Research On Sedimentary Facies Of The Third Member Of Funing Formation Of The North Slope,Gaoyou Depression

In this paper,we study the formation of E1f3 in fu-ning section of the Northern Slope area of gaoyou sag.Due to the improvement of the exploration degree of gaoyou sag in recent years,the research on the sedimentary facies of this layer has been unable to meet the production needs.Therefore,it is necessary to carry out the study on the sand body microfacies.Main content of this study is to analyze the microfacies of sand body distribution,the results of the study is not only beneficial to the optimization and evaluation of exploration target,more the next step exploration and clear train of thought,at the same time also can accumulate experience through fine sedimentary microfacies study,provide reference to the research of other series of strata and the area.According to the stratigraphic correlation and reservoir research methods,this paper studies the work area of the regional strata,again looking for auxiliary sign layer,establish the well profile,and with sand group as the unit,in gaoyou sag is the three period of Northern Slope belt of mound mound formation,finely divided into 10 sand group.The results show that the stratigraphic thickness varies greatly during the three stages of fu,and the characteristics of the thickness of the east side are presented.In this paper,we study in the process,in the first place to collect,organize work area of the predecessors' research achievements,including the logging response characteristics,geological data,core data,then the rock granularity characteristics,rock characteristics,sedimentary microfacies types,such as research,and then to carry out the single well facies,the well profile phase,phase plane analysis.Research results confirmed that the scope of work area of three depositional period has a slow long fukang slope background,its sedimentary structure is a fundamental things differentiation,only in the eastern north east direction of the source,formation of north east direction into the lake delta sedimentary bodies;Spread out on the plane in the north east to southwest of the leaf,formed by sedimentary sand body microfacies types are:delta front underwater distributary channel,estuary,bay between distributary channel sand dam,frontal sheet sand.On the basis of this,this paper summarizes the sedimentary model of the delta front of the delta region in the Northern Slope of the Northern Slope.In the end,the relationship between sedimentary microfacies and oil-water distribution is analyzed,and the result is that the average daily oil production is the largest in the area of underwater distributary channel,and the bottom of the estuary is the worst.