Characterization of Multi-Scale Discrete Fracture Network Systems in Unconventional Reservoirs Using Dynamic Data

使用动态数据表征非常规油藏多尺度离散裂缝网络系统

• 批准号: RGPIN-2017-05779
• 负责人: Leung, Juliana
• 金额: $ 2.04万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638305
• 关键词: Characterization; Multi; Scale; Discrete; Fracture

Development of unconventional tight or shale reservoirs has received much attention in recent years because of the large resource estimates worldwide. Horizontal wells with multi-stage hydraulic fracturing are drilled to enhance reservoir contact area and to achieve economic production rates. This stimulation technique is particularly efficient if hydraulic fractures can connect to sweet spots due to the presence of existing fractures. A tight/shale reservoir can be conceptualized as a dual-medium with two distinct sub-systems: matrix and fracture. The time scales for flow in the two systems differ significantly due to the high contrast in their permeability. The matrix has a very low in-situ permeability, while the fracture is a local discontinuity with a very high permeability. Fractures can be large and localized around the wellbore (e.g., hydraulic fractures) or small and located away from the stimulated zone (e.g., micro fractures). It should be noted that this proposal focuses on in-situ development of shale/tight oil/gas reservoirs, while surface mining of oil shale is not considered.

由于全世界的资源估计很大，近年来，非常规紧身或页岩储层的开发受到了很多关注。钻有多阶段液压压裂的水平井，以增强储层接触面积并达到经济生产率。如果由于现有裂缝的存在，液压裂缝可以连接到甜点，则这种刺激技术尤其有效。紧密/页岩储层可以被概念化为具有两个不同子系系统的双中间：矩阵和断裂。由于其渗透性的高对比度，这两个系统中流量的时间尺度显着差异。矩阵的原位渗透性非常低，而断裂是局部不连续性，具有很高的渗透性。裂缝可以很大，可以围绕井眼（例如液压裂缝）或小，并且位于刺激区域（例如微断裂）。应当指出的是，该提案的重点是页岩/紧密的油/天然气储层的原位开发，而没有考虑油页岩的地面采矿。