Seismic Prediction Techniques Of The Dense Sandy Conglomerate Reservoir

Lithologic reservoirs and subtle reservoirs have been the primary exploration targets now and in the future on account of the continuous expansion of exploration area and the growing demand for energy.Because of its sedimentary environment and tectonic setting,dense glutenite reservoir has the following characters: strong heterogeneity,low permeability,low porosity and large difference of oil.It is a challenging work and in the meantime it has huge theoretical research value and scientific research value.Predictably,for a very long time in the future,glutenite reservoir still remains one of the most important research directions in oilfield development.Therefore,it is very helpful to have a deeper research on the sedimentary environment,regularities of distribution and reservoir features of sand-gravel fan,especially the spatial distribution law of fans located in continental faulted basin.Besides,people still need conclude a set of geophysical methods which are applicable to reservoir prediction at developing phase.Firstly,this paper summarizes the general situation of Yanjia field,at present,the main target of exploration in this area is the 4th member of Shahejie,which can be divided into upper sub member and lower sub member.Binshore subaqueous fan is the main type of the upper sub member,it has narrow range in landscape,restrogradation shape and is vertically superposed.When mountain rivers valley out directly into the shallow lake area,after rapid accumulation it will become near-shore subaqueous fan.Secondly,on the basis of seismic data analysis,we have finished synthetic seismogram calibration,horizon interpretation,well logging curves comparison,sedimentary phase contrast and glutenite period division.Then seismic attributes analysis is carried on to filter some sensitive attributes to glutenite.At last,through the wave impedance inversion,we obtain the favorable regional distribution of glutenite.In respect of reservoir description,we use 3D visualization technology andtransparent visualization technology to observe the fan body development situation,consequently providing a basis for the fan characterization.