Resivoirs Deposition Characters Of Fuyu Reservoir In Yushulin Oil Field

Yushulin Oil field is located in Changwu town of Zhaodong City, which belongs toHeilongjiang Province. Because it doesn’t have a set of uniform and fine layering schemebetween different blocks in this study area, the reservoir sedimentary characteristics has a lackof systematic understanding. In this paper, based on core, log, logging, testing and laboratoryanalysis, and regional geological data, firstly, according to well location selection andstructure to confirm13cross sections and11vertical sections of framework section, thenbased on preferred well log curve, deposition interface option, sedimentary response featureand regional gradual closure, it can establish monosandbody isochronous stratigraphicframework. Secondly, by a comprehensive analysis of single well (core features,curvecharacteristics, reservoir physical properties, the modern deposition) and provenance systemanalysis (heavy mineral assemblages and ZTR index, layer thickness, sandstone thickness,sand ratio), it can determine reservoir sedimentary characteristics and loggingfacies model,then based on the above research, can describe each time unit and the key time unitmicrofacies in this region, combining large scale composite sandbody anatomy, singlesandbody identify, reservoir development characteristics, and so on, ultimately sums YushulinFuyang reservoir sedimentary evolution rule.Fuyang oil layer of Yushulin Oil field is mainly affected by the NortheastBaiquan.Qinggang material source, but southeastern material source only affects a few southwells; vertically it develops sedimentary cycle that the base level gradually rising and thesedimentary cycle is alluvial fan facies, braided river facies, delta facies. Development ofstrong hydrodynamic erosion bedding and obvious shallow characteristics are typical multicycle river delta deposit which is controlled river slope, and all kinds of channel sand bodyare well developed which is the quality reservoir; time unit plane microfacies indicate Fuyangoil layer is far source gentle slope river.delta sedimentary system, and there are somecharacteristics:1. shallow water2weak transformation wave3wide lakeside zone and gentleslope4.distribution of sand body which is controlled the river5diverse and gradual subfacies6.Quan.four.stage rapid water fluid7. meandering stream and distributary plain channel sandbody space cutting8.the limitations of”dry basin” multi.deposit which has five sedimentarymodel. Fuyang reservoir channel single sand body develops three kinds of cutting typevertically (fully separable, barely separable and totally inseparable), which is controlled bythe alternation of base.level.