The operator’s challenges

Repsol needed to increase the ROP in the curve, drill the curve and lateral in a single run, and avoid compromising dogleg severity (DLS) or performance in order to meet the plan requirements.

What they tried first

Before using the NeoSteer CL ABBS, Repsol used a conventional 2-run solution—but it did not enhance job performance.

What Schlumberger recommended

Schlumberger proposed using the NeoSteer CL ABSS with a HyperBlade hyperbolic diamond element bit to improve ROP in the soft formations in the curve section and eliminate a trip to change the BHA.

What happened

Using the NeoSteer CL ABSS, Repsol drilled the curve sections at an average ROP of 160 ft/h and an average lateral ROP of 286 ft/h—a 30 ft/h improvement compared with traditional bit-and-RSS-technology. This system also eliminated the need to change the BHA after the curved sections by drilling the curve and lateral sections in a single run. Both of these improvements combined saved Repsol an average of 28.6 h per well.

Repsol plans to use the NeoSteer CL ABSS on more wells in this area in the future.