Research On Channel Sand Body Architecture And Slight Interlayer Of Intensive Core Well In North Second Area

Late in the oilfield development, single sand body identification no longer meet theneeds of the development. Using a reasonable method identifying architecture of the sandbody and the remaining oil distribution become the focus of reservoir research. Taking fiveintensive sealed coring in the research area and adopting high-resolution sequencestratigraphy and fine sedimentary principles, track-peel comparison method of the strata bystrata for complex cut-stacked channel sand body is put forward on the basis of a variety ofmethods. This method effectively split the sand body and identify the single-channel sandbody. Considering of core and well logging data, the research have characterized flatsedimentary microfacies and single sand body distribution by sedimentary microfaciesidentification after the establishment of the sedimentary microfacies logging mode. There areinterlayers in the five intensive closed coring. Comparing lithology and electric property ofinterlayers, interpretation standards of interlayer lithology in the channel sand body areestablished. The research set the logging interpretation standards of relationship betweenlithology and barrier bed, and analyze the distribution characteristics of interlayer.Using the modern deposition, ancient outcrop, coring well, intensive development well,imaging logging data, the research adopt analytical hierarchy proces. The architecture of sandbody of meandering channel, braided channel, high sinuosity distributary channel andunderwater distributary channel is established by extracting parameters of sand body.Combinating4types architecture of sand body and barrier, the research conclude that thereare4types of framework of internal seepage in sand body, and establish4types of internalpenetration of the channel sand body distribution patterns and remaining oil distributionpattern with coring data analysis. The research can guide the oil field development.