Research On Sedimentary Characteristics Of Fuyu Oil Reservoir In Changchunling Area

In this paper,the guidance of sequence stratigraphic theory,to adopt an integrated dataof core information,well log data,seismic data,By using the method of computer,andanalytical technique of substratum plane microfacies,Carrying on the accurate stratigraphicclassification and correlation on Fuyu oil reservoir in Changchunling Area,Seting up thesedimentary facies indicator,To determine the distribution of substratum microfacies,thedistribution regularity of single sandbody and oil&gas reservoir has been revealed．Above all,by the guidance of high resolution sequence stratigraphic new theory,Toconstruct the standard section and standard well of Fuyu oil reservoir in the researchingarea．On the base of the controlling of marker bed,sedimentary cycle,thickness,andcombination of well data and seismic data,To establish isochrohal stratigraphic frame of highresolution sequence in the researching area．Subsequent,on principle of base-level cycles,On the base of interfacial property,diagnostic thickness,sequence structure,stacking pattern,The fourth member of QuantouFormation can be divided into4medium period cycle and13short period cycle,corresponding to the4sand sets and13subzones．The formation interface of every mediumperiod cycle is the scour surface of bottom of river tunnel,or the flood surface,or thelithologic turn around surface．Reflecting the evolving process of continuouslly water depthof becoming deeper and deeper．Demonstration of researching,that lithologic feature,diagnostic thickness,loggingcharacteristic curve of natural gamma ray and resistivity of13substratum of the fourthmember of Quantou Formation,and longitudinal change trend characteristics,all these can becompared relatively strong．The distribution,vertical evolution characteristic,type and featureof the sandbody and so forth also can be comparability and coordination of evolution verywell．The provenances of the researching area may be mainly controlled by the sedimentarysystem of East parts and South parts of Changchun-Huaide,and there are2types of subfaciesand6types of microfacies,the sedimentary background is mainly shallow lacustrine delta,there are mainly the upper-river channel and overlying-water inter-estuarine microfaciessubfacies of delta plain subfacies,secondarily there are underwater distributary channel,underwater inter-estuarine and sheet sand microfacies of delta front subfacies．.