Data-driven multiscale geomechanical modeling of unconventional shale gas reservoirs: a case study of Duvernay Formation, Alberta, West Canadian Basin

IF 2 3区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Frontiers in Earth Science Pub Date : 2024-09-03 DOI:10.3389/feart.2024.1437255

Yue Xiao, Weidong Jiang, Chong Liang

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Abstract

The Duvernay Formation in Canada is one of the major oil and gas source formations in the Western Canadian Sedimentary Basin, located at its deepest point. While it demonstrates promising development potential, challenges arise in the urgent need for integration of geology and engineering models, as well as in optimizing sweet spots, particularly as infill wells and pads become central operational objectives for the shale gas field. A lack of the geomechanical understanding of shale gas reservoirs presents a significant obstacle in addressing these challenges. To overcome this, we implemented data acquisition and prepared historical models and profiles, resulting in an extended high-resolution geological and reservoir property model with a fine grid system. Subsequently, a 3D full-field multi-scale geomechanical model was constructed for the main district by integrating seismic data (100 m), geological structures (km), routine logs (m), core data (cm), and borehole imaging (0.25 m), following a well-designed workflow. The predicted fracturability index (brittleness) ranges from 0.6 to 0.78, and a lower horizontal stress difference (STDIFF) is anticipated in the target formation, Upper Duvernay_D, making it a favorable candidate for hydraulic fracturing treatment. Post-analysis of the multi-disciplinary models and various data types provides guidelines for establishing a specific big database, which serves as the foundation for production performance analysis and aggregate sweet spot analysis. Fourteen geological and geomechanical candidate parameters are selected for the subsequent sweet spot analysis. This study highlights the effectiveness of multi-scale geomechanical modeling as a tool for the integration of multi-disciplinary data sources, providing a bridge between geological understanding and future field development decisions. The workflows also offer a data-driven framework for selecting parameters for sweet spot analysis and production dynamic analysis.

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非常规页岩气储层的数据驱动多尺度地质力学建模：加拿大西部盆地阿尔伯塔省 Duvernay Formation 案例研究

加拿大的 Duvernay 地层是加拿大西部沉积盆地的主要油气源地层之一，位于盆地最深处。虽然该地层显示出巨大的开发潜力，但面临的挑战是迫切需要整合地质和工程模型，以及优化甜点，特别是当填充井和垫层成为页岩气田的核心运营目标时。缺乏对页岩气储层地质力学的了解是应对这些挑战的重大障碍。为了克服这一问题，我们进行了数据采集，并准备了历史模型和剖面图，从而建立了一个具有精细网格系统的扩展高分辨率地质和储层属性模型。随后，我们按照精心设计的工作流程，通过整合地震数据（100 米）、地质结构（千米）、常规测井（米）、岩心数据（厘米）和井眼成像（0.25 米），构建了主区的三维全场多尺度地质力学模型。预测的可裂性指数（脆性）在 0.6 至 0.78 之间，预计目标地层上杜维奈_D 的水平应力差（STDIFF）较低，是水力压裂处理的有利候选地层。对多学科模型和各种数据类型的后期分析为建立特定的大数据库提供了指导，该数据库是生产性能分析和总体甜点分析的基础。为后续的甜点分析选取了 14 个地质和地质力学候选参数。这项研究凸显了多尺度地质力学建模作为整合多学科数据源工具的有效性，为地质认识和未来油田开发决策之间架起了一座桥梁。工作流程还提供了一个数据驱动框架，用于为甜点分析和生产动态分析选择参数。

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来源期刊

Frontiers in Earth Science Earth and Planetary Sciences-General Earth and Planetary Sciences

CiteScore

3.50

自引率

10.30%

发文量

2076

审稿时长

12 weeks

期刊介绍： Frontiers in Earth Science is an open-access journal that aims to bring together and publish on a single platform the best research dedicated to our planet. This platform hosts the rapidly growing and continuously expanding domains in Earth Science, involving the lithosphere (including the geosciences spectrum), the hydrosphere (including marine geosciences and hydrology, complementing the existing Frontiers journal on Marine Science) and the atmosphere (including meteorology and climatology). As such, Frontiers in Earth Science focuses on the countless processes operating within and among the major spheres constituting our planet. In turn, the understanding of these processes provides the theoretical background to better use the available resources and to face the major environmental challenges (including earthquakes, tsunamis, eruptions, floods, landslides, climate changes, extreme meteorological events): this is where interdependent processes meet, requiring a holistic view to better live on and with our planet. The journal welcomes outstanding contributions in any domain of Earth Science. The open-access model developed by Frontiers offers a fast, efficient, timely and dynamic alternative to traditional publication formats. The journal has 20 specialty sections at the first tier, each acting as an independent journal with a full editorial board. The traditional peer-review process is adapted to guarantee fairness and efficiency using a thorough paperless process, with real-time author-reviewer-editor interactions, collaborative reviewer mandates to maximize quality, and reviewer disclosure after article acceptance. While maintaining a rigorous peer-review, this system allows for a process whereby accepted articles are published online on average 90 days after submission. General Commentary articles as well as Book Reviews in Frontiers in Earth Science are only accepted upon invitation.