The focus on improved development strategies has strengthened over the last 10-15 years, and can partially be traced back to the decrease in field size that has been experienced. While the size (5 year moving average) of discovered reserves in the beginning of the 80’s was between 80 and 100 million Sm3 oe for the North Sea, the corresponding figures since 1990 has been below 20 million Sm3 oe. The reduced size has made new fields become economically more marginal, and has put emphasis on the need for so-called flexible development strategies.
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