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Wired-Drillpipe Technology in a Deep Ultradepleted Reservoir

Wells drilled with nitrified drilling fluids require a solution for the transmission of measurement-while-drilling (MWD) surveys, bidirectional communication with rotary-steerable systems (RSSs), and transmission of MWD and and logging-while-drilling (LWD) measurements of downhole temperature and annular pressure for surface choke adjustments. Results from a well recently drilled into an underpressured reservoir in southern Mexico provided an opportunity to demonstrate the applicability of wired drillpipe (WDP) to deliver the required measurements and maintain the proper directional control while keeping the well fluids under control.

Introduction

This paper describes how WDP and managed-pressure drilling (MPD) enabled an operator to drill a severely depleted reservoir with an inverse-emulsion mud mixed with nitrogen delivered through a drillpipe-injection system.

This field has a complex structure divided by a salt intrusion into northern and southern portions. Six reverse faults oriented in different directions are involved in this structure. The reservoirs are found in the Middle and Lower Cretaceous and in the Kimmeridgian-Jurassic. Initial production was from the Lower Cretaceous interval, which is now below saturation pressure. The reservoir pressure has declined dramatically, making it necessary to provide a gasified fluid system to avoid lost-circulation problems while drilling.

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 163501, “Using Wired-Drillpipe Technology During Managed-Pressure-Drilling Operations To Maintain Direction Control, Constant Bottomhole Pressures, and Wellbore Integrity in a Deep, Ultradepleted Reservoir,” by John Rasmus, SPE, Alain Dorel, Tony Azizi, Andre David, Ember Duran, Hector Lopez, Gare Aguiñaga, Juan Carlos Beltran, and Antonio Ospino, Schlumberger, and Eduardo Ochoa, NOV IntelliServ, prepared for the 2013 SPE/IADC Drilling Conference and Exhibition, Amsterdam, 5–7 March.
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Wired-Drillpipe Technology in a Deep Ultradepleted Reservoir

01 June 2014

Volume: 66 | Issue: 6

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