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.