative drilling simulation generates a second economic evaluation factors; determining whether the second economic evaluation factor achieves the desired optimization; selecting the drilling mechanics parameter from the group consisting of bit type, bit diameter, bit cutting structure 3D (three dimensional) model, bit work rating, bit junk slot area, bit total flow area (TFA), bit pressure drop, impact force, jet velocity and drill bit costs; continuing the iterative drilling drilling simulation of the well bore until the desired optimization is achieved; and modifying the iterative drilling simulation to take into account drill bit enhancements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A program product for enhanced decision making to recommend a drilling rig system using an economic evaluation factor to achieve a desired optimization of the drilling rig system comprising:
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a computer-usable medium; and computer instructions encoded in the computer-usable medium, wherein the computer instructions, when executed, cause a computer to perform operations comprising; generating a first economic evaluation factor for the drilling rig system by using an iterative simulation of drilling a well bore in a rock column of a formation based on a drilling simulation model; including a drilling mechanics parameter in the drilling simulation model; selecting the drilling mechanics parameter from the group consisting of bit type, bit diameter, bit cutting structure 3D (three dimensional) model, bit work rating, bit junk slot area, bit total flow area (TFA), bit pressure drop, impact force, jet velocity and drill bit costs; determining whether the first economic factor achieves a desired optimization; based on the determination, varying the drilling mechanics parameter such that the drilling simulation model generates a second economic evaluation factor and determines whether the second economic evaluation factor achieves the desired optimization; generating at least one recommendation including a list of drilling equipment; and modifying the iterative drilling simulation to take into account drill bit enhancements. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of enhanced decision making for the recommendation of a drill bit for a drilling system based on an economic evaluation factor comprising:
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generating a first economic evaluation factor for the drilling system by using an iterative drilling simulation of a well bore in a formation based on drilling mechanics parameters of a drill bit used in the drilling system; determining whether the first economic factor achieves a desired optimization; based on the determination, varying the drilling mechanics parameter of the drill bit such that the iterative drilling simulation generates a second economic evaluation factor and determines whether the second economic evaluation factor achieves the desired optimization; generating a preliminary recommendation based on the economic evaluation factor that achieved the desired optimization, the preliminary recommendation including a list of drilling rig components selected from the group consisting of rotary table, top drive, drill string, drilling fluid pumps, bottom hole assembly, hoisting equipment, down hole motor, downhole turbine, rotary steerable system and drill bit for use in the drilling system; modifying the iterative drilling simulation to take into account drill bit enhancements; and selecting at least one of the drilling mechanics parameter of the drill bit from a group consisting of a bit type, bit diameter, bit cutting structure 3D (three dimensional) model, bit work rating, bit junk slot area, bit total flow area (TFA), bit pressure drop, impact force, jet velocity and drill bit costs. - View Dependent Claims (22)
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Specification