Energy data and AI specialist Enverus has expanded its subsurface data offering with the acquisition of the A2D well log library from TGS, bringing what it says is the world's largest commercial well log database onto its energy intelligence platform.

Announced on 8 July, the deal adds more than eight million depth-calibrated raster logs, 1.9 million digital LAS files and over five million proprietary well logs covering every major US producing basin.

Financial terms of the transaction were not disclosed.

Enverus said integrating A2D's well logs, formation tops and petrophysical data with its existing production, completions, land, ownership, cost and economics datasets will give customers a more connected view of the subsurface, helping them move from geological interpretation to commercial decision-making more quickly.

"We have always believed energy data becomes more valuable when it is connected," said Manuj Nikhanj, CEO of Enverus.

"A2D brings subsurface depth and quality that customers have trusted for decades. When logs, tops and petrophysics can be connected with production, completions, ownership, costs and economics, teams can move from understanding the rock to understanding the return."

The acquisition also brings more than two million interpreted formation tops, basin temperature models and analytics-ready log attributes into the Enverus platform, allowing users to carry out basin-scale reservoir analysis without moving between multiple systems. Existing A2D licensing and subscription agreements will remain in place.

For TGS, the transaction marks the next chapter for a well log library that has been built up over more than three decades.

"We built the A2D library into something the industry depends on, and this transaction ensures it keeps getting better," said Kristian Johansen, CEO of TGS.

"Our customers have always wanted to take this data further into their workflows. Enverus gives them the platform to do that."

The acquisition follows Enverus' recent purchase of PDS Energy Information's exchange assets and reflects the company's wider strategy of bringing together subsurface, operational and commercial data within a single platform to support energy companies across the asset lifecycle.