Investigating local stress variations inferred from earthquake properties in proximity to a hydraulic fracture well.

研究从水力压裂井附近的地震特性推断出的局部应力变化。

• 批准号: 477868-2015
• 负责人: Harrington, Rebecca
• 金额: $ 1.81万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=579143
• 关键词: Investigating; local; stress; variations; inferred

The primary goal of non-conventional oil and gas producers is to recover hydrocarbons with the minimum required effort. Well productivity is a key factor influencing the efficiency and profitability in oil or gas recovery. Local geologic structure, such as faults, can influence the productivity of hydraulic fracturing wells. Productivity is strongly linked to the appearance of the fracture network formed during the fracture process, i.e., whether fractures are distributed in space, or concentrated into broad, planar features. Proximity to faults can change the appearance of the network of fractures formed during the fracturing process, however, the relationship between fault distance and the fracture network is poorly understood. Here we will study the migration of fluids through the fracture network creating during well production to learn what the nearby earthquakes can tell us about the stress field in which the fractures form. We will use the earthquake source properties to help constrain the local variations in the stress field, and compare the variations with the location of known faults. We will then examine the relationship between the stress field and the fracture network related to hydraulic fracturing to try and infer how the stress field influences the appearance of the fracture network, i.e., well productivity. The information on stress field and well productivity for this case study can then be directly used by the company, Progress Energy Canada, Ltd. to select the optimal sites for drilling a future well. This project will directly benefit Progress Energy by helping them increase well productivity, as well benefit the Canadian economy as the second largest exporter of natural gas.

非常规油气生产商的首要目标是用最少的资源回收碳氢化合物。 需要付出努力。油井产能是影响石油或天然气效率和盈利能力的关键因素 恢复。断层等局部地质结构会影响水力压裂井的产能。 生产率与断裂过程中形成的裂缝网络的外观密切相关， 即裂缝是分布在空间中，还是集中在广泛的平面特征中。距离故障的远近 可以改变压裂过程中形成的裂缝网络的外观，但是， 断层距离与裂缝网络之间的关系知之甚少。在这里我们将研究 流体通过油井生产过程中产生的裂缝网络迁移，以了解附近的情况 地震可以告诉我们裂缝形成的应力场。我们将使用地震源 属性有助于约束应力场的局部变化，并将变化与位置进行比较 已知的故障。然后我们将检查应力场和相关裂缝网络之间的关系 水力压裂尝试并推断应力场如何影响裂缝网络的外观， 即良好的生产力。本案例研究的应力场和油井产能信息可以是 Progress Energy Canada, Ltd. 直接使用它来选择未来钻井的最佳地点。 该项目将直接使 Progress Energy 受益，帮助他们提高油井产能，并受益 加拿大经济作为第二大天然气出口国。