*Enhancing Reservoir Performance of a Marginal Oilfield through Advance Well Placement Application in North China

W. Fei¹, L.S. Zhong¹, X.C. Hui¹, L. Cang¹, Y. Wang¹, X.G. Min², G.Z. Min², L.Y. Hua², L.Q. Lu2², and W.Y. Ling²

Abstract

The Du28 block located in North China that had been producing for more than 30 years, the highest primary oil production of 27000 ton/year was reached in 1982 with 300m to 500m well pattern. The reservoir fell into a significant production decline phase beginning in 1996. The reservoir was on the brink of obsolescence in 2010 when the primary oil production was 3500 ton/year and a 0.1% annual oil recovery factor was recorded. The lower sand communication, higher differences of oil/water viscosity ratio and imperfect well pattern all contributed to the lower overall development effect.

AAPG Search and Discovery Article #90188 ©GEO-2014, 11th Middle East Geosciences Conference and Exhibition, 10-12 March 2014, Manama, Bahrain