自动曲线技术以2°/30米的深度钻进了1500米

位置

巴西，南美，离岸

Summary

Using the rotary steerable system (RSS) auto-curve capability, an offshore Brazil operator reduced downlink commands by 33% and improved net rate of penetration (ROP) by 38%. Increased drilling efficiency enabled a reduction in total drilling time by 17 hours compared with the perfect well time in this field.

Objective

An operator in Brazil wanted to drill a 12¼-in section from an offshore fixed platform. 的 well plan specified a 3D trajectory of 2°/30-m dogleg severity (DLS) for almost 1,500 m. Previous wells from this platform were drilled by directional drillers in manual mode, sending downlinks from the surface to change the steering ratio and toolface on demand to follow the proposed well trajectory. This field test assessed the autonomous downhole control system’s ability to navigate the curve.

Results

的 PowerDrive Xcel™ RSS was recommended for a single run bottomhole assembly (BHA) because the auto-curve mode adjusts the steering ratio automatically based on required DLS and toolface.

Auto-curve mode was engaged once the BHA was out of the casing shoe at 10° inclination. 的 directional drillers varied the DLS and toolface as necessary, which were the only two inputs needed to drill to total depth (TD). Using auto-curve mode reduced the number of downlink commands by 33% from drilling in manual mode.

的 autonomous downhole control system accounted for the influences of drilling parameters and formation characteristics on the trajectory response. 的 PowerDrive Xcel RSS reacted quickly to the changes compared with manual drilling. 因此, the drilled well path was closer to the planned wellbore path, and the risks associated with directional drilling uncertainties were minimized. Both the operator and the directional drillers provided positive feedback on auto-curve’s performance.

Using the autonomous downhole control system enabled the operator to improve net ROP by 38%, 比完美井的净ROP高出10%. 另外, total drilling time was reduced by 25 hours compared with the budgeted well time and 17 hours compared with the perfect well time for this field.

关键性能指标在12¼-in节	完美的钻井时间	预算钻井时间	PowerDrive excel RSS时间
总钻进时间，h	61	69.15	44.5
净ROP, m/h	45	na	49.6

PowerDrive Xcel RSS with auto-curve improved drilling efficiency for the operator by increasing ROP, 减少下行命令, 减少总钻井时间.

Well log of continuous and desired inclination, toolface, continuous azimuth, and steering ratio.

作业者钻了将近1层,500 m at 2°/30-m DLS with the autonomous downhole control system to adjust steering ratios and improve drilling efficiency.

Graph of the overlaid plan and drilled path and the engagement of auto-curve mode before the curve.

的 PowerDrive Xcel RSS auto-curve mode adjusted the steering ratio automatically based on the required DLS and toolface. 的 drilled well path (blue) was nearly identical to the planned trajectory (grey), and the risks associated with directional drilling uncertainties were minimized.

的 graph maps the 3D turn accomplished by the PowerDrive Xcel RSS auto-curve mode.

Auto-curve mode on the PowerDrive Xcel RSS successfully drilled the 3D trajectory of the well, 这是鸟瞰图. 的 system automatically adjusted the steering ratio based on the required DLS and toolface.

产品使用

PowerDrive Xcel

旋转操舵系统

Maintain tight directional control through the magnetic zone of exclusion and monitor stick/slip, 冲击, 和振动.