About Troika

Troika is a world-leading provider of seismic data management software, consultancy, and services. Troika develops unique solutions to retrieve and repair legacy formats, merge and check navigation data, and visualise quality control attributes. Our Magma data recovery software has become an industry standard front-end for conditioning big datasets including field, pre- and post-stack seismic for in-house or cloud computing and analytics. Solutions are also provided for remote robotic tape management and verifying datasets for workstation use. The latest developments include new tools to maximise the efficiency and speed of automated trawling and analysis of the legibility, contents and quality of online seismic libraries.

Troika enables competitive advantage by helping to future-proof seismic data repositories and deliver fast access to the right data.

The Team

Troika has a unique team of expert seismic data management professionals located primarily in London, Houston and Aberdeen. Its software developers include several highly experienced “industry gurus” supported by dynamic young computer engineers. Training and consultancy services benefit from decades of experience in data transcription, processing, and management from around the world. The whole Troika team is focused on providing data management techniques that maximise the value of your seismic assets while ensuring conformance to the latest industry standards. Troika also prides itself as being one of a handful of organisations in the seismic industry to have a majority female participation in ownership.

The Founders

Managing Director

Jill Lewis

Jill has extensive experience in providing solutions to the many challenges that can arise when preparing and future-proofing seismic information for data libraries, computer processing and workstation analysis. Jill has worked in seismic data management since 1981 when she joined DPTS. In 1985 Jill and Bob Firth co-founded Tape Technology where she helped facilitate the establishment of a global network of specialist seismic transcription and data management centres. Jill continued to support these operations after the company was absorbed by PECC until 1994 when she co-founded Troika International. Since then, under her management, Troika has grown from strength to strength through innovative technology and a focus on meeting or exceeding customer expectations. Jill is well known throughout the industry for her passion in championing the essential value of data management for verifying the contents of data libraries; quality analysis and repair; and ensuring data is fit for purpose when required by geoscientists and engineers. For more than twenty years Jill has also been highly active on the SEG Technical Standards Committee, which she has chaired and promoted in presentations at conferences around the globe. She has been instrumental in ratifying several industry standard formats, including SEG-Y_r1, SEG-Y_r2, SEG-D_r2.1. SEG-D_r3, and SEG-D_r3.1.

Technical Director

Bob Firth

Bob is an acknowledged world expert in seismic tape formats and the technical aspects of transcription and data management. He started his career in 1973 with GSI, where he helped to develop its field tape handling software. In 1977 Bob became a founding member of DPTS, where he developed transcription systems capable of handling a wide range of legacy media and data formats. He later became Technical Director for the Tape Technology group, which in 1991 was absorbed into PECC Limited, where he was the company’s Principal Software Engineer. Bob was a co-founder of Troika International when it was established in 1994, and subsequently designed the Magma next-generation transcription and remastering system while also providing consultancy services to a wide range of companies. In addition, he has been a key author on several SEG standards documents including SEG-Y rev 1 and SEG-D rev 2.


SEISMIC 2024 – Aberdeen

1st – 2nd May – Aberdeen, UK. P&J Live. Seismic in the evolving energy landscape Troika’s Jill lewis is speaking about TRAWLING / UPDATING SEISMIC DATASETS at the Seismic 2024 conference in Aberdeen. Her talk…

NAPE 2023 – Lagos

12th – 16th November – Lagos, Nigeria. Eko Hotel and Suite. Repositioning the Oil and Gas Industry for Future Energy Dynamics Please head over to stand H4 to see Petro Vision and ask to see…

ECIM 2023

ECIM 2023 – Haugesund

18th – 20th September – Haugesund, Norway. ECIM Work Stream – Data Sciences & Advances – Wednesday 20th September – 08:30 SEG-Y_r2.1 Exchange Data Format – Knowledge, Capture, Auto-Read – Jill Lewis, CEO, Troika International…


Troika is a leading participant in the SEG Technical Standards Committee and has been highly active in promoting best seismic data management practices through articles and presentations in upstream oilfield publications and international conferences. Troika also provides the chosen front end plug-in for major seismic data management and processing systems including Halliburton’s SeisSpace ProMax software family.

