Despite a small increase in oil production and exports following the Geneva Interim Agreement, a more significant increase of Iranian crude production and exports can only result from an easing or lifting of international sanctions. In such a situation , a significant ramp-up in production and exports to pre-sanction levels would take (at the very least) three to four years from when sanctions are lifted. Years of underinvestment, maturing oil fields and a lack of field and well maintenance has damaged fields, possibly permanently , destroying some of the country's production capacity. Gas production will continue to grow slowly. However, similarly to oil, a lack of access to capital and technology will prevent production from accelerating sufficiently to meet surging demand. This will translate into gas shortages.