Application of New Generation Rotary Steerable System for Reservoir Drilling in Remote Areas

Gruenhagen, Hartmut; Hahne, Ulrich; Graham, Alvord

doi:10.2523/74457-ms

Cited by 2 publications

(1 citation statement)

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“…Grindrod et al 19 suggest that new positive displacement motors and application specific PDC bits improve wellbore trajectories in addition to the gains made using at bit inclination guidance methodology. Gruenhagen et al 20 make similar claims for drilling with Rotary Closed Loop Systems (RCLS).…”

Section: General Conceptsmentioning

confidence: 89%

Influence of Horizontal Section Sinuosity and Lateral Accuracy on Heavy Oil Cold Production from Close-Spaced Senlac/Winter Saskatchewan Wells

Miller

Cameron

Lu³

et al. 2004

All Days

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractHorizontal well drilling for heavy oil cold production in Western Canada was initiated in 1988, and has matured to the extent that over 550 horizontal wells have been drilled into the Cummings/Dina channel trend between Senlac and Winter, Saskatchewan. A significant fraction of the more recent wells have been drilled as infills to enhance reservoir drainage. Reviews of the performance of these wells suggest drilling accuracy in all three dimensions within the horizontal section strongly affects the performance of original wells and the ability to optimize placement of infill horizontal wells between the original wells.Horizontal trajectory control has improved significantly in the last 10 years, the latest improvement being 'inclination at the bit.' Selected wells were analyzed to determine the key factors between horizontal section sinuosity and both production rate and ultimate recovery, and the changes in the effect of these key factors over the last 10 years. Incentive and methodology for development of current flatter wells is discussed, and predictions of improved production are given.Initial spacing in many areas was nominally 75 meters, and several areas are being infill drilled to 37.5 meter spacing to increase reservoir drainage. The heels of the infill wells are placed between the toes of the original wells to avoid expected greater oil depletion and water coning at the heels of the original wells.Several recent infill wells encountered lost circulation and/or magnetic interference from offsetting original wells, indicating the locations of the original wells obtained from MWD data were not accurate. For subsequent infill wells gyros were run in the original wells, and the gyro-based original well locations disagreed with the MWD-based locations. This prompted an examination of existing drilling, MWD, gyro, and magnetic North positioning data and technology.This paper discusses the theoretical and practical aspects of drilling flatter horizontal wells, establishing the locations of existing horizontal wells, and optimum placement of infill horizontal wells between the existing wells in the Senlac/Winter, Saskatchewan pools.

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Section: General Conceptsmentioning

confidence: 89%

Influence of Horizontal Section Sinuosity and Lateral Accuracy on Heavy Oil Cold Production from Close-Spaced Senlac/Winter Saskatchewan Wells

Miller

Cameron

Lu³

et al. 2004

All Days

View full text Add to dashboard Cite

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Experience With Rotary Steerable System for Reservoir Drilling in Iranian Offshore Oilfields

Molayee

Teimoori

2006

SPE Asia Pacific Oil &Amp; Gas Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractThe majority of the wells which have been drilled in Iranian oilfields in Persian golf include a horizontal section through the reservoir and the most of them have been drilled by the conventional steerable mud notor assemblies. Steerable motor drilling is a relatively inefficient process with associated problems, ranging from trajectory control in unstable shales, pipe sticking in lost circulation zones and slide drilling in carbonate reservoirs. In order to minimize the effect of these issues, rotary steerable system has been deployed in a number of wells for reservoir lateral drilling over the past year. This paper looks at a range of specific applications where the change from steerable motor to rotary steerable system has been both technically and commercially successful in offshore Iranian oilfields. Through the case histories, this paper will demonstrate both tangible and intangible benefits resulting from the use of rotary steerable systems that have led to a step change in overall drilling performance.

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Application of New Generation Rotary Steerable System for Reservoir Drilling in Remote Areas

Cited by 2 publications

References 0 publications

Influence of Horizontal Section Sinuosity and Lateral Accuracy on Heavy Oil Cold Production from Close-Spaced Senlac/Winter Saskatchewan Wells

Influence of Horizontal Section Sinuosity and Lateral Accuracy on Heavy Oil Cold Production from Close-Spaced Senlac/Winter Saskatchewan Wells

Experience With Rotary Steerable System for Reservoir Drilling in Iranian Offshore Oilfields

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