Schlumberger Introduces Industry-First Continuous Resistivity Look-Ahead-While-Drilling Service | SLB

Schlumberger Introduces Industry-First Continuous Resistivity Look-Ahead-While-Drilling Service

Published: 05/06/2019

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HOUSTON, May 6, 2019—Schlumberger today introduced the IriSphere* look-ahead-while-drilling service at the Offshore Technology Conference. The new service provides the industry’s first application of electromagnetic (EM) technology for detecting formation features ahead of the drill bit in oil and gas wells.

The service uses EM-based resistivity measurements more than 100 ft [30 m] ahead of the drill bit, which are then compared to a prepared model that incorporates offset and other data to reveal a true downrange representation of the formation while drilling. This enables operators to make proactive decisions rather than reacting to measurements at or behind the bit while drilling wells.

“IriSphere service was created in response to the needs of our customers for risk reduction, improved drilling efficiency and optimal casing point selection,” said Tarek Rizk, president, Drilling & Measurements, Schlumberger. “Knowing what conditions lie ahead of the bit while drilling enables operators to reduce uncertainties and minimize costs by identifying geological features and deciding which actions to take before encountering them.”

More than 25 field trials were conducted with the IriSphere service in Asia, Australia, Latin America and Europe. These trials included successfully detecting reservoirs and salt boundaries, identifying thin layers, and avoiding drilling hazards, such as high-pressure formations that can lead to wellbore stability issues.

Offshore Western Australia, one customer used the IriSphere service in an unexplored part of a field to detect the reservoir 62 ft [19 m] ahead of the bit while drilling and determine reservoir thickness to be 82 ft [25 m]. This avoided the need to drill a pilot hole, and subsequent coring operations were optimized based on data acquired while looking ahead of the drill bit.

For more information on the IriSphere look-ahead-while-drilling service, visit

About Schlumberger

Schlumberger is the world's leading provider of technology for reservoir characterization, drilling, production, and processing to the oil and gas industry. With product sales and services in more than 120 countries and employing approximately 100,000 people who represent over 140 nationalities, Schlumberger supplies the industry's most comprehensive range of products and services, from exploration through production, and integrated pore-to-pipeline solutions that optimize hydrocarbon recovery to deliver reservoir performance.

Schlumberger Limited has executive offices in Paris, Houston, London, and The Hague, and reported revenues of $32.82 billion in 2018. For more information, visit 


*Mark of Schlumberger

For further information, contact:

Moira Duff
Corporate Communication Manager−Western Hemisphere
Tel: +1 281 285 4376

The IriSphere service multifrequency transmitters and multireceiver BHA provide continuous resistivity that detects formation features far ahead of the drill bit.
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