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arXiv 2606.17331cs.LG
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不确定性下的决策驱动地质导向:序列决策优化的统一框架

Decision-Driven Geosteering Under Uncertainty: A Unified Framework for Sequential Decision Optimization

NORCE Research Centre(NORCE研究机构);University of Stavanger(斯塔夫anger大学);Stanford University(斯坦福大学)

Hibat Errahmen Djecta, Sergey Alyaev, Kristian Fossum, Reidar B. Bratvold, Ressi Bonti Muhammad, Apoorv Srivastava

AI总结:

提出一个将粒子滤波与强化学习结合的地质导向框架,通过显式建模地质不确定性并评估三种决策策略,实现稳定且高效的井轨迹实时优化。

摘要:

地质导向需要在未知地质构造中导航井轨迹,同时根据钻井过程中获取的间接测量值顺序更新决策。本文提出一个不确定性感知的地质导向框架,该框架将用于概率性地下解释的粒子滤波与用于序列决策的基于价值的强化学习紧密结合。钻头前方的地质不确定性通过粒子滤波显式表示,从而实现基于信念的控制而非确定性轨迹校正。该框架将粒子滤波信念更新与信念感知决策策略耦合,并评估在相同不确定性表示下运行的三种决策选项:一种可解释的近似动态规划方案、一种深度Q学习基线,以及一种采用目标Q网络方案训练以保持稳定性的双深度强化学习架构,该架构使用对偶(价值/优势)分解进行Q值参数化。除了最终的放置性能外,我们还使用衡量随时间变化的转向平滑度的稳定性指标评估策略行为,从而提供关于决策策略如何随不确定性演变而响应的额外操作洞察。该框架集成了一个API,用于在工业地质导向模拟器中在真实测量噪声和钻井约束下进行验证。通过在所有方法中使用相同的地质实现、操作限制和奖励定义,实验提供了对替代决策策略在整个钻井过程中行为的受控和高保真评估,而不仅仅是根据最终井轨迹评估性能。

英文摘要:

Geosteering requires navigating a well trajectory through an unknown geological configuration, while sequentially updating decisions based on indirect measurements acquired during drilling. This work presents an uncertainty-aware geosteering framework that tightly integrates particle filtering for probabilistic subsurface interpretation with value-based reinforcement learning for sequential decision-making. Geological uncertainty ahead of the drill bit is represented explicitly through a particle filter (PF), enabling belief-informed control rather than deterministic trajectory correction. The framework couples PF belief updates with belief-informed decision policies and evaluates three decision-making options that operate under identical uncertainty representations: an interpretable Approximate Dynamic Programming (ADP) scheme, a Deep Q-learning baseline, and a Dual Deep Reinforcement Learning (Dual DRL) architecture trained with a target Q-network scheme for stability, using a dueling (value/advantage) decomposition for Q-value parameterization. Beyond final placement performance, we assess policy behavior using stability-oriented metrics that quantify steering smoothness over time, providing additional operational insight into how decision policies respond as uncertainty evolves. The framework is integrated with an API for validation within an industrial geosteering simulator under realistic measurement noise and drilling constraints. Using identical geological realizations, operational limits, and reward definitions across methods, the experiments provide a controlled and high-fidelity evaluation of how alternative decision policies behave throughout the drilling process, rather than evaluating performance solely from the final well trajectory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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