WellWatcher Flux system provided permanent monitoring across
WellWatcher Flux multizonal reservoir monitoring system addresses the
challenge of acquiring reservoir data in real time across the sandface of wells
with multistage completions. Large-bore inductive couplers provide wireless
power and data transmission between upper, intermediate, and lower completions.
The system requires no modification to the rest of the completion
This first installation in a three-stage completion was carefully
planned. A significant amount of engineering effort contributed to the
development of new coupler sizes, higher shock ratings for the sensors with
added fault-tolerant wiring configuration, new packer sizes with very
aggressive work envelopes, ancillary components, and data transmission hardware
and software. A new visualization and analysis software package was also
developed. Close cooperation between the operator and Schlumberger led to
innovative solutions and timely execution of the project.
Arrays of miniaturized digital temperature sensors were installed on the exterior of the lower completion liner and cemented in place. With a resolution of 0.003 degC at a 1-min sample rate, these sensors can detect extremely small changes in temperature, which are interpreted using thermal modeling and analysis software.