Research Of Sequence Stratigraphy Features And Fuyang Oil Layer Of Southern Changyuan In Daqing Province

Sequence stratigraphy is a research on unconformity or the surface for the boundary,causes the chronostratigraphy contact within a relationship between the lithology ofdiscipline. Mainly based on outcrops, core, earthquakes and logging geological andgeophysical data, combined with the relevant depositional environment andlithofacies-paleogeographical interpretation of stratigraphic sequence framework forcomprehensive geological interpretation. It involves biological stratigraphy andsedimentology and geochemistry, seismic stratigraphy, logging stratigraphy andeffectively division sediments.Through the analysis of sequence and sequence analysis, comprehensive analysis oflithology data, logging data and seismic data the sequence and system tracts oflithology data and logging data is explained，and build the framework of sequencestratigraphy of the fuyang oil layer of the Changyuan in Daqing Province and carrythrough the sequence stratigraphy correlation. Mainly achievement are as follows:1) Provenance analysisForm the heavy mineral pie-shaped map and contour map of ZTR, we can know thatthe mainly source of the work area is Wangkui-Qinggang depositional system.2) Single well facies analysisAccording to the lithologic character, drilling data and predecessors result, we canknown sedimentary facies of work area is delta front. Classify sedimentarymicrofacies of every well, and statistics the mainly microfacies.3) Single well sequence analysis and correlation of profile of wellsChose the GR, R25、AC etc. drilling data to identify the sequence boundary of146wells. Base on the key well(well Tai3), make three profiles: Up east west profiles,down east west profiles, vertical profile.4) Reservoir distribution regular patternAnalyse quality and regular pattern of reservoir, draw the reservoir profiles map, anddoing research of oil distribution regular pattern of Fuyang Formation：FuyangFormation has intact group. The distribution of oil/gas is controlled by unboiled oildepression, The distribution of sand body is controlled by sedimentary facies,5) Analysis of favorable place for prospectingCombination all maps we have drawn, analyse the favorable place for prospecting offuyang Formation of Caiyou Five area. Knowing that mainly reservoir is structuralhydrocarbon reservoir and favorable microfacies is distributary channel.In the study, we use sequence stratigraphy, and through the lithology and drilling dataobservation, we set up Caiyou Five area stratigraphic framework, and identify theboundary of four-stage sequence and sendimentary microfacies. Knowing thefavorable target area with over lapping all maps we have done, The faulted structurewell developed affect reservoir type.