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Organophilic-Clay-Free Invert-Emulsion Fluid Helps Drill Record-Length Well in the UAE

This paper discusses the successful design, laboratory testing, and performance of an innovative, low-solids, organophilic-clay-free invert-emulsion fluid (OCF-IEF) used to drill the reservoir section of an extended-reach-drilling (ERD) well. This specially designed drill-in fluid helped maintain the key ERD factors within the specifications necessary and set new limits for drilling performance, thus maximizing the horizontal-section displacement and reservoir drainage and production output.

Introduction

ERD is an operative practice for drilling high-angle wellbores with long horizontal displacement. Typically, a well design is classified as ERD when the horizontal displacement is at least two times the vertical-displacement true vertical depth (TVD). The longest well drilled in the UAE had a measured depth of 35,800 ft, with 18,800 ft of horizontal displacement and a 7,894-ft TVD (Fig. 1). This technique is considered one of the more technically challenging in the industry. However, because of increased reservoir contact, it is generally preferred to conventional well designs.

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 186917, “Breaking Records Using an Innovative Organophilic-Clay-Free Invert-Emulsion Fluid To Drill the Longest Well to Date in the United Arab Emirates,” by Mena Nasrallah and Matteo Vinci, SPE, Halliburton, prepared for the 2017 SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, Bali, Indonesia, 17–19 October. The paper has not been peer reviewed.
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Organophilic-Clay-Free Invert-Emulsion Fluid Helps Drill Record-Length Well in the UAE

01 May 2018

Volume: 70 | Issue: 5

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