Abstract
Summary In enhanced gas recovery (EGR) a foreign gas type, such as CO2 or N2, is injected into the reservoir. The injected gas helps to maintain pressure, which leads to higher gas production rates and recovery factors. EGR also helps to maximize recovery of the gas condensate. If CO2 is injected, EGR could be a precursor to store CO2 storage in the reservoir if the project is transformed to a CCS/CCUS after EGR. If this route is chosen, EGR could have negative GHG emissions as the amount of CO2 stored will be higher than the CO2 emissions from the operations. Despite these advantages, EGR is not always economically viable. In some fields the required investments, outweigh the benefits. Proper screening of gas fields is thus important such that we can focus development effort on those fields where there is a high probability of favourable outcomes. This screening exercise should give us a reasonable estimate of incremental hydrocarbon gas and condensate can be expected from enhanced gas recovery. In this paper we will discuss how we used a newly developed set of analytical techniques for large number of fields in the Sultanate of Oman for potential application of enhanced gas recovery.
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