Abstract:

Aiming at the architecture fine characterization of the fluvial reservoir in the offshore field under the condition of the large well distance and low well pattern, based on the vertical river channel period division, and combined with the recent classical quantitative method of sedimentology, we defined the reservoir boundary and mode simulation to determine the plane by the guidance of quantitative model, and the combination of well and seismic information, to achieve the quantitative characterization research for point bar sand body of subsurface meandering river environment. This method combined the advantages of dense well pattern dissection with the seismic stratigraphy, so that to approve not only the cross-well sand body extension prediction, but also the reservoir structural characterization precision. Meanwhile, we summarized the meandering river channel sand plane geometry form and its control mechanism. The results show that the quantitative characterization method of channel sandbody in surface meandering river by statistical analysis of modern deposits and outcrops is also feasible for the subsurface environment.

Key words: meandering river, reservoir architecture, geometrical morphology, quantitative characterization of point bar