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Case Study: SEECO Drills First High Build Rate RSS Wells in Fayetteville Unconventional Gas Reservoir

PowerDrive Archer service delivers highest build rates from an RSS in 8 3⁄4-in hole

Challenge: Overcome poor hole cleaning and stuck pipe incidents that occur while sliding with positive displacement motor; increase build rates in upper Fayetteville.

Solution: Use PowerDrive Archer high build rate, fully rotating RSS to kick off from vertical, build curve, and land the well in the reservoir while drilling a smooth, clean wellbore.

Result: Kicked off from vertical; delivered build rates greater than 14°/100 ft; successfully landed in reservoir with late change to TVD because of geological uncertainty; drilled 1,000 ft of lateral section.

Delivering high build rate well profiles with a RSS

Southwestern Energy Corporation (SEECO) drills and completes more than 600 horizontal wells per year in the Fayetteville shale gas play. While drilling for unconventional gas, SEECO has made significant production rate increases by extending horizontal lateral lengths. To achieve these results, well profiles often have build rate curves of 10°/100 ft or more. Previously, these wells were beyond the reach of conventional RSS tools and were drilled with positive displacement motors. This resulted in some challenging drilling problems, such as low ROP, poor hole cleaning, and stuck pipe incidents.

PowerDrive Archer high build rate RSS offered a solution delivering this aggressive well profile. And in delivering curves previously only possible with motors, the tool also provided the benefits of a fully rotating RSS with high ROP and wellbore quality.

The first well profile involved a kick off from vertical into a continuous 10°/100 ft build section to land horizontally in the Fayetteville shale. The vertical kickoff was achieved without issue and the curve drilled successfully—with PowerDrive Archer RSS delivering greater than 10°/100 ft in the troublesome upper Fayetteville, where motors had previously struggled. The well was landed within 0.5 ft of the target and casing was run smoothly.

More than 14°/100 ft build rate and successful lateral section

SEECO chose to use PowerDrive Archer RSS once again for the second well as it required a vertical kickoff, build rates greater than 14°/100 ft, and a lateral section through the reservoir. In the second well, a maximum build rate of greater than 14°/100 ft was achieved and a 1,000-ft near-horizontal lateral section completed.

This tool increased reservoir exposure to enable SEECO to achieve its goals of increasing production rates by maximizing horizontal lateral sections. This was achieved by hitting the reservoir sooner and drilling farther in the horizontal section.


Download: SEECO Drills First High Build Rate RSS Wells in Fayetteville Unconventional Gas Reservoir (0.48 MB PDF)

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