Price policy is linked in each country to the development degree of its petroleum industry, the importance of the NOC's in its economy, national policy design, payments balance, control and collection policy; and a strategic vision regarding to the regulation levels and free market associated to cyclic conduct of the international prices of oil and their products. Thus, the margin obtained from prices structure in different markets is divided among oil companies and the State participation to guarantee the supply of fuel products to the final consumers.

It should be noted that there is a common denominator in all the countries, the taxes to naphtha's is high, in less grade for the Gasoil and reduced in fuel oil. The importance of this is to point out a subsidy by the State from the less productive activities to the more productive ones in relation to the uses. However, this conception is limited to the raw material fixed to low international price as it was seen in this last period, where a drop of oil price of 70% results in a close reduction of 30% in fuels according an importing country scheme. This paradoxically would result in an opportunity to reduce the fluctuations in oil prices through fuel prices as long as there is an incorporation through the regional markets.

This study case seeks to define a Macro-regional crude marker updated to fuel price FOB in connection with the "Norperuano pipeline" that transports heavy oils of 18° API from Marañon Basin to Talara Refinery, determining an optimum price of the ‘NET-BACK’ basket for crudes of the oilfields connected to this pipeline. This price will be determined from the valuation provided from the fuels basket in the intern market around the surrenders of the refinery. It will pass through processing cost of the refinery to its maximum capacity deducting a minimum refine margin to the setting of transportation costs, whose reduction will be associated to more using in its capacity through production increasing of heavy oils. This seeks to contract or activate the oil price in unfavorable conditions to the incorporation of upstream-downstream chain searching an optimum oil price.

With an adequate estimate of macro-regional oil price in real time, it is expected to obtain balanced results between the profitability of Upstream and Downstream activity; to this, it is expected the reduction on transportation costs associated with production increasing. This will guarantee long-term investments according to contractual schemes, reducing the uncertainty of audited crude sales price, the royalties to be transferred to the society through canon and fuel prices accessible to final consumer.

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