Rotary Steerable System Improves Reservoir Drilling Efficiency and Wellbore Placement in the Statfjord Field

Andreassen, Espen; Blikra, Harald; Hjelle, Arne; Kvamme, S.A.; Haugen, Jonny

doi:10.2118/39329-ms

Cited by 10 publications

(2 citation statements)

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“…The advantages of drilling with RCLS are well documented in the literature 3,4,5 . The advantages of drilling with RCLS are well documented in the literature 3,4,5 .…”

Section: Operational Performance Of Rclsmentioning

confidence: 99%

Using Rotary Closed-Loop Drilling to Increase Operational Efficiency and Reduce Operational Risk

JOHNSTONE¹,

GRUENHAGEN²

2001

Proceedings of Offshore Europe

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThis paper reviews the operational experience gained of utilizing Rotary Closed -Loop Steerable (RCLS) drilling technology on development drilling projects in the UKCS for the period 1997 -2000. Despite the general decline in drilling activity in this period, there was a significant increase in RCLS drilling activity. Sufficient operational experience has now been gained to a) fully evaluate the impact of the new technology on the drilling operation and to b) make a comparison of RCLS system performance against a conventional drilling operation.The paper focuses on the following three key performance measures of the RCLS operation:1. Reliability of the Technology: A review is made of the RCLS system performance, where problems occurred at the introduction of the technology and what solutions were implemented to improve system reliability. 2. Operational Performance: An assessment of the factors which influence the operational efficiency of the RCLS operation is presented and a comparison is made with the operational efficiency of a conventional drilling operation. Safety & Environmental Performance: The introductionof RCLS technology facilitates a safer working environment for drilling operations at the rig site. The positive impact that the technology has made to the drilling operation is reviewed here.In reviewing past performance, the direct and indirect advantages of deploying RCLS are discussed in light of experience gained on a number of offshore UK North Sea assets including those projects managed by low cost operators or where field economics are marginal.

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“…The advantages of drilling with RCLS are well documented in the literature 3,4,5 . The advantages of drilling with RCLS are well documented in the literature 3,4,5 .…”

Section: Operational Performance Of Rclsmentioning

confidence: 99%

Using Rotary Closed-Loop Drilling to Increase Operational Efficiency and Reduce Operational Risk

JOHNSTONE¹,

GRUENHAGEN²

2001

Proceedings of Offshore Europe

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“…Extended reach well (ERW), typically defined as a directional or horizontal one with a high HD (horizontal displacement) to TVD (true vertical depth) ratio larger than 2.0, has allowed the industry to reach and capitalize on hydrocarbon reserves inaccessible with conventional drilling and completion methods [1][2][3] . Rapid advancement in drilling techniques makes ERW an enabler onshore to cost-effectively develop the hydrocarbon reservoirs along the coast of Bohai Bay, China.…”

Section: Introductionmentioning

confidence: 99%

Achievements and Lessons Learned from a 4-Year Experience of Extended Reach Drilling in offshore Dagang Oilfield, Bohai Basin, China

Cheng

Wang

Zou

et al. 2011

SPE/IADC Drilling Conference and Exhibition

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The long-term continuous exploitation makes it increasingly difficult to maintain sustainable hydrocarbon production onshore in Dagang Oilfield. The shelf sea area of Bohai Basin with an average water depth of about 2.5m is identified as the main take-over battlefield, which needs to be developed by extended reach drilling (ERD) due to the lower loading capability of subsea thick silt and the inaccessibility of drilling rigs onshore or offshore. This is one of the major ERD campaigns implemented independently onshore in China.Favorable achievements have been obtained during the 4-year ERD play. Four extended-reach horizontal wells with the horizontal displacements larger than 4000m have been successfully completed by integrated application of pseudo-catenary trajectory design, casing floating running technology, compound drilling method, real-time ECD monitoring, highly inhibitive drilling fluid, optimized hole cleaning operation and enhanced drag/torque reduction technology. The maximum horizontal displacement to vertical depth ratio reaches 3.92. Many other ERD records have also been made in China onshore, building basic foundations for much larger-scale of application of ERD in Bohai Basin. Meanwhile, many new challenges have also emerged, such as the wellbore instability in highly deviated intervals, inappropriate design and optimization of PDC bit, instable bottom hole assembly (BHA), difficult control on well trajectory for the long angle-holding section, etc. This calls for technical innovations to address problems associated with previous ERD activities.This paper focuses on the technical achievements as well as the lessons learned from the ERD play in recent years, with its purpose to explain where we are and what to do next for further research and development of ERD technology in China. Helpful case histories and recommendations will also be presented.

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Rib-Steered Motor Technology: The Revolutionary Approach Extends the Coiled Tubing Drilling Application Scope

et al. 2012

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Traditional coiled tubing drilling (CTD) operations employ bent mud motors to create bit rotation that enable diverging wellpaths. As coil rotation is not applicable, an additional downhole orientation device is required for directional control of the motor. For more than a decade, this setup has enabled reliable and successful CTD operations worldwide. It also has been, over time, driven to its limits. Several apparent drawbacks with this platform include unfavorable drag that limits the maximum horizontal reach, suboptimal wellbore quality causing challenges in subsequent liner running operations or the increased distance of inclination measurements from the drilling bit. While some of those can be managed to a certain extent, others are intrinsic to the bent-motor steering concept. The need to further improving well construction economics requires that the CTD operational envelope be extended with new concepts and technologies. This paper covers the introduction and utilization of a new directional steering technology that is based on the concept of closed-loop steerable drilling systems from rotary drilling applications. The new 3-in. rib-steered motor (RSM) design includes three hydraulically expandable ribs that are controlled from surface during drilling. In such setup required wellbore contact forces are generated that are necessary for drilling complex 3D well profiles. The RSM platform also offers the capability to drill tangents, which is impossible with the combination of bent motors and downhole orientation devices. Testing of this new platform commenced in 2008 in Alaska for BP, and it was further improved to become a new standard technology for horizontal or tangent sections in high-end CTD applications. Since then, 3-in. RSM bottomhole assemblies have drilled more than 23,000 feet in more than 13 wells in Alaska. Compared to bent motor drilling, RSM technology improves weight transfer and enables precise control of weight on bit to total depth (TD) for significant extension in lateral section length. It also improves hole quality to make liner running operations more reliable, and reduces non-drilling time by reducing the amount of required wiper trips for hole cleaning purposes. This paper discusses these aspects in more detail and uses available field data to show and support the technology’s benefits and its impacts on project economics.

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Rotary Steerable System Improves Reservoir Drilling Efficiency and Wellbore Placement in the Statfjord Field

Cited by 10 publications

References 0 publications

Using Rotary Closed-Loop Drilling to Increase Operational Efficiency and Reduce Operational Risk

Using Rotary Closed-Loop Drilling to Increase Operational Efficiency and Reduce Operational Risk

Achievements and Lessons Learned from a 4-Year Experience of Extended Reach Drilling in offshore Dagang Oilfield, Bohai Basin, China

Rib-Steered Motor Technology: The Revolutionary Approach Extends the Coiled Tubing Drilling Application Scope

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