The suggestion that there is a host of noises in the ground under our feet may seem strange. However, the rock underneath us is not just one solid inactive object. There are various rock types with different physical properties. They have tiny pores that can harbour gas or fluids. Oil wells are drilled through several … Continue reading Noises underground?
Distributed Optical Sensing (DOS) utilises optical fibre as the sensor, effectively creating thousands of sensor points along the fibre, all acquiring continuously and instantaneously at the same time by sensing at the speed of light. What is Distributed Acoustic Sensing (DAS)? DAS is a DOS application, i.e. it works with optical fibre as a sensor. … Continue reading A million microphones downhole
Oil wells are drilled through layers of rock to access the reservoir below. These artificially introduced holes must be stabilised with a wall structure composed of so-called casings. This prevents the borehole from collapsing and isolates it from any unwanted fluid or gas exchange with the environment. Peruse this great educational article on casings for … Continue reading Well casings – More than just walls
What is distributed sensing? Distributed sensing utilises optical fibre itself as the sensor, effectively creating thousands of sensor points along the fibre, all acquired continuously and instantaneously at the same time by sensing at the speed of light. Even though an optical signal is being processed, acoustic and temperature changes can be measured with fibre … Continue reading Turning light into insight – Distributed sensing