Masirah Oil brings third Yumna well online

Oil and gas company Masirah Oil has started production from the third development well drilled in the Yumna field located in Block 50 offshore Oman and the rig has moved south of the field to drill another exploration well.

Shelf Drilling Tenacious rig is drilling Yumna wells for Masirah Oil
Shelf Drilling Tenacious rig is drilling Yumna wells for Masirah Oil. Source: Shelf Drilling

Masirah said on Monday that the well was spudded on 20 January 2021 and production started on 18 February 2021.

The well was drilled using the Shelf Drilling-owned Tenacious jack-up rig.

The well has been tested at a rate of 12,984 stb/d of oil on natural flow through an 80/64” choke.

According to Masirah, Yumna 3 encountered hydrocarbons in 10.4 metres of Lower Aruma sandstone with a very good porosity of 23.4 per cent, proving that the good quality reservoir sand is extensive to the South East of Yumna 1, with exceptional permeability of about 2,000 md.

The reservoir pressure depletion over the first year of production is around 100 psi, confirming that excellent pressure support is provided by a strong aquifer.

Masirah Oil has now drilled and produced first oil from three Yumna wells.

The first well, Yumna 1, was spud on 26 December 2019 and the first oil flowed into an Aframax tanker in February 2020.

The Yumna 2 well was spudded on 10 December 2020 and production started on 23 January 2021.

The Shelf Drilling Tenacious jack-up rig has been moved from the Yumna field to the Zakhera exploration well location which is about 12 km to the south of the Yumna field.

Masirah Oil holds a 100 per cent interest in the Block 50 Oman concession. Rex International holds an effective interest of 86.37 per cent in Masirah Oil.

Dan Broström, Executive Chairman of Rex International, said, “The next step is to put all three production wells (Yumna 1, Yumna 2 and Yumna 3) on production simultaneously.

“For this reason, the processing capacity on the Yumna Mobile Offshore Production Unit (MOPU) is being upgraded to handle up to 30,000 bpd. We expect the upgrade to be completed in March 2021. The operating costs for the field are estimated at $80,000 per day, which with higher production levels, will translate into lower production cost per barrel”.