Multilateral well leads to inefficient stimulation treatments
To offset the natural decline in a field discovered in the late 1950s
and optimize extraction of oil and gas, Kuwait Oil Company (KOC) had applied
many different technologies, including water injection, multilateral wells, and
targeted stimulation treatments.
In one multilateral well, KOC needed to isolate and inject stimulation
fluids into the main wellbore and the lateral. However, conventional
bullheading could result in fluids going into the wrong wellbore. The only way
to successfully bullhead both zones would require a series of runs—which
could take 4 or more days.
ACTive Straddle packer eliminates multiple runs
Schlumberger worked closely with KOC to find a way to eliminate multiple
runs and the associated time, risk, and costs. Using the ACTive family of live
downhole coiled tubing services, Schlumberger deployed an ACTive services
bottomhole assembly and its integrated casing collar locator (CCL) to set
ACTive Straddle packers and treat the well in a single run.
First, the packers were set and inflated at 6,953 ft [2,119 m], just 40
ft above a closed valve in the primary wellbore. ACTive TC live CT tension and
compression tool provided downhole load measurements, confirming the packers
were securely anchored in place before targeted injection. The same packers
were placed and inflated across the lateral—with the lower packer at
6,603 ft [2,013 m]. After the second injection treatment, the packers were
deflated and the system was pulled to surface and rigged down.
KOC stimulates multilateral well in one run and in half the
Schlumberger and KOC successfully restored the well's production to
6,300 bbl/d while dramatically reducing nonproductive time. ACTive Straddle
packers made it possible for KOC to inject stimulation fluids into two separate
zones in just one run instead of four. The entire job took less than 2
days—half the time it would have taken with conventional
methods—and the ACTive Straddle packer is now deployed in additional
wells that face similar challenges.