Distributed acoustic sensors for monitoring microseismicity and CO2 storage in partnership with Silixa

该项目涉及一项迅速发展的技术，该技术使用光纤电缆作为分布式传感器，其实质是作为地震检波器或地震仪的连续阵列。这些新型传感器应用广泛，成本低，可以在恶劣的环境(高温和低温)下工作，而且相对便宜和易于操作。项目合作伙伴Silixa的iDASTM系统开创了这种技术的先河。分布式声波传感器(DAS)已经成功地被Silixa用于记录垂直地震剖面或VSP(可控震源地面地震能量的钻孔记录)。在拟议的项目中，使用这种传感器在地质水库中的二氧化碳储存点记录的地震数据将用于评估储存点的行为和机械完整性。该项目的一个具体目标是开发探测微震事件的DAS技术。学生将学习如何使用干涉方法处理DAS数据，然后解决定位地震事件和计算其震级的具体挑战。

This project involves a rapidly growing technology that uses fibre optic cables as distributedsensors, which in essence act as a continual array of geophones or seismometers. Thesenovel sensors have a wide range of applications, are low cost, can operate in harshenvironments (high and low temperatures), and are relatively cheap and easy to operate.The project partner, Silixa, has pioneered such technology with their iDASTM system.Distributed acoustic sensors (DAS) have been used successfully by Silixa in recordingvertical seismic profiles or VSPs (borehole recordings of controlled-source surface seismicenergy). In the proposed project, seismic data recorded using such sensors at a site of CO2storage in a geologic reservoir will be used to assess the behaviour and mechanical integrityof the storage site. A specific aim of the project involves the development of DAStechnology to detect microseismic events. The student will learn how DAS data areprocessed using interferometric methods, before addressing specific challenges of locatingseismic events and calculating their magnitudes.