Technical Session 15 – Drilling and Well Technologies

Editor’s note: These abstracts have been edited for space and clarity. This program is current as of 15 January 2013. Additions, withdrawals and other changes to the conference program after this date may not be reflected. Click here for the most updated program.

TECHNICAL SESSION 15: DRILLING AND WELL TECHNOLOGIES

A Summary Of Wired Drill Pipe (IntelliPipe) Field Trials And Deployment in BP, S.T. Edwards, C.J. Coley, BP

The first use of IntelliPipe in BP was in early pre-commercial field trials in seven Oklahoma wells in 2004 to 2005. This paper includes a discussion of the challenges and solutions in areas, such as hardware modifications (e.g. wiring top drives, reamers, jars), deployment, logistics, reliability, pipe handling and other operational modifications, surface connectivity and dataflow to shore. The bulk of this paper discusses wired pipe enabled applications and explores some of the opportunities for using wired pipe in the pursuit of safe and reliable wells.

Annular Pressure Build-up Analysis and Methodology with Examples from Multifrac Horizontal Wells and HPHT Reservoirs, J.E. Bellarby, Canmore Consulting; S.S. Kofoed, Maersk Olie og Gas AS – Maersk Oil; F. Marketz, Shell

Annulus pressure build-up (APB) remains an important design consideration for many wells, not just deepwater or subsea wells. This paper outlines a step-by-step methodology for analyzing APB issues applicable to any type of well. Analyses of APB scenarios for horizontal wells in both a tight chalk oil reservoir and an HPHT gas-condensate reservoir in the Danish Sector of the North Sea are used to demonstrate the methodology.

Analysis of Bridging Scenarios During Blowout Events, S.M. Willson, Apache Corp

In this paper the analysis methodology presented in SPE 156330 “A Wellbore Stability Approach For Self-Killing Blowout Assessment” is applied to realistic blowout scenarios. The paper demonstrates how analyses of borehole stability and solids transport can be applied to the problem of blowout risk assessment. This is a technology area that has been previously neglected by petroleum geomechanics practitioners.

Comparing Soft-String and Stiff-String Methods Used to Compute Casing Centralization, L. Gorokhova, A.J. Parry, N.C. Flamant, Schlumberger

A comparison between measured and calculated casing centralization in several field cases is presented. The casing eccentricity was measured after the cement placement using recently developed ultra-sonic logging tools and diagnostics. Discrepancies between analytical and numerical calculation methods are analyzed, then advantages and disadvantages to each method are discussed. Based on the results of the calculation methods, an optimal approach to centralize casing can be proposed.

Multiwell Thermal Interaction: Field Data Validation of Transient Model for Closely Spaced Wells, A.R. McSpadden, Altus Well Experts; A.J. Gunn, C. Dunagan, ConocoPhillips UK

Wellbore temperature logs and associated field history from an HPHT condensate North Sea platform are presented, which validate accuracy of a transient multiwell thermal interaction model.

Empirical data including field history presents an opportunity to understand this important topic. Prior to this current work, industry discussion of multiwell thermal interaction or cross-heating has been largely anecdotal. Model validation against field data is necessary to achieve full understanding of the physical system and provide confidence in predictive capability.

Obtaining Both Horizontal Stresses from Wellbore Collapse, B.S. Aadnoy, E. Kaarstad, University of Stavanger

A wellbore that collapses during drilling or during production usually assumes an elliptical shape because of anisotropic stress loading. Recently an exact solution for tangential stress of an elliptic wellbore was derived. This model couples the ovality of the wellbore to the stress anisotropy. The rock strength plays an important role, such that a strong consolidated rock will have less ovality than a less consolidated rock.

This new solution has many practical applications, first of all to develop fracture and collapse curves for deviated wells, but also for sand production, well stimulation and reservoir subsidence. The paper will present several field cases, both from Brazil and Norway, demonstrating improvements in practical wellbore stability analysis.

E-POSTERS:

Living the HSE Vision & Values – Delivering Success in an Environment of Significant Change; Inside and Outside the Organization, G.P. Siokos, George Siokos Consulting; J.M. Karish, Ensco

Ensco is an international drilling contractor which has experienced significant growth since its creation only 25 years ago to its current position as the second largest offshore drilling organization worldwide.

Despite this growth, and while being challenged by many issues from inside, such as integration, and from the outside, such as having to do business in a difficult market and in many different national cultures, it has achieved acknowledged excellent performance.

This paper and presentation will describe the processes and the leadership that has driven this success.

Pore Pressure Evolution, Core Damage and Tripping Out Schedules: A Computational Fluid Dynamics Approach, I. Zubizarreta, M. Byrne, Y. Sorrentino, E. Rojas, Senergy Ltd

There is a lack of clarity and consensus regarding tripping schedules impacting on both the integrity of the core and the economics of coring/drilling operations.

With this high daily rig costs, a more scientific and quantitative approach, tailored to each case is required. The application of computational fluid dynamics (CFD) is described to model transient pressure differentials in a gas reservoir core during retrieval.

This study demonstrates that CFD can accurately predict the pressure differentials created in a core during retrieval to surface and enables proper planning of tripping times based on the assessment of potential damage by pressure release.