Accurate Anatomizing Of NmⅠ Oil Group In Qinhuangdao 32-6 Oilfield

Since Qinhuangdao 32-6 oilfield begins its production in 2001,many problems has appeared.Problems are as follows.The situation of high yield of oil but also high rate of water is noticed during the developing process.The rising of this water rate is swift as well.Key reservoir underground is submerged by water seriously.Distribution of sedimentary facies and the principles of the connection among meander river sands can’t be solid foundation of the practical production process.Clear format of the sands construction is hard to be determined.Distribution of the residual oil underground is also complicated.In order to solve such problems,more meticulous and reasonable work of dividing and comparing the layers on the perspective of the static oilfield is indispensable in the Qinhuangdao 32-6 oilfield.There are differences between the first research on dividing layers and the previous work.And that is reason why many problems emerge on developing the reservoirs.New results of meander river sands researching are awaiting the researchers.The more convincing and clear sedimentary and structural pattern are inevitable.The result of meticulous dividing and comparing of the layers is the key role to every oilfield.This paper summarizes the district sedimentary background,the production data and the causes of the sands to divide and compare the layers of the Nm I oilgroup again.This work divides the Nm I oilgroup into 8 layers,which is a more meticulous and more reasonable one.On the basis of the new result,sand thickness isopach map is sketched for every single layer.The pattern of the sands distributing can be reflected by such maps.After the analysis of the logging date,the sand thickness and the evolution principle of meander river on the flat surface,5 main meander river sedimentary microfacies are summarized in the Nm I oilfield.4 typical single logs are selected for the work of sedimentary micro-facies analysis.The maps of sedimentary micro-facies of every single layers are accurately sketched.In order to show the reflection of the sands on profile,the multi-logs sands profiles are sketched.In this way can the Nm I oilgroup macro-pattern of the sedimentary system be reflected clearly.To meet the need of the late term effective developing of the high water-rate oilfield,the macro-pattern of the sedimentary body is not enough.This paper proceed to research the micro-pattern of the sands on the perspective of point-bar lateral accretion beddings with the parameters of inclination,width,depth,length etc.Collecting and summarizing the calculating results,this paper builds the knowledge base of meander river in the Nm I oilgroup in Qinhuangdao 32-6 oil field.The structural pattern is sketched on the basis of the data.All these results would be the proper reference for the following work,such as the model building and the numerical simulation.Reliable knowledge foundation and understanding for the next step on developing the oilfield meticulously are so constructed.