Cimarex Energy Co. wanted to reduce drilling time while kicking off a pilot hole and drilling a curve and lateral in West Texas. Historically, Cimarex has used three separate assemblies in three runs to kick off from the plug, complete the curve and drill to TD. The operator required a specially designed BHA to meet the demands of drilling in an area of the Permian basin known to induce shock and vibration.
The PowerDrive Archer high build rate rotary steerable system was selected to perform the sidetrack and drill the well to TD faster and eliminate time associated with multiple trips and slide drilling. This system is a true hybrid of push- and point-the-bit technology that delivers high-dogleg severities up to 18°/100 ft. It also enables the system to perform fast, reliable openhole sidetracks in any direction.
SLB supplied directional drilling services to optimized the SHARC high-abrasion-resistance PDC drill bit using IDEAS integrated design platform. Using 4D, time-based simulations, the IDEAS platform models the cutting interface in real time, eliminating costly trial-and-error field tests. To reduce shock and vibration, SLB determined optimum fluid characteristics using VIRTUAL HYDRAULICS software.
Using an engineered BHA design including PowerDrive Archer high build rate rotary steerable system and SHARC PDC drill bit, Cimarex drilled the well with one BHA, resulting in a time savings of six days. The separation off of the cement plug was gained at 80 ft/h, eliminating time-drilling intervals while rotating. The curve and lateral sections were completed in one run and Cimarex set two company records for drilling speed—the curve at 1,544 ft/d and the lateral at1,956 ft/d.
While drilling, the operation encountered higher-than-expected shock and vibration. Predictive modeling from i-DRILL engineered drilling system design eliminated the drillstring as the cause. VIRTUAL HYDRAULICS software was then used and determined the fluid had caused the heavy shock and vibration. SLB experts worked closely to evaluate and model the appropriate fluid. Once the shock and vibration were reduced, the PowerDrive Archer high build rate rotary steerable system performed to specifications. Cimarex plans to use this time-saving system when drilling future wells in the Permian basin.
