La Cira-Infantas oil field (LCI) in the Middle Magdalena Valley Basin of Colombia has estimated original oil in place of 3700 million barrels. However, cumulative production of more than 1700 wells has not exceeded 724 million barrels. The recovery factor is about 20%.

About 55% of LCI wells were drilled before the development of borehole logging. Dickey (1992) wrote of this area: “Before electric logging, it was impossible to see where the individual pay sands were by examination of the cuttings. Consequently, many sands were shut off behind pipe.” Thus, in mature oil fields like LCI with low recovery factor,...

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