Heidimiao Reservoir Depositional Characteristics And Stratigraphic Traps Distribution Prediction Of Fuxin Uplift In Songliao Basin

This paper studies Fuxing uplift zone the western margin Heidimiao reservoir in the centraldepression of southern Songliao Basin District. Based on analysis of logging, seismic andgeological data, the application of sequence stratigraphic theory, this paper establishes aframework of NenJiang Formation. According to stratigraphic traps exploration and developmenttheory, seismic sedimentology studies, and pre-stack inversion of seismic data to identify oil andgas technology, summed up the region’s stratigraphic traps into accumulation mode.Based on the sequence stratigraphy theory, combined with the core, seismic, logging,analysis of seismic reflection characteristics and core observation of the single well, this paperestablishes6third-order sequence stratigraphic interface in Nenjiang formation. NenJiang groupwere divided into5third-order sequences, according to seismic terminal response characteristicsand seismic facies types. According to the mudstone deposited, this paper estabilshes the forthlevel sequence boundaries and establish stratigraphic framework in the four sequenceboundaries of high precision. The third NenJiang formation were divided into3four-ordersequence.According to the core observation and analysis of well log curves, create single wellsedimentary microfacies in the Nenjiang formation, concluded underwater distributary channel,mouth bar and front sheet sand deposition and logging microfacies identification mode. Based onapplication of stratigraphic slicing technology, combined with the study of forth-order sequenceseismic sedimentology and the multi-attribute analysis of four-order sequences of differentfrequencies attributes, combined with sedimentary microfacies and well microfacies, threeforth-order sequence depositional micro-phase plane were created in Nengjiang third section.The forth-order sequence can identify5-10meters sands.Based on high-resolution sequence stratigraphic division, fine characterize the distributionof the sandstone reservoirs were studied. According to the analysis of stratigraphic trapsaccumulation conditions, analysis of the relationship of the configuration of the faults andhydrocarbon accumulation,and analysis of the relationship between the reservoir andhydrocarbon source rocks, this paper summarizes the the stratigraphic traps accumulation mode.The stratigraphic traps model includes sandstone updip pinch out of oil and gas reservoirs andsand lens oil and gas reservoirs, river lateral sealing oil and gas reservoirs.After a comprehensive analysis of logs, core, seismic, geology, oil testing information,through a combination of the application of high-resolution sequence stratigraphy andsedimentology, and based on the sequence stratigraphy and stratigraphic traps analysis, thispaper establishes the stratigraphic traps accumulation mode in the Nenjiang formation. Thestratigraphic traps were controlled by the sequence framework in vertical direction andcontrolled by sedimentary microfacies in the flat. This paper’s Ideas and methods of applicationof sand-shale of stratigraphic traps can provide a reference to the the oilfield in the evaluation ofexploration for stratigraphic traps.