发明名称 |
MANAGED PRESSURE DRILLING WITH HYDRAULIC MODELING THAT INCORPORATES AN INVERSE MODEL |
摘要 |
A managed pressure drilling (MPD) operation may use an inverse model in conjunction with a hydraulic model and real-time drilling conditions and parameters as inputs to determine a wellhead pressure set point corresponding to a desired bottomhole pressure. For example, while drilling a wellbore penetrating a subterranean formation with a drilling system, measured data including a wellhead pressure may be acquired. A model may then be executed that applies a hydraulic model to an a priori model estimate vector to produce predicted data; converts the measured data to a measured data vector; applies a randomized maximum likelihood algorithm to the a priori model estimate vector, the predicted data, and the measured data vector to produce an a posterioiri model estimates; and applies the hydraulic model to the a posterioiri model estimates to produce an a posteriori prediction and a calculated wellhead pressure set point corresponding to a desired bottomhole pressure. |
申请公布号 |
US2016376859(A1) |
申请公布日期 |
2016.12.29 |
申请号 |
US201514898379 |
申请日期 |
2015.03.03 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
Mehrabian Amin;Teodorescu Sorin Gabriel;Jamison Dale E. |
分类号 |
E21B21/08;E21B41/00;G05B13/04;E21B44/00;E21B34/02;E21B21/10;E21B47/06 |
主分类号 |
E21B21/08 |
代理机构 |
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代理人 |
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主权项 |
1. A method comprising:
drilling a wellbore penetrating a subterranean formation with a drilling system; acquiring measured data from the drilling system, the measured data including a wellhead pressure of the drilling system; executing a model that includes:
applying a hydraulic model to an a priori model estimate vector to produce predicted data;converting the measured data to a measured data vector;applying a randomized maximum likelihood algorithm to the a priori model estimate vector, the predicted data, and the measured data vector to produce an a posterioiri model estimates; andapplying the hydraulic model to the a posterioiri model estimates to produce an a posteriori prediction and a calculated wellhead pressure set point that corresponds to a desired bottomhole pressure; and changing a wellhead pressure set point based on the calculated wellhead pressure set point. |
地址 |
Houston TX US |