The well, which was spudded on 10 December 2020, has been producing at a stabilised rate of 9,000 stock tank barrels per day (stb/d) of dry oil.
The flow rate, however, is limited by the size of the downhole electrical submersible pump, which is installed in the well.
In a press statement, Masirah Oil said: “Yumna 2 encountered ten metres of Lower Aruma sandstone with a porosity of 21%, proving that the good quality reservoir sand is extensive to the north of Yumna 1; the permeability is about 2,000md.
“The reservoir pressure depletion over the first year of production is around 100psi, confirming that excellent pressure support is provided by a strong aquifer.”
Masirah Oil spudded the third production well, Yumna 3, on 20 January 2021. It is being drilled using Shelf Drilling Tenacious Jack-up rig, targeting a crestal location in the field and up-dip from the discovery well GAS-1.
Upon completion of the drilling programme at the third well, the jack-up rig will be relocated to drill the Zakhera prospect, targeting a structure that looks similar to the Yumna field.
The Zakhera prospect is located about 12km to the south of the Yumna field.
The firm is also upgrading production facilities on the Yumna Mobile Offshore Production Unit (MOPU) to double the liquid processing capacity while accommodating production from the three Yumna wells.
The upgrade is planned for completion by the end of the first quarter of this year.
Rex executive chairman Dan Broström said: “We are very pleased that the Yumna 2 well was developed successfully and is now already producing 9,000bpd. When Yumna 1 resumes production and the new Yumna 3 is completed, we are looking forward to steady production from the three Yumna wells.
“We are therefore in the process of upgrading the present maximum liquid processing capacity to handle up to 30,000bpd. We will keep the market updated as soon as we have the results from Yumna 3 and the Zakhera exploration well.”
Last August, Oman’s national petroleum investment company OQ announced it is working with engineering firm Phazero to develop artificial intelligence software to predict component malfunctions in the country’s refineries before they happen.