用生成式AI实时优化钻井路径,提升油气与地热开发效率
DISTINGUISH Workflow: A New Paradigm of Dynamic Well Placement Using Generative Machine Learning
- 结合GAN与动态规划,实现地质模型的实时更新与钻井决策
- 原型系统在基准案例中显著降低地质不确定性,提升预测精度
- 适合能源勘探、地热开发等需要实时钻井优化的场景
定向钻井中的实时地质导向(geosteering)对油气开采及地热能、二氧化碳封存等新兴应用至关重要。业界亟需一种可实时更新地下不确定性并融合最新观测数据的自动化地质导向流程。本文提出「DISTINGUISH」:一种基于生成对抗网络(GAN)进行地质参数化、集成方法更新模型、全局离散动态规划(DDP)优化复杂决策的AI驱动工作流。该框架通过离线训练的GAN生成地质模型实现实例,并使用前馈神经网络(FNN)模拟测井随钻(LWD)工具响应。这是首个能逐步缩小钻头前后地质模型不确定性的流程,并自动调整井位规划。系统将实时LWD数据与基于DDP的决策支持融合,提升钻进前方地质预测能力,优化导向决策。本文展示一个代表性基准案例及其性能表现,为未来方法演进提供基础。
原文摘要 · Abstract (English)
The real-time process of directional changes while drilling, known as geosteering, is crucial for hydrocarbon extraction and emerging directional drilling applications such as geothermal energy, civil infrastructure, and CO2 storage. The geo-energy industry seeks an automatic geosteering workflow that continually updates the subsurface uncertainties and captures the latest geological understanding given the most recent observations in real-time. We propose "DISTINGUISH": a real-time, AI-driven workflow designed to transform geosteering by integrating Generative Adversarial Networks (GANs) for geological parameterization, ensemble methods for model updating, and global discrete dynamic programming (DDP) optimization for complex decision-making during directional drilling operations. The DISTINGUISH framework relies on offline training of a GAN model to reproduce relevant geology realizations and a Forward Neural Network (FNN) to model Logging-While-Drilling (LWD) tools' response for a given geomodel. This paper introduces a first-of-its-kind workflow that progressively reduces GAN-geomodel uncertainty around and ahead of the drilling bit and adjusts the well plan accordingly. The workflow automatically integrates real-time LWD data with a DDP-based decision support system, enhancing predictive models of geology ahead of drilling and leading to better steering decisions. We present a simple yet representative benchmark case and document the performance target achieved by the DISTINGUISH workflow prototype. This benchmark will be a foundation for future methodological advancements and workflow refinements.
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