Since several years there is an intention in Poland to monetize the natural gas from marginal gas fields which are not connected to the national grid for many reasons especially for small gas deposits or they are geographically isolated, their production is declining or the gas is poor quality. An assessment carried out gives for the natural gas stranded potential the figures from 0.7 to 0.9 Tcf, including off-shore marginal deposits in Baltic Sea. Several options of these gas fields utilization have been taken into consideration and for moving these gas stranded reserves to the Polish market Among several solutions four main are regarded as the most feasible: (ⅰ) for small and medium size CHP generation units for local uses, (ⅱ) for Natural Gas Vehicles (NGV), (ⅲ) for LNG production in small scale projects, and (ⅳ) for Gas-to-Liquids (GTL) process plants producing Diesel Oil and/or kerosene especially in S-E part of the country where small size oil refining plants are existing and can use very pure D.O. or kerosene for blending. Mini co-generation, NGV and LNG have been chosen as the priority options but GLT can be aiso envisaged in some specific cases as a new niche for natural gas. While reviewing the existing marginal gas fields in Poland, determining the economics of envisaged solutions, comparing the economic indicators as break even gas values at the plant inlet and optimized size of the plants, we will finely select and recommend appropriate natural gas conversion methods which permit to move the natural gas stranded reserves to market in Poland.
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