Sedimentary Characteristics Of Fuyu Reservoir In Sanzhao Depression

After decades of exploration and development,the reservoir of Sanzhao Depression has formed several development blocks.And there is no uniform and fine stratification scheme between the different blocks and the lack of understanding of the whole reservoir characteristics.This paper firstly established 10 horizontal and 10 vertical sealed skeleton profiles in the study area through well site selection and structural confirmation.Then,by selecting well logging curves,selecting appropriate isochronal interface,sedimentary characteristic response,mineral composition analysis and zonal approximation and comparisons,and the regional closure progressive ascent,finally established the formation of the whole area of single sand-level isochronous stratigraphic framework.And then,this paper have also developed a comprehensive evaluation of individual wells,and provenance analysis,and the sedimentary characteristics of Fuyu reservoir are determined.And then,to established the multi-geological information logging microfacies model,and then finely dissected the sedimentary microfacies of each time unit in the whole area and each development zone,and plotted the sedimentary microfacies map of the key time unit in the whole area.Finally,this paper summed up Sanzhao depression Fuyu oil layer deposition evolution rule.According to regional sedimentary background analysis,stratum thickness variation,sandstone thickness variation,heavy mineral assemblage analysis and fine anatomy in the development area,the Fuyu reservoir in Sanzhao Depression is mainly influenced by southwestern Baokang and northeast Baiquan –Qinggang provenance.With the analysis of rock-electric relationship,the model of 1 sedimentary facies,2 sedimentary subfacies and 15 sedimentary microfacies logging in Fuyu reservoir is established.According to the mudstone color,the FI11~FI42 and F?42~F?52 lake basins are determined according to the logging data.According to the distribution of heavy minerals,reservoir formation thickness,time unit thickness and sand body sand distribution rules,and then identified for each time unit of the North-South source boundary.Combined with logging facies model,sedimentary facies model,formation isometric map and sandstone isopach map,and then map the sedimentary microfacies of the key development area and the whole area,and summed up the Sanzhao depression Fuyu reservoir,on the whole,the sedimentary evolution sequence is that the first water back into the water into the water.