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Real Results

Performance By The Numbers

Magnus® Rotary Steerable System

Delivers 6-In. Section in 1 Run, Saves 9 Days of Drilling Time

Objectives

  • Obtain accurate logging-while-drilling (LWD) data as required in real time and memory in an offshore, horizontal well.
  • Drill with improved performance compared to offset wells in the field by increasing the on-bottom rate of penetration (ROP), reducing stick-slip and vibration levels, and achieving zero nonproductive time (NPT).
  • Maintain a trajectory with a maximum dogleg severity of 5.5°/30 m (100 ft) to minimize borehole tortuosity for post-drilling operations.

Our Approach

  • The Weatherford team recommended a drilling solution, including LWD technologies and the 4.75-in. Magnus rotary steerable system (RSS).
  • During the planning stage, the team engaged with the customer to develop a Front-End Engineering Design report based on an offset well analysis and Weatherford experience in this field. This approach covered these critical points:
    • Best practices to maximize RSS performance while minimizing certain drilling hazards identified during the risk assessment stage.
    • Tailored bottomhole assembly (BHA) design focused on torque and drag, hydraulics, and vibration optimization.
    • Stuck-pipe mechanism assessment and mitigation controls to reduce the BHA stabilization points while managing job safety hazards.
    • Hole-cleaning procedure made for this well and agreed on with the customer.
    • Customized driller’s roadmap with critical operations and field-crew guidance covering all the trajectory sections and formation specifics.
    • Implementation of operational guidelines with risk controls to perform the whipstock exit and drill directly after with the RSS BHA.
  • Upon deployment, the Magnus RSS worked with LWD technologies to inform drilling. Its near-bit inclination coupled with LWD resistivity and sonic imaging to help minimize reservoir uncertainties, maintain pay-zone contact, and ultimately land the well. The HAGR sensor helped to identify formation tops in real time. LWD pressure measurements provided live information on downhole hydraulics and fluid performance.
  • The Magnus RSS kicked off from the whipstock. It drilled 9,249 ft over 394 operating hours with a 26% increase in average ROP and a 50% reduction in stick-slip and vibration levels compared to offset wells.
  • The RSS worked against a formation dip angle of 5 to 10° to intercept all planned geological targets within a target window having a 10-m radius and running 6.6 ft (2 m) above and 13.1 ft (4 m) below the reservoir top.

Value to Customer

  • The Weatherford solution, including the Magnus RSS and LWD technologies, acquired accurate data to mitigate drilling problems and optimize the process.
  • The Magnus RSS helped to deliver the well 9 days faster than previous offset wells for a savings of more than US $2.5 million by increasing the average ROP, reducing stick-slip and vibration during drilling, and avoiding NPT caused by Weatherford equipment.
  • The solution provided excellent whipstock-exit and trajectory control with the longest step-out compared to previously drilled offset wells. This execution eliminated the need for an extra run using a positive displacement motor to initiate a sidetrack.

Learn More

Drilling Services
 
Magnus RSS
 
Print Version
Details

Location

Black Sea, Romania

Well Type

Offshore, horizontal, oil

Formation

Sandy marls, agrillaceous limestones, calcareous claystone, sandstone

Hole Size and Angle

6 in., 90°

Casing Size and Type

9 5/8- and 7-in. N80

Liner Size and Type

4 1/2-in. P110

Temperature

230°F (110°C)

Pressure

3,989 psi (275 bar)

Depth

5,358 to 14,606 ft (1,633 to 4,452 m)

Products/Services

Magnus® Rotary Steerable System Delivers 6-In. Section in 1 Run, Saves 9 Days of Drilling Time

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