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New production from bypassed oil on the oilfield Kozarica

Production problems on the oilfield Kozarica are caused by combination of relatively heavy oil and the nature of the reservoir itself. Lithology of the reservoir is presented by shale with the alternations of unconsolidated to poor consolidated sand. Water injection to accomplish ultimate recovery increase, didn’ t result as was expected. On the contrary, it caused quick water breakthrough into production wells, so they are finally closed. In order to increase production and ultimate recovery on this particular oilfield, we decided to drill new wells to reach bypassed oil. Part of each wellbore that goes through the reservoir is almost horizontal and 100 m long. Correctly defined locations of two new, already drilled wells, gave us expected results. Because of pethrophysical characteristic these wells are completed with gravel pack. The next well will be completed with expandable screen.

Bypassed Oil; Horizontal Wells; Sand Alternations in Shale; Sand Control; Gavel Pack; Expandable Screens.

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