Reservoir Characteristics Of Putaohua Oil Layer For Daan Block In Yingtai In The South Of Gulong Region

The location of study area is Gulong in the west of Daqing placantcline,and the reservoir contains six sets of oil layer.Especially,it is not deep enough for the characteristic studying of Putaohua reservoir;distribution of oil-water layers is not well understood;sedimentary system is not clearly defined;Reservoir characteristics research is not systematic;The law of oil and gas accumulation is not clearly understood.All of the above causes an obscure scale of the available oil and gas which comes from the target layer of the block.In this paper,on the basis principle of high resolution sequence stratigraphy,sedimentary petrology and geophysical,take advantage of core description,comprehensive seismic,well logging,mud logging and other information to make sure different levels of the cycle sequence boundaries in the research area of Putaohua oil layer,to establish a unified sequence stratigraphy framework,sedimentary system and reservoir characteristic research.Through the horizon calibration of seismic geologic,elaborate stratigraphic division and correlation,on this basis,through the refined core description,sedimentary structure analysis of flow genesis and analysis of core facies,logging facies model,single well facies,section facies and provenance,the characteristics analysis of the planar distribution of sedimentary microfacies all of them are used to study the sedimentary system.Established the sequence stratigraphic framework of objective interval for Putaohua oil layer in the study area,and divided into eight six levels of sequence,they are identified as eight super short term cycle P?8,P?7,P?6,P?5,P?4,P?3,P?2 and P?1 from bottom to top respectively,namely P?reservoir group.The sequence division is based on the principle of first determining the three-level sequence boundary,then dividing the sequence into four,five and six levels successively.On the base of determining the sequence(SQ3 ?)boundary,divided into a four level sequence(SQ4 ?,namely P? oil group)and three grade 5 sequence(SQ5 ?,SQ5 ? and SQ5 ?,namely below,middle and up P?sandstone groups,)in the sequence interface,finally divided into six levels of sequence.So the purpose oil layers group of putaohua reservoir in the study area has realized the stratigraphic classification of high resolution sequence,revealed the sand body distribution law of reservoir group,established the typical core facies marks of sedimentary microfacies and logging facies model which is considered as the delta front deposition,distributary channel sand that possess good property and connectivity is considered as the framework sand body of target oil layer.The reservoir characteristics are studied by seismic inversion of the sand body distribution,combining with reservoir physical characteristics,reservoir pore permeability distribution characteristics and reservoir heterogeneity.This study takes the structure,sedimentary micro facies,carbonate content and characteristic distribution of reservoir property and other geological factors as the main reference,pore combination characteristics as the auxiliary factors,to make the classification of the reservoir evaluation and prediction of favorable area,through comprehensive research results to suggest the location.