Challenges
Well had previous casing damage.
Casing Patch at 4000 ft, located above KOP.
Solution
Utilize KLX HC Composite Bridge Plug to isolate each stage to ensure proper zone targeting.
The KLX HC Composite Bridge Plug also has a narrow OD that allows a seamless passage through Casing Patch.
Results
All 19 plugs set properly and drilled up with an average time of 6.5 minutes.
Composite bridge plugs present a simple solution to the issues associated with problematic casing, zonal isolation or for instance to kill a wellbore. This case study dives into an instance when a composite bridge plug was utilized to isolate the pay zones of each stage after a casing patch was installed. KLX Energy Services offers a composite bridge plug in a variety of sizes and weight classes for any of your completion-based needs.
On November 10th, 2022 KLX Energy Services was requested to provide nineteen composite bridge plugs for deployment in this wellbore. In the summer of 2022, the customer was stimulating this same well when they had encountered an issue with the casing and had to cease stimulation. They patched the casing around 4,040 ft in the vertical section of the wellbore. Due to this instance our sales representative and the customer felt it necessary that the composite bridge plugs would be the best avenue to isolate the pay zones, ensure that each stage was properly stimulated, and that the patch was not leaking. There are a few challenges associated with composite frac plugs that the bridge plug does not have, for example, if there is fluid movement from below a frac plug the ball would come off the seat and you can be stimulating multiple pay zones instead of the intended stage.
On this well, wireline utilized a shorty setting tool string with a standard slow burn charge to set all 19 plugs. The first plug was set at 15,488 ft. Wireline achieved a max and an average line speed during pumpdown of 270 and 232 feet per minute respectively with an average line tension of 1,170 lbf.
Pumpdown averaged 14.75 barrels per minute with a maximum pumpdown of 15 barrels per minute. The final plug was set at 11,844 ft and the final stage was stimulated. Average treating pressure was reported at 7,382 psi, max pressure reaching 7,941 psi.
KLX Energy Services was called to drillout and cleanout out this well after stimulation was complete. This provided us with the opportunity to analyze the data of these plugs more thoroughly. KLX Energy utilized a coil tubing BHA with a 4 5/8” varel bit. Average fluid rate was 4 barrels per minute with a max rate of 4.5 BPM. The coil tubing team was able to achieve an average drillout time for 19 plugs at just under 6.5 minutes. All cuttings that returned to surface were granule and blended with sand returns. KLX Energy Services would like to note that all plugs were tagged shallower than that of wirelines setting depth tags. For example, the depth of plug #1 was set at 15,488 ft but coil tagged at 15,457 ft. All 19 plugs were tagged approximately 20 feet shallower than they were supposedly set. KLX Energy Services noted this as a difference in logging tools and calibration.
