Planning, Execution and Lessons Learned From the GWA13 Extended Reach Drilling 
Well - Goodwyn Gas/Condensate Field, NWS, Australia

Dolan, S.P.; Crabtree, R.C.; Drury, R.F.; Gogan, R.; Hattersley, G.; Hindle, D.; Neufeld, B.; Scaife, R.

doi:10.2523/50079-ms

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Extended Reach Drilling (ERD) is a technique to drill directional/horizontal wells beyond the routine capabilities of drilling rigs and tools. ERD was initiated in 1980's and rapidly evolved during the 1990's [1][2][3][4]. Naegel et al [5] reported an ERD well with a 20,341.2 ft horizontal departure at 5,577 ft true vertical depth (TVD).…”

Section: Introductionmentioning

confidence: 99%

An Analytical Model for Axial Force Transfer and the Maximum Compression Point of Work Strings in Extend Reach Drilling

Shaibu

2020

IMST

View full text Add to dashboard Cite

Complex work string dynamics are often observed when one is investigating the limit of Extended Reach Drilling (ERD), yet the underlying physical causes of anomalous problems are often not fully understood and is thus a topic of ongoing research interest. Theoretical models capturing tubular dynamics have been previously proposed to analyze force transfer in work strings, yet there is significant confusion regarding these models because their published versions are not entirely consistent and, in many cases, do not meet engineering requirement. Further confusion is introduced through variations in pin-pointing locations where axial compression in the work strings should be checked for mechanical integrity. A simple and yet rigorous mathematical model is essential for adequate prediction of axial compression profiles in work strings for ERD. This article presents a simplified tubular mechanics model for describing axial force transfer under ERD conditions. We discuss the model in finding the point of peak compression in casing strings. This point is predicted to be in the arc section near the heel of a horizontal wellbore, under borehole drilling, and casing running conditions. The exact location of the peak axial compression changes with pipe-wall friction coefficient. For the friction coefficient in the range of 0.15 to 0.35, this point occurs in the range of inclination angle between 70.7 o and 81.5 o , averaging 76.1 o . The model can also be used for other purposes, including prediction of depth limit, bottom hole assembly (BHA) design, and locking up analysis of coiled tubing (CT) strings.

show abstract

Section: Introductionmentioning

confidence: 99%

An Analytical Model for Axial Force Transfer and the Maximum Compression Point of Work Strings in Extend Reach Drilling

Shaibu

2020

IMST

View full text Add to dashboard Cite

show abstract

A Pragmatic Approach to Managing Wellbore Instability in Extended Reach Wells in the Goodwyn Field

Tan

Willoughby

1999

SPE Annual Technical Conference and Exhibition

View full text Add to dashboard Cite

TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractDrilling experience with numerous inclined wells highlighted the issue of wellbore stability in the Goodwyn Field, North West Shelf of Australia. Subsequently, a study, with an emphasis on the longest horizontal well drilled in Australia at that time, GWA 12, was conducted. The aim of the study was to develop strategies to control shale instability during the drilling of future wells in the field. Following the drilling of a number of extended reach wells, a post-drilling review of the wells, including GWA 12, was conducted and the additional information used to revise the critical mud weight contour plots for future application. An assessment was also made of the drilling fluid design for long term stability of GWA 13ST2 based on pore pressure changes induced by key drilling fluid-shale interaction mechanisms.This paper describes the required information, methods used to carry out the wellbore stability analyses and utilisation of the results from the two studies to develop the recommendations for the mud weight programs of the field. The approach adopted in the studies utilises the relevant field observations in vertical and inclined wells to develop strategies to control instability through theoretical wellbore stability analyses. Reference mud weights, based on drilling experience and wellbore condition in the wells, were used to calibrate the predicted critical mud weights. In addition, design charts of pore pressure change due to mud pressure penetration and chemical potential mechanisms were used to assess the drilling fluid chemistry for long term wellbore stability.

show abstract

Planning, Execution and Lessons Learned From the GWA13 Extended Reach Drilling Well - Goodwyn Gas/Condensate Field, NWS, Australia

Cited by 2 publications

References 0 publications

An Analytical Model for Axial Force Transfer and the Maximum Compression Point of Work Strings in Extend Reach Drilling

An Analytical Model for Axial Force Transfer and the Maximum Compression Point of Work Strings in Extend Reach Drilling

A Pragmatic Approach to Managing Wellbore Instability in Extended Reach Wells in the Goodwyn Field

Contact Info

Product

Resources

About