The Viura natural gas field is situated beneath the Autonomous Community of La Rioja, some 12 kilometres from Logroño, with proven reserves of 1 bcm. The complex has been in commercial operation since the end of January 2015, having been commissioned by Unión Fenosa Gas as operator in consortium with two other companies. The complex uses traditional methods to extract natural gas then conditions it at the processing plant before it is injected into the Enagás national gas transmission grid.
The Viura field is a geological structure dating back to the Cretaceous period, more than 100 million years ago, made up of sedimentary sandstone whose pores house natural gas at a depth of some 4,000 metres. Since that era, layer on layer of clay have been deposited on top of the porous sandstone, forming a perfect seal to maintain the water tightness of this field.
It is estimated that this field contains at least a proven volume of 1 bcm (or 1 billion cubic metres of natural gas), but there is a possibility that the porous rock could house even larger amounts. This proven volume would be the equivalent of five years supply at current consumption levels for the whole of La Rioja. Read more…
Article published in: FuturENERGY October 2015