Research On The Seismic Prdiction Methods Of Tight Reservoir

The main three categories parameters of reservoir characterization is reservoir lithology,physical properties and oil property. Is the main seismic information on seismic reservoir prediction, comprehensive logging, well testing, geology, oil production and analysis of test data in the research of reservoir distribution, lithology and thickness changes, physical characteristics, fluid and reservoir, a comprehensive research topic.Reservoir prediction technology is an important means that fine description and prediction the complex lithologic reservoir and its various types of reservoirs(such as structural reservoir and composite reservoir).This paper expounds the main technical method of reservoir earthquake prediction,seismic inversion technology, seismic attribute analysis technology, and the basic requirements of reservoir prediction.Carried on the thorough analysis of the basic principle of trace integral inversion, recursive inversion, sparse pulse inversion, based on model inversion and geostatistics inversion, further discussed the applicability, advantages and disadvantages of various inversion method and influence factors, at the same time this paper also discusses the seismic attribute analysis technology in detail,introduced several common mathematical model of seismic attributes and physical meaning, and the research and analysis of the seismic attribute extraction, optimization and analysis method.On the basis of study main technical method of reservoir prediction, this paper uses the Damintun sag geological, seismic, logging and core analysis data, in combination with regional geological background of the lower member reservoir of Damintun sag S4 systematic analysis and research. According to the lower member reservoir of Damintun sag S4 dense reservoir lithology of the complexity, the author classifies and short distance migration accumulation features, first proposed the use of rock porosity, permeability, rock brittleness of three parameters to establish reservoir “advantage lithology” sequence, clear forecast target,and using the data of core, system analysis S4 period of dense reservoir characteristics.At the same time, fully analysis and research on the log response characteristics between different lithology and lithologic identification is established for the first time chart, and lithologic secondary interpretation.On the basis of the division and correlation of high precision sequence stratigraphic framework,through well-seismic relationship analysis, using the linear regression of multiple seismic attributes and well seismic joint inversion method,for fine reservoir description and prediction.In brittle reservoir research, by the method of shear wave reconstruction, using sequential gauss configuration of simulation research on reservoir brittle.According to the dense oil geological evaluation standard, combined with the hydrocarbon source rock of forefathers’ research results, through the composite hydrocarbon source rocks, reservoir thickness, reservoir brittle three parameters comprehensive optimization “dessert area”.Reservoir characteristics research results show that the lower member reservoir of Damintun sag S4 reservoir lithology is given priority to with shaly dolomite, shaly siltstone,the pore distribution in 1% ~ 1%, mostly in 4%, permeability is less than 1 mD, pore types are mainly composed of micro corrosion holes, microfractures, overall have the double medium characteristics of cracks and pores,can be formed with shaly dolomite, shaly siltstone for dense oil reservoir of reservoir.Reservoir distribution prediction results show that the objective layer dense reservoir thickness plane distribution in the study area is relatively stable, reservoir total thickness mainly in the 20-150 m, work area in the northwest and southeast area for regional development better.Reservoir brittle research results show that the objective layer is in a good brittleness are each layer,the middle is better than that of the lower segment and upper segment, shaly dolomite brittleness is superior to other lithology.