Application of a Point the Bit Rotary Steerable System in Directional Drilling Prototype Well Bore Profiles for Aera Energy, LLC

SCHAAF, STUART, Schlumberger Oilfield Services

Recent trends in the oil industry are requiring higher degrees of accuracy in the placement of boreholes, while improving overall rates of penetration. In addition to reducing overall drilling costs, several technical reasons can be sighted. These include: Increasingly complex directional well trajectories designed to drain more of the reservoir. Accurate build rates and precise landing of horizontal wells. Accurate horizontal control for steering relative to an interface or to reduce undulation in extended reach wells. Rotary steerable systems have been introduced in recent years to respond to these more complex requirements. These systems have shown the potential of reducing the costs of drilling while providing improved control. Elimination of sliding increases rates of penetration; provides better hole cleaning, smoother boreholes, less chance of differential sticking; and the ability to drill further.Schlumberger has developed a new rotary steerable system, which functions on a point the bit principle. The system has no non-rotating or stationary parts in contact with the formation. The ystem is implemented in a 6 +-inch platform and operates in borehole diameters between 8 3/8-inch and 9 7/8-inch. This paper will present an overview of the new point the bit system. Benefits of the system will be discussed. Case studies from Aera Energy, LLC will be presented. The presentation will discuss the well objectives, the plan implementation, and include operation highlights and issues. Project results and improvements in implementation will be presented with discussion on how the system was utilized to insure value-added savings.

AAPG Search and Discovery Article #90911©2000 AAPG Pacific Section and Western Region Society of Petroleum Engineers, Long Beach, California