Favorable Reservoir Distribution Regulations Of Palaeogene In Northern Slope Of Chenjiazhuang Uplift

Northern Slope of Chenjiazhuang uplift has undergone decades of exploration and development process,but their understanding still mainly stayed in the macro research,which hasn't been systematically understood in the development of reservoir characteristics and favorable reservoir distribution rules.Therefore,this study starts from establishing stratigraphic framework,determining the distribution characteristics of depositional systems,and then describing the characteristics of reservoir microscopic,in the final discussing the favorable reservoir distribution rules.In the process of the study,the main ways contain three-dimensional seismic,logging,core measured data,and laser particle size analysis data with the application of the theories of seismic sedimentology,sequence stratigraphy,sedimentology and reservoir petrology and other infrastructure theory to study in detail of the above mentioned contents.The establishment of sequence stratigraphic framework first based on the three-dimensional seismic data,combined with logging data in lithologic information to recognize three Paleogene stratigraphic sequence boundaries in the study area.In control of the third-order sequence interface,infrastructure under the well logging data electrical characteristics portrayed in its internal fine,eventually Paleogene strata in the study area has been divided into four sequences,and seven system domains.Accept of ES4,only LEST developed,other system domains,Ed,ES1-2 and ES3 have the development of LEST and HST.Research on depositional system is mainly divided into two parts,the identification of the types of sedimentary facies and the determination of sedimentary facies of the scope.Sedimentary facies identification main takes advantage of the structural characteristics structure,seismic phase data logging phase;the spread range is determined mainly using multi-attribute analysis,sand to layer contour line method.On the basis of the above methods,they defined the types of sedimentary facies,braided river delta and fan delta-based,sand during a two-stage development of carbonate shoal;and revealed sedimentary system distribution characteristics.By the microscopic observation of paleogene reservoir in the study area and the analysis of test data sheet,the microscopic characteristics of the reservoir were studied.Due to shallow depth,reservoir porosity natively development a lot,better connectivity between the pores,some secondary porosity developed in the deep,while some of the major diagenesis in the study area are developed.Measured by core data,comprehensive geological,logging,drilling,core analysis data,logging data standardization,based on core location of porosity and permeability interpretation model,to lay the foundation for favorable reservoir distribution studies.Physical properties as the main basis,combined with reservoir lithology,porosity characteristics,this study proposed Chenjiazhuang northern slope with the evaluation criteria paleogene reservoir.Greater than 30% porosity,280 × 10-3?m2 permeability,lithology pebbly sandstone,coarse sandstone reservoir optimal reservoir.Favorable reservoir distribution in space with a difference,in general,the projection western and eastern regions are the main location of favorable reservoir development,lace-like seaweed on the plane was spread,the vertical multi-stage stacked.Favorable sand body distribution is affected by many factors deposition,diagenesis and faulting events.Braided river delta front sand body is the best,which is the main development zone of favorable reservoir the transformation of different types of reservoir diagenesis reservoir properties vary;faulting activities by controlling the sand distribution range and hydrocarbon migration,to control the favorable reservoir development comprehensively.