For this job, the Well Tractor® would provide conveyance in the horizontal part of the well while the Well Stroker® and Well Key® would open the frac sleeves. In addition, the toolstring included a casing collar locator (CCL) to coordinate depth. The type of frac sleeves used in this well did not include shifting profiles, so the Well Key® was configured with high-friction pads.In this case, the Well Tractor® conveyed the toolstring past the sleeve to record all assembly signatures. The toolstring depth was then corrected to position the Well Key® high-friction pads in the center of the frac sleeve. After confirming the toolstring’s position, the Well Stroker® stroked up to compress the stroker rod, the key pads were opened, and the Well Stroker® then stroked down to shift the sleeve into the open position. Surface read out (SRO) data then confirmed whether or not the sleeve had shifted based on the force applied and the length of the Well Stroker. Welltec® repeated this method throughout the lateral, shifting open a total of 20 frac sleeves in one run.
This operation demonstrates Welltec’s ability to configure its tools to provide new solutions for complex operations—in this case, using the Well Stroker® and Well Key® to shift open multicycle, full-bore frac sleeves. During the operation, Welltec’s solution provided proof to the client that the sleeves were shifted. The CCL provided accurate depth control and identified the frac sleeve position—open or closed.
The supplied WL unit and personnel ran on a 24-hour operation schedule and managed to shift open 20 frac sleeves in under 24 hours during one run. The toolstring was run in hole at 8:40 a.m., and the last of the 20 frac sleeves was shifted open at 7:16 a.m. the following day. And, as the operation progressed and more SRO data were acquired, the operation became more efficient, effectively reducing time between sleeves with no tool issues or failures once sleeve shifting commenced.
Welltec’s solution is a step towards a simplified, single-run solution to optimize injection wells for the water flood program.