Valeura Energy has completed an eight-well drilling campaign at the Nong Yao oil field in the Gulf of Thailand, increasing production and successfully deploying its first multi-lateral development well.
The drilling program was carried out at Block G11/48, where Valeura Energy holds a 90% operated working interest. The campaign comprised one appraisal well and seven horizontal development wells drilled from the Nong Yao A and B platforms.
According to the company, the appraisal well successfully encountered its target reservoir and is expected to support future development drilling from the Nong Yao A platform. The seven development wells also reached their planned targets and have since been brought into production.
One of the campaign’s key achievements was the completion of well NYA-42ST1H, which established a new Gulf of Thailand record for the longest horizontal lateral drilled at 4,960 m.
The drilling work was conducted alongside a well workover program on the Nong Yao B and C platforms aimed at improving well performance. As a result, aggregate field production increased to approximately 10,500 bbls/d during the seven-day period ending 16 June 2026, compared with an average of 8,870 bbls/d during the seven days ending 4 April 2026.
Dr. Sean Guest, President and CEO of Valeura Energy, said the company continued to access new oil reservoirs through ongoing drilling activities while increasing production from its largest producing asset. He also noted that the campaign demonstrated the potential of multi-lateral drilling to improve development efficiency in the Gulf of Thailand.
A significant milestone was the company’s first multi-lateral development well. Within the NYB-02ST1 wellbore, Valeura Energy created a complex junction that enabled two separate horizontal production legs to be drilled, with each leg targeting a different reservoir interval.
The company said the well represented the most complex multi-lateral drilling operation attempted in Thailand to date. The two production laterals are now delivering oil from separate reservoir targets while using a single well slot on the production facility.
Valeura Energy is evaluating additional opportunities to apply multi-lateral drilling across its Gulf of Thailand portfolio, including future wells that could incorporate two or more production laterals.
Following completion of the Nong Yao campaign, the contracted drilling rig moved to the Jasmine field in Block B5/27. There, the company plans to undertake a five-well drilling program comprising three single-bore development wells and one multi-lateral development well with two wellbores.
The drilling campaign will be carried out by Borr Drilling using the jack-up rig Mist, which remains under contract to Valeura Energy in Thailand until August 2026.
