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

非常规石油和天然气生产商的主要目标是以最低限度回收碳氢化合物 需要付出努力。油井产能是影响油气开发效率和利润率的关键因素。 恢复。局部地质构造，如断层，会影响水力压裂井的产能。 产能与裂缝过程中形成的裂缝网络的出现密切相关， 也就是说，裂缝是在空间上分布，还是集中在广泛的平面特征中。靠近断层 可以改变压裂过程中形成的裂缝网络的外观，然而， 断层距离和断裂网络之间的关系还知之甚少。在这里，我们将研究 在油井生产过程中流体通过裂缝网络的运移，以了解附近的 地震可以告诉我们裂缝形成的应力场。我们将使用震源 属性，以帮助约束应力场中的局部变化，并将变化与位置进行比较 已知的错误。然后我们将检查应力场和相关的裂缝网络之间的关系 对于水力压裂，试图推断应力场如何影响裂缝网络的外观， 也就是说，良好的生产率。然后，该案例研究的应力场和油井产能信息可以是 由加拿大进步能源有限公司直接使用，为未来的油井钻探选择最佳地点。 该项目将直接使Progress Energy受益，帮助他们提高油井生产率，以及 加拿大经济成为第二大天然气出口国。

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.