Abstract
A fibre optic DTS system was installed on Brunei Shell's South West Ampa (SWA) 293 well to allow real-time measurement of the temperature profile along well bore and open hole producing section. The object was to infer the inflow production profile of the well. Although fibre optic distributed temperature systems are now commonly used in different types of well applications, this particular application posed a significant challenge requiring the system to be installed in a horizontal well bore and monitor data located within a 2 degree Celsius geothermal temperature range.
Thermal simulations suggested that the inflow profiles could be used to determine whether flow was being produced from the heel, toe or distributed along the open hole section - despite the expected small degree of temperature change. In addition, the simulations suggested qualitative changes in time related to production changes associated with gas and/or water breakthrough could be identified along the horizontal producing section. This information was used to impact future development well designs, location of horizontal sections within the reservoir and planned length of horizontal.
SWA 293 well design and installation considerations will be presented along with findings and interpretations of the temperature survey results from the distributed temperature system installation.