Troika Brochure

Click here to view and download the Troika Brochure

Upcoming Events
March 25, 20244th EAGE Digitalization 2024

25th – 27th March 2024, Paris, France.

Delivering better energy in a transforming world.

May 1, 2024Seismic 2024

1st – 2nd May 2024, Aberdeen, Scotland

The event will explore how seismic sustainably supports the UK’s energy security and Net Zero obligations.

June 10, 2024EAGE Annual 2024

10th – 13th June 2024, Oslo, Norway.

Technology and talent for a secure and sustainable energy future.

August 26, 2024SEG Image 2024

26th – 29th August 2024, Houston, Texas.

IMAGE ’24 highlights traditional petroleum geoscience topics while uncovering the latest energy market trends, science, and opportunities.

September 16, 2024ECIM 2024

16th – 18th September 2024

Details coming soon.

SEG-Y Seismic Data Exchange Format

A useful chart which shows the differences between SEG-Y rev0, rev1, rev2, and rev2.1. Published in Agile‘s blog post by Matt Hall, SEGY-Y Rev 2 again: Little-Endian is Legal!

For a printable copy – SEG-Y Revision Format Chart PDF.


Halliburton’s iEnergy® provides an easily accessible eLearning centre with E&P tools and resources, looks at industry standards and trends and encourages partner and customer relationships.  

Troika are pleased to be an iEnergy Community Partner.  

SEG Standards

Troika Managing Director Jill Lewis and Vice President Victor Ancira are past Chairs of the Committee and led a team that prepared the specifications for SEG-Y revision 2.0. The Committee serves as a forum for the discussion of geophysical developments in which standards for acquisition and processing of geophysical data need to be identified or improved. When data problems of a sufficient magnitude to warrant action by SEG are identified, an appropriate subcommittee is appointed to develop a set of standards and make a recommendation to the Executive Committee concerning their adoption.
Learn more about SEG Technical Standards 


SEG-Y has been the default standard for storing and exchanging processed seismic data since it was published in 1975. A revision in 2002 extended the standard to handle 3D acquisition and high-capacity media. Since then, extensive developments in data acquisition and processing capabilities such as time-lapse (4D), multicable, multicomponent and seabed data have continued to evolve, requiring a further revision of the format to ensure accurate capture of the data and associated metadata to future-proof valuable information on tape or disk.

In addition to previous capabilities, SEG-Y revision 2.0 provides for up to 65,535 additional 240-byte trace headers for metadata, more than 4 billion samples per trace, variable sample intervals and trillions of traces per line or ensemble. The revised format also supports additional data sample formats including IEEE double precision (64 bit), little-endian and pair-wise byte swapping to improve I/O performance, microsecond accuracy in time and date stamps and additional precision on coordinates, depths and elevations.
SEG-Y_rev2 March 2017


Troika is a member of the OSDU Forum.

Click here to visit the Forum for further information.

Format and Tape Capabilities

The Magma software allows the user to determine and subsequently read all standard SEG recognised field and non-field seismic data formats. These include all current versions of the SEGD field format as well as legacy multiplexed field formats SEGA, SEGB, and SEGC. All versions of SEGY can be read, including the latest SEGY Rev 2.

There are additional modules available that allow the user to read non-standard sequential and non-sequential tape formats. These can be specifically customised by the user to achieve this.

Legacy media can also be handled. These include:

  • 9-track tape
  • 21-track tape
  • IBM 3480/3490/3590 cartridge
  • DLT
  • LTO
  • Exabyte
  • DAT 4mm

Seismic data can also be copied from tape to disk as an exact copy as found on the input media using an internal encapsulation. The data can then be investigated, prior to reading and subsequent output.


Troika are sole agents in the seismic industry for the VeriTape® reader, a premier tool for diagnosing the health of Linear Tape Open (LTO) and 3592 tape cartridges.

Click here for further information.

Troika's understanding of seismic data is second to none

The Troika team has been involved with the SEG Technical Standards Committee since 1999. Members including Bob Firth, Jill Lewis and Victor Ancira have been driving the development, review and ratification processes of modern industry standards such as SEG-Y 1, SEG-Y 2, SEG-D 2.1, SEG-D 3 and SEG-D 3.1. The result is we understand seismic data recording formats better than any other company.

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