Postdoc: Computational Simulation of Hydrofracturing

博士后：水力压裂计算模拟

• 批准号: 9503981
• 负责人: Anthony Ingraffea
• 金额: $ 4.62万
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1997-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9503981&HistoricalAwards=false
• 关键词: Postdoc; Computational; Simulation; Hydrofracturing

9503981 Ingraffea The purpose of this project is to contribute to the development of a simulator for predicting initiation and near-wellbore propagation from cased, perforated, deviated wellbores. This simulator will function on both the IBM SP2 and on a distributed-workstation parallel computing environment, and will use state-of-the-art computational and representational methods and correctly propagate fluid-coupled fractures of arbitrary geometries. Hydraulic fracturing, widely used for stimulating oil and gas production is often unsuccessful for deviated (non-vertical) wellbores. However, the economical and environmental advantages of drilling inclined wellbores are overwhelming: thus, it is imperative that the stimulation techniques be improved. This includes detailed simulations of the hydrofracturing process. With an efficient simulator, the causes of hydrofracturing treatment failures can be analyzed, and new approaches can be investigated. The computational resources for modeling the geometrical and physical complexities presented by deviated wellbores have not been readily available to the field engineer, so there has been little motivation to create such a simulator. This situation is rapidly changing, and now a useful simulator must be able to model the multiple, non-planar, propagating cracks which interact and possibly intersect, as well as the highly non-linear coupling between the fluid flow in the fracture and the elastic response of the fractured rock. Current "three-dimensional" fracturing simulators are severely restricted in these areas.

该项目的目的是开发一种模拟器，用于预测套管井、射孔井和斜井的起裂和近井眼扩展。该模拟器将在IBM SP2和分布式工作站并行计算环境中运行，并将使用最先进的计算和表示方法，并正确地传播任意几何形状的流体耦合裂缝。水力压裂被广泛用于提高油气产量，但在斜度井（非垂直井）中往往不成功。然而，斜井钻井的经济和环境优势是压倒性的，因此，改进增产技术势在必行。这包括对水力压裂过程的详细模拟。通过一个高效的模拟器，可以分析水力压裂处理失败的原因，并研究新的方法。对于现场工程师来说，用于模拟斜度井的几何和物理复杂性的计算资源并不容易获得，因此创建这样一个模拟器的动机很小。这种情况正在迅速改变，现在一个有用的模拟器必须能够模拟相互作用和可能相交的多个非平面扩展裂缝，以及裂缝中流体流动与破裂岩石的弹性响应之间的高度非线性耦合。目前的“三维”压裂模拟器在这些领域受到严重限制。