Study On Geologic Model Of The Lower And Middle Of Es₃ In The Region Of Huzhuangji,Dongpu Depression

The object of this paper is the lower and middle of Es3 in the block of H99,Huzhuangji region,Dongpu depression.Core,well logging,seismic and other data were used for the reseach of geologic model for the target intervals in the study area.Then the model of lithofacies association,sand architecture and seismic facies was established.Due to the restriction of well data,the paper used the working methods of combining well with seismic datas to divide the middle of Es3 into twelve small layers and divide the top of the lower of Es3 into six small layers.In this stratigraphic frameworks,the paper divided different kinds of sand bodies by different origin and analyzed the configuration elements,especially the study of configuration elements for logging facies model and then established the model of lithofacies association under different small layers.There are braided-river delta front subfacies developed for the studied intervals in the study area,which are indicated by the facies marks of the type of rock,sedimentary structure,logging and seismic,as well as the analysis of single-well facies and plane facies.On the basis of the sedimentary facies study,considering the information of logging data and the characteristic of seismic response in the connecting-wells profile,the paper studied the sand architecture pattern.Then,it established the model of sand architecture under different kinds of sedimentary microfacies.Found that sand usually contiguous developed when the underwater braided channel microfacies developed and the main sand architecture pattern are cut type and superimposed type.While when the inter-channel,mouth bar and sheet sand microfacies developed,sand usually isolated developed.Through the application of the spectral analysis,spectral decomposition,time-frequency analysis and the study of the seismic attribute in the study of seismic sedimentology,the following two points could be found.First,the technologies above have good application effect in the study area.Second,not all of the lithological association have seismic respond and the seismic respond from different kinds of lithological association are same or different.Then,it introduced the study of the model of seismic facies.On the basis of studying seismic facies,the paper analyzed the seismic wave dynamics parameters which is amplitude,frequency and continuity.Under the control of it,the model of seismic facies which can find out the lithology combination corresponding to the seismic response can be established.