What is infill drilling and why was it used at the Wassana field?

Infill drilling involves drilling new wells within the established boundaries of an already producing field to target pockets of oil that were bypassed by original recovery wells. At the mature Wassana field, this technique allows Valeura to boost production and maximize resource recovery using existing infrastructure, making it highly cost-effective.

Who is Valeura Energy and how did they acquire this asset?

Valeura Energy is a Canadian-listed public oil and gas company that historically focused on assets in Turkey. The company strategically pivoted to Southeast Asia by acquiring operated interests in several shallow-water blocks in the Gulf of Thailand, including the G10/48 license containing the Wassana field, to establish a portfolio of cash-generating oil assets.

What rig was used for this offshore drilling campaign?

The drilling program was executed using the 'Mist' jack-up rig, a modern drilling unit owned by Borr Drilling. Following the successful completion of the eight-well campaign at Wassana, the rig has been safely demobilized from the location to proceed to its next scheduled contract.

Offshore Energy · June 19, 2026 (Jun 19) · 1 min read

Eight-well drilling program ups oil output at Southeast Asian offshore field

Analysis

AI-assisted analysis · reviewed by Yuri Kan

Valeura Energy's successful completion of its eight-well infill drilling campaign at the Wassana offshore field in the Gulf of Thailand marks a critical operational milestone, significantly boosting the asset's daily crude production. This campaign underscores the viability of late-life shallow-water assets in Southeast Asia when managed by nimble, independent operators utilizing targeted infill drilling. By optimizing recovery from existing reservoirs, the program enhances the asset's economic runway and demonstrates the ongoing value of brownfield developments in a mature basin.

Key Facts

Canada-based independent operator Valeura Energy has successfully concluded an eight-well infill drilling program at the Wassana oil field, located offshore in the Gulf of Thailand.
The drilling campaign was executed using the Borr Drilling-owned 'Mist' jack-up rig, which has now been demobilized from the field.
The multi-well program successfully targeted unswept oil pockets within the mature reservoir, resulting in a direct increase in the field's total daily oil output.
Valeura Energy holds a 100% operated working interest in the G10/48 license, which contains the Wassana field.
The successful campaign aligns with Valeura's broader strategy to maximize cash flow and extend the economic life of its shallow-water Southeast Asian portfolio.

Background & Context

The Wassana field, located in the shallow waters of the Gulf of Thailand, has a history of operational interruptions, including a suspension of production in 2020 under its previous operator before Valeura acquired the asset. Valeura Energy, historically focused on tight gas exploration in Turkey, pivoted strategically to Southeast Asian shallow-water oil production to secure immediate cash-generative assets. Infill drilling campaigns like this one are standard industry practices for mature fields, aiming to tap bypassed hydrocarbons without the massive capital expenditure required for new greenfield developments.

Market Impact

This successful drilling campaign solidifies Valeura Energy's position as a highly capable operator of mature offshore assets in Southeast Asia, boosting investor confidence in their operational execution. For the local Thai energy market, the incremental increase in domestic crude production helps offset natural declines in the basin and reduces reliance on imported barrels. The project's success also benefits oilfield service providers in the region, signaling that brownfield optimization remains a highly active and lucrative segment despite global capital shifts toward transition energy. Furthermore, the cash flow generated from Wassana will likely fund Valeura's deeper exploration prospects and potential M&A activity in the region.

What to Watch

Following the demobilization of the 'Mist' jack-up rig, observers should monitor the stabilized production decline curve of the Wassana field to assess the long-term efficacy of these infill wells. Valeura's next steps will likely involve integrating this new production data into their reservoir models to plan potential future drilling phases or water-flooding initiatives. Additionally, the market will watch how the company allocates the newly generated cash flow, particularly regarding potential expansion opportunities elsewhere in the Gulf of Thailand or broader Southeast Asia.

Frequently Asked Questions

What is infill drilling and why was it used at the Wassana field?: Infill drilling involves drilling new wells within the established boundaries of an already producing field to target pockets of oil that were bypassed by original recovery wells. At the mature Wassana field, this technique allows Valeura to boost production and maximize resource recovery using existing infrastructure, making it highly cost-effective.
Who is Valeura Energy and how did they acquire this asset?: Valeura Energy is a Canadian-listed public oil and gas company that historically focused on assets in Turkey. The company strategically pivoted to Southeast Asia by acquiring operated interests in several shallow-water blocks in the Gulf of Thailand, including the G10/48 license containing the Wassana field, to establish a portfolio of cash-generating oil assets.
What rig was used for this offshore drilling campaign?: The drilling program was executed using the 'Mist' jack-up rig, a modern drilling unit owned by Borr Drilling. Following the successful completion of the eight-well campaign at Wassana, the rig has been safely demobilized from the location to proceed to its next scheduled contract.

Read on Offshore Energy