Nowadays the energy sector is undergoing a milestone turn into more environmentally responsible green industry to comply with ‘’net zero by 2050’’ regulations. The clear goal is to reduce the footprint of the global greenhouse gases to alleviate the ongoing climate change. Through this transformation, the geothermal energy plays an essential part by emitting significantly less harmful carbon dioxide, being more environmentally friendly than fossil fuel energy sector. Apart from the differences in the design and overall approach from the geothermal wells with respect to the oil and gas wells, safety and integrity is invariably the uppermost common denominator. With this view, the monitoring of a well throughout its entire life is the most powerful instrument: from the early stage of drilling operations, to optimize trajectory and acquire formation evaluation data in real time to be able of taking immediate informed decisions, until the later stages of casing and cement operations, to evaluate the shear bond quality and inspect the casing integrity condition even after years.
This article describes a new set of high-temperature Logging-While-Drilling (LWD) and Pressure-While-Drilling (PWD) technologies for operating up to 210°C and will continue with defining the conventional methods as well as the state-of-the-art modern E-Line technologies for a comprehensive overview of the casing/cement integrity.