Press Kit

GeoMaster for Journalists and Partners

Facts, descriptions, our story, logos and images, ready to use. Questions? Email hello@geomaster.uk.

Last updated: 12 November 2026

About GeoMaster

GeoMaster® is geosteering software that runs in the browser, so the geosteerer, the driller and the office work in one project. It is made by Greenstone Energy Ltd, a UK company founded by petroleum and drilling engineers.

GeoMaster® is a registered trademark in the United Kingdom (UK00004424070).

Quick facts

  • Product: GeoMaster, browser-based geosteering software (SaaS)
  • Company: Greenstone Energy Ltd, registered in England and Wales, company number 17151768
  • Started: 2018, as an in-house tool; officially launched in 2026
  • Headquarters: 124 City Road, London, EC1V 2NX, United Kingdom
  • Founders: four petroleum and drilling engineers with field experience in geosteering, directional drilling and subsurface operations
  • Pricing: Free plan; paid plans are Basic, Pro and Enterprise (prices exclude VAT)
  • Website: geomaster.uk
  • Company website: greenstone.energy

Descriptions you can use

One line

GeoMaster® is browser-based geosteering software with a built-in AI assistant, GeoEngine.

Short (about 50 words)

GeoMaster® is geosteering software that runs in the browser. Teams correlate horizontal wells against a type well in GeoMatch, track every survey against the plan in DrillTracker, and check their interpretation with GeoEngine, an AI assistant that prepares changes for the engineer to approve. GeoMaster is made by Greenstone Energy Ltd in the UK.

Long (about 110 words)

GeoMaster® is geosteering software that runs in the browser, so the geosteerer, the driller and the office work in one project. GeoMatch correlates the lateral against a type well, segment by segment, and recalculates instantly as the user adjusts it. DrillTracker compares every survey with the well plan and its revisions. Logs come in from WITSML 1.4.1.1 servers or LAS files, and every saved interpretation is kept as a permanent version. GeoEngine, the built-in AI assistant, reads files before import, checks the interpretation and says where the well sits in the target zone; nothing is saved until the engineer approves it. GeoMaster began in 2018 and is made by Greenstone Energy Ltd in the UK.

Our story

  • Before 2018: the founders ran a drilling service company, delivering directional drilling with geosteering bundled in, using third-party geosteering software.
  • 2018: that software left the market in the middle of a contract. With wells still to steer, the team started building its own in-house tool.
  • 2018 to 2020: the software was developed with a university partner, with the team providing the R&D and the field problems.
  • 2020: R&D contracts to turn the tool into a product.
  • 2022: the software reached a technology readiness level suitable for industrial use.
  • 2024: rebuilt as cloud software (SaaS) that runs in the browser, with every feature made interactive.
  • 2026: Greenstone Energy Ltd incorporated in England and Wales, and GeoMaster officially launched.

The full timeline is on the About page.

What GeoMaster does

  • GeoMatch: stratigraphic correlation of the lateral against a type well, recalculated in the browser as you drag. More
  • DrillTracker: every survey against the active well plan, across every plan revision, with the last survey projected to the bit. More
  • GeoEngine: the AI assistant. It reads files before import, checks the GeoMatch and says where the well sits in the target zone. Nothing is saved without approval. It also works inside Claude and ChatGPT. More
  • WITSML and LAS: logs from a WITSML 1.4.1.1 server or LAS files. More
  • Version history: every saved interpretation is kept as a permanent version. More
  • Free tools: MD to TVD converter, survey calculator, dogleg severity and apparent dip calculators, and a LAS viewer, with no account needed. More

In development: LookAhead, ahead-of-the-bit prediction. It is not released yet.

Research

At the LPS New Technology Seminar in London on 5 November 2026, Greenstone Energy presented research on agentic AI and machine learning for real-time structural and stratigraphic interpretation of LWD data in horizontal wells. More than 20 experts were asked whether they trust automatic interpretation; none of them does. The missing piece is context: field reports, drilling data and the judgement of the person reading the geology. Watch the talk

Leadership

  • Amin Ahi, Co-founder and CEO: petrophysicist and business leader with more than 15 years in oil and gas; conceived GeoMaster in 2018.
  • Amin Abbasi, Co-founder and CQO: drilling engineer with more than 15 years from the rig to technology leadership; leads quality.
  • Siavash (Sia) Salehi, Co-founder and Business Development Manager: 12 years in business development across oil and gas and global enterprises.
  • Kiarash Angoshtary, Co-founder and Chief Product Officer: petroleum engineer who moved from real-time geosteering into product leadership; has led GeoMaster's product since 2023.

Full biographies are on greenstone.energy.

In the news

Coverage of GeoMaster will be listed here.

Press contact

For interviews, images or more information, email hello@geomaster.uk. We aim to reply within one working day.