Favorable Reservoir Pediction Of The Third Sand Group In The Upper Member Of Guantao Formation In The Eastern Part Of Gudao Oilfied

The east area of the Gudao Oilfield is in the east wing of the"middle sag"in the Zhanhua sag,which belongs to the river facies sedimentary system,and the Guantao formation in the east area is a channel sandstone reservoir under the tectonic setting.The region is controlled by both structure and lithology,with low seismic resolution,fast sandstone character change,difficult to identify and describe,and further evaluation of the oil content of sand body,which restrict the rolling development of this area.Therefore,to carry out the characteristics of the sedimentary facies of the target layer of the study area,predict the favorable reservoir plane distribution and clear the law of the oil content of the sand body can provide the basis for the further exploration of the oil and gas and guide the rolling development in this area.Based on the geological characteristics of the exploration area and using the seismic reservoir prediction technology as the research means,this paper focuses on the reservoir of the third sand group in the upper member of the Guantao formation.Based on the discipline principle of sequence stratigraphy and sedimentology,stratigraphic division and contrast are carried out on the target layer,and the study of sedimentary microfacies is carried out on the basis of the second,and the favorable reservoir prediction is carried out by using spectral decomposition technique,attribute analysis technique and log constrained sparse pulse inversion technology.On this basis,absorption attenuation is used.The oil and gas are analyzed by technology,and the favorable target is selected for reserve estimation.The purpose of the study area is to select favorable reservoirs and favorable targets,so as to lay a solid foundation for further exploration and development.Using the data of drilling,geology,earthquake and logging,the comprehensive seismic reservoir prediction of the three groups of sand in the upper section of the East District of Gudao oilfield is carried out by using the properties analysis,seismic phase and inversion technique.The oil water interface and reservoir distribution characteristics are clearly defined,the new oil area of 1.2km~2 and the amount of geological resources are 153.Ten thousand tons.A set of work ideas and technical means for the description and evaluation of the thin layer sandstone reservoir in the Gudao area is explored,which provides technical support for the future work in the area and has great guiding significance for the rolling exploration in the island area.