arXiv:2506.17747physics.geo-phcs.CE2025-06被引 5

用AI从地质数据生成高精度油藏模型,提升油气田开发决策效率。

Pix2Geomodel: A Next-Generation Reservoir Geomodeling with Property-to-Property Translation

  • 基于Pix2Pix的生成对抗网络,实现属性到属性的图像化建模。
  • 岩相预测准确率达88%,水饱和度达96%,整体性能优于传统方法。
  • 适合油气勘探、地质建模人员及人工智能跨学科研究者使用。

精准地质建模对油藏表征至关重要,但传统方法难以处理复杂地下非均质性且难于约束观测数据。本研究提出Pix2Geomodel,一种基于Pix2Pix的条件生成对抗网络框架,用于预测格罗宁根气田罗特利根储层的岩相、孔隙度、渗透率和水饱和度。利用荷兰石油公司提供的760万单元数据集(通过EPOS-NL获取),经预处理与数据增强后,每类属性生成2350张图像,并在19,000步内训练包含U-Net生成器和PatchGAN判别器的模型。评估指标包括像素准确率(PA)、平均交并比(mIoU)、频率加权交并比(FWIoU)及可视化分析,结果表明:岩相预测表现优异(PA 0.88,FWIoU 0.85),水饱和度极高(PA 0.96,FWIoU 0.95),孔隙度与渗透率中等(分别为PA 0.70/0.74,FWIoU 0.55/0.60),属性间转换亦表现稳健(如岩相到岩相:PA 0.98,FWIoU 0.97)。模型捕捉了空间变异性与地质真实性,经变异函数验证。训练损失曲线分别绘制各属性的生成器与判别器变化。相比传统方法,该框架在直接属性映射上具备更高保真度。局限在于微结构差异与二维假设,未来可融合多模态数据与三维建模(Pix2Geomodel v2.0)。本研究推动生成式AI在地球科学中的应用,助力油藏管理与开放科学。

原文摘要 · Abstract (English)

Accurate geological modeling is critical for reservoir characterization, yet traditional methods struggle with complex subsurface heterogeneity, and they have problems with conditioning to observed data. This study introduces Pix2Geomodel, a novel conditional generative adversarial network (cGAN) framework based on Pix2Pix, designed to predict reservoir properties (facies, porosity, permeability, and water saturation) from the Rotliegend reservoir of the Groningen gas field. Utilizing a 7.6 million-cell dataset from the Nederlandse Aardolie Maatschappij, accessed via EPOS-NL, the methodology included data preprocessing, augmentation to generate 2,350 images per property, and training with a U-Net generator and PatchGAN discriminator over 19,000 steps. Evaluation metrics include pixel accuracy (PA), mean intersection over union (mIoU), frequency weighted intersection over union (FWIoU), and visualizations assessed performance in masked property prediction and property-to-property translation tasks. Results demonstrated high accuracy for facies (PA 0.88, FWIoU 0.85) and water saturation (PA 0.96, FWIoU 0.95), with moderate success for porosity (PA 0.70, FWIoU 0.55) and permeability (PA 0.74, FWIoU 0.60), and robust translation performance (e.g., facies-to-facies PA 0.98, FWIoU 0.97). The framework captured spatial variability and geological realism, as validated by variogram analysis, and calculated the training loss curves for the generator and discriminator for each property. Compared to traditional methods, Pix2Geomodel offers enhanced fidelity in direct property mapping. Limitations include challenges with microstructural variability and 2D constraints, suggesting future integration of multi-modal data and 3D modeling (Pix2Geomodel v2.0). This study advances the application of generative AI in geoscience, supporting improved reservoir management and open science initiatives.

地质建模生成对抗网络油藏工程AI赋能

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