| Basing on the application of high resolution sequence stratigraphy and sedimentary theory,the passage goes on stratum which is the S I reservoirs multi-level base cycles classification and correlation in Sa-zhong development area.Through establishment and identification of logging and combination of plane microfacies, sedimentary microfacies are made,and monosandbody are recognized. Through data of dense well, heterogeneity and remaining oil of the destination stratum which is studied is studied.At present,oil fields have went into extra-high water-cut exploitation stage. Especially so the Daqing oil field is. Reservoirs have been flooded by polymer. Remaining oil in space is highly scattered.The geologists realize that heterogeneity of reservoirs has great effect on the distribution of remaining oil,especially the fluvial sediment,so how to dig remaining oil has become a great difficult problem in exploitation of oil field.In order to describe the distribution of remaining oil exactly,we should do the research on the heterogeneity of reservoirs.In this text,we do the research on the S I layer.Taking high-resolution sequence stratigraphy theories as guidance,the high-resolution sequence stratigraphy framework of S I layer was built. The target layer of this study is the front distributary plain which include the microfacies of fluvial,sheet sand. This thesis is based on the core, drilling, logging,and so on,which is characterized by high-resolution information, connected with this area's sedimentary background.By the use of the identification of monosandbody,the facies were built.The study of heterogeneity of reservoirs including plane heterogeneity,inter layer heterogeneity,vertical heterogeneity describe the heterogeneity of the target layer.In the study of remaining oil in sand,the distribution of remaining oil was summaried.Those study not only increase the exactly describe of reservoir,but also do great help to finding remaining oil. |
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