Relations Between Sedimentary Microfacies And Lithologic Trap Of Fuyu Reservoir In South Songliao Basin

The SongLiao basin is our national northeast large-scale Mesozoic -Cenozoic sed- imentation basin,blongs to fault-cols type interrior basin. The basin has been filled thick reache 7000m the Cretaceous non-marine clastics sediment. South of SongLiao basin includes the southeast upheave area, the south of central-cols area, the south of west-pitch area and the north of southwest upheave area, west to Baicheng-Tongliao, north to Baicheng - Haerbin, south to Siping, east to boundary.of the basin.It include Jilin, Liaoning, Neimonggu three provinces (area), areas approximately 12 4,000 km2. There are Baicheng ,Huoshilin formation of Jurassic and Shahezi,Yin gcheng,Denlouku ,Quantou formation of lower Cretaceous and Qingshankou,Yao- jia,Nenjiang Sifangtai,Mingshui formation of upper Cretaceous stratums within the basin. This article take the fourth member of the Quantou formation as the research position, according to particular research relations between Fuyu reservoir and lith ologic trap , the sediment-system type of Fuyu reservoir and sedimentary microfac ies is definitude, its identifiability signs and forming patterns is establishwed, the relations between sedimentary microfacies and lithologic trap is analyzed. In con- clusion,the paper discuss form mechanism of lithological trap.This article through Siping,Jiutai,Gongzhuling etc field outcrop to observe, understand sediment-system type and sedimentary microfacies monomer, complex fabric characteristic of the fourth member of the Quantou formation. And through detailed describing about twenty well log of Fuyu,Xinli Chagangpao and Honggang etc areas in nourth of the south of SongLiao basin, generalized analyzing well enregistering,well logging and testing data etc materials of reconnoiter well,development well of research areas, there are three provenance,six water systerm is conformed including Yingtai,Honggang water systerm of west's provenance,Tongyu,Baokang water systerm of southwest's,Huaide,Changchun water systerm of southeast's provenance in research areas. As a whole,it is alluvial fan– river sedimentary systerms.There are alluvial– proluvial fan sediment in west of the basin, meandering river sediments in centre and north of research area,braiding river sediments between alluvial fan...