| Abstract |
Uncertainties in the thermal gradient profile in a geothermal well can directly impact the performance of drilling fluids and cements used in different well-construction applications. Gathering wellbore temperatures using conventional temperature sensing systems are usually limited to measurements of single values at specific depths, using individual sensor devices and gauges. This can limit the speed, accuracy, and resolution of temperature monitoring in many applications. In contrast, distributed temperature sensing (DTS), a technology that relies on fiber optics, offers a more efficient way to monitor changes in temperature in real time. By using an optical fiber as a continuous sensor device, DTS makes it possible to take readings of temperature every three feet along the fiber. This means that the operator is able to receive temperature information along the entire length of the wellbore where the optical fiber is deployed, leaving no areas unmonitored and minimizing uncertainty. This paper presents a discussion of the advantages of DTS technology in primary cementing applications. The use of DTS technology enables improved cementing designs by determining accurate wellbore temperatures that can be used to adjust critical slurry-design parameters to help ensure a successful operation. |