Study On Sedimentary Reservoirs And3D Geological Modeling Of Chao631Block

The Chao631block is typical low permeability and high watercut stage reservoirs of thethird class block in Chaoyanggou Oilfield.Characters of small channel sand scale of reservoirs,developed well isolated sand bodies and high heterogeneity all lay restraints on injection andproduction correlation of well pattern and remaining oil potential tapping.In order to furtherimprove the oilfield development results, it not only needed to re-understand the sedimentarysandbody distribution, but also recognize the spatial distribution characteristics of reservoirheterogeneity.In this paper, based on the geological characteristics of Chao631block, sand bodyprediction is carried out by lithology analysis of reservoirs, log-standardization andgeostatistical stochastic inversion method. It can accurately characterizes the continuity,length extension and trend of small channel, improve the sedimentary micro-facies of41sedimentary unit of reservoirs and improve the accuracy of sandbody distribution.Accordingto the research of geological modeling technology at home and abroad, choosefacies-controlled reservoir property modeling technology suitable for Chao631block.3Dtectonic frame is established based on seismic data,3D sedimentary model is established byusing the sedimentary micro-facies diagram of sandbody distribution, and the3D reservoirproperty model is established by using the sequential indicator simulation. The geologicalmodel can well describe the spatial variation of reservoir heterogeneity. There is an importantguiding significance for identifying remaining oil enrichment area, guiding the developmentpotential measurements and improving the development effects of oilfield.