Published: 03/24/2015
Published: 03/24/2015
Maximizing recovery in extended-reach horizontal wells requires multizone stimulation and advanced reservoir fluids management. In homogeneous formations, significant pressure drops occur as fluids flow from TD toward the heel of the well, and in many wells, this can prematurely end the well's productive life and leave substantial reserves untouched. Completions usings ICDs enable engineers to adjust flow from zones with uneven pressure or early water breakthrough.
Over time, fines migration led to plugged ICDs and diminished production in two of the Kuwait Oil Company's wells in the Minagish and Sabriyah fields. With more than 20 ICDs in each well, Kuwait Oil Company needed to identify and selectively clean out the problematic ICDs and restore production with minimal downtime.
Several isolated zones in the completion had multiple ICDs, making the discovery process especially challenging. Schlumberger ran ACTive DTS Inversion analysis via real-time, fiber-optic coiled tubing to collect continuous temperature profiles along the length of the wellbore. This data helped engineers determine the specific zones that needed treatment.
With the zones identified, Schlumberger performed a single multiset ACTive Straddle packer run to selectively clean out the plugged ICDs in each well—eliminating the need for a workover rig. ACTive Straddle packers were set on the selected ICDs and monitored using the ACTive family of live downhole coiled tubing services to clean the devices and confirm treatment in real time.
This innovative coiled tubing intervention using ACTive services helped Kuwait Oil Company more than double production in both wells while saving more than a week of intervention time compared with conventional methods. The time saved by using ACTive services instead of conventional treatment resulted in producing 50,000 bbl of oil. In Well A, production increased by 150% from 480 bbl/d to 1,200 bbl/d. Production from Well B increased 171%—from 2,100 bbl/d to 5,700 bb/d.
Challenge: Identify and clean specific inflow control devices (ICDs) in wells with dozens of possible areas of interest—even within the same zone
Solution:
Results:
