High Angle Directional Drilling With 9 5/8-in. Casing in Offshore Qatar

Avery, M J; Al-Hadad, Ali K.; Stephens, Jeffrey Tod; Turki, Mounir; Abed, Malek

doi:10.2118/119446-ms

Cited by 2 publications

References 4 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

Casing During Drilling With Rotary-Steerable Technology in the Stag Field—Offshore Australia

Graves

Herrera

2013

SPE Drilling &Amp; Completion

View full text Add to dashboard Cite

Summary Originally discovered in 1993, the Stag oil field, located on the Northwest shelf of Western Australia, has produced more than 58 million bbl since production began in 1998 (Goodacre et al. 2000). The field is shallow (680 m subsea), encompassing highly unconsolidated and highly permeable sandstone. Reservoir depletion, unconsolidated rock, water breakthrough, and sand production have created conditions under which infill-drilling campaigns have become increasingly problematic in the Stag field in recent years. There have been numerous papers documenting the history of the Stag field (McDiarmid et al. 2001; Muecke et al. 2002; Wibawa et al. 2008). On three recent infill wells, the intermediate 12¼-in. intervals were drilled and cased with casing-while-drilling (CWD) technology with a rotary-steerable system (RSS). This was used to navigate wellbore congestion, to drill designer well paths to avoid "incoherencies" [a seismic attribute that is mappable and correlates with drilling problems (Chima et al. 2012)], to land the horizontal section, and then to drill horizontal tangent sections out to the initial reservoir penetration (liner point). The CWD applications progressed from a "new technology" trial to a stretch reach and performance goal, to finally successfully being used as a key enabling technology to drill a well that might otherwise be undrillable because of instability issues. The directional CWD 12¼-in.-hole intervals were drilled from just below the 13-⅜in. surface casing to the 9⅝-in.-casing point, building from 25° inclination to horizontal and holding thereafter. This program (the first applications of this type in Australia) resulted in two consecutive world-record runs. The result is that CWD is a viable enabling technology that will be used to drill future Stag infill wells and should be considered as a viable alternative on other drilling projects. This paper will discuss the identification of the technology application, planning, implementation, results, and lessons learned. This paper will end with a notional conversation regarding CWD becoming a mainstream method.

show abstract

Casing During Drilling With Rotary-Steerable Technology in the Stag Field—Offshore Australia

Graves

Herrera

2013

SPE Drilling &Amp; Completion

View full text Add to dashboard Cite

show abstract

Integrated and Longest Directional Casing While Drilling Mitigates Hole Problems and Improves Drilling Performance While Saving Drilling Time

Radhakrishnan

Gonzalo²,

Borge³

et al. 2017

Day 3 Thu, March 16, 2017

View full text Add to dashboard Cite

Directional Casing While Drilling (DCwD) with Steerable Motor or a Rotary Steerable System is an emerging technology with proven results in Casing While Drilling applications. DCWD has been successfully applied in wells in Asia, North Sea and Middle East using rotary steerable systems & PDMs, proving up its operational reliability. The technology has been implemented in Asia Pacific region as well overcoming several challenges. The project was successfully implemented in 2 back to back wells in Gulf of Thailand & being the first of its kind. Since the DCWD is first of its kind in Gulf of Thailand and to the operator, a proper planning and detailing the procedures along with risk assessment is the key to the success of the project. The procedure, in addition to directional capabilities requires that the well meet the demands of anti-collision concerns within the torque and hydraulic operating parameters of the formation. The quest ot overcome the problems faced by the customer led the operator to choose the DCWD technology to deliver step changes in drilling performance while meeting company's strict operational and safety directives. The Integration of the directional drilling segment along with DCWD team along with the operator and the drilling contractor resulted in achieving the following➢Longest 9 5/8 DCwD run world wide➢Highest angle achieved with DCwD run in the field➢Saved 2 days of drilling time compared conventional drilling➢Increase in on bottom ROP compared to offset wells.

show abstract

High Angle Directional Drilling With 9 5/8-in. Casing in Offshore Qatar

Cited by 2 publications

References 4 publications

Casing During Drilling With Rotary-Steerable Technology in the Stag Field—Offshore Australia

Casing During Drilling With Rotary-Steerable Technology in the Stag Field—Offshore Australia

Integrated and Longest Directional Casing While Drilling Mitigates Hole Problems and Improves Drilling Performance While Saving Drilling Time

Contact Info

Product

Resources

About