Analysis and application of high resolution sequence stratigraphy of Shan 2-He 8 member in Sulige region

Based on the comprehensive analysis of outcrop,drilling core,logging and seismic data in Sulige region,using the high resolution sequence stratigraphy theoretical system and research method,based on the datum eustatic cycle,isochronous correlation,the sediment volume partition and accumulation type,sedimentary deployment system and sequence interface characteristics and other factors,according to Zheng Rongcai 3 grade sequence classification standard,the Sulige gas field upper Paleozoic Shan 2- He 8 member is divided into 4 long term cycles,10 middle term cycles.In the high resolution stratigraphic framework,the analysis of study area has been made on isochronous correlation interface on both sides is relatively stable,relatively thick,usually with vertical continuous overlay,lateral mutual overlay with connected blanked or band like distribution.The sand body layer within the sequence is relatively poor,large variation of thickness,local sand body although sometimes show a continuous laminated shape,but often laterally separated by a fine- grained sedimentary,mostly zonal distributed with partial connection.