Study On The Reservoir Architecture Of The Neogene ?-? Oil-bearing Group In The Hanging Wall Of The No. 2 Fault In Gaskule Oilfield

According to the logging,core and production data of Gasikule Oilfield N21-N1 reservoir,the text starts with fine isochronous stratigraphic contrast,sedimentary facies and some related disciplines as the theoretical basis,to carry out the research of Neogene ?-? reservoir architecture in the upper wall of Gasikule Oilfield ? fault.First,a variety of research ideas are used to divide and compare the small layers.Then,based on the previous study of sedimentary facies,and guided by the Miall's theory about reservoir architecture,the detailed study of the reservoir architecture has been completed.Finally,the results of this study are as follows:According to the characteristic of sedimentary strata in the study area,with the marker of lithology and electric property and cycle characteristics,combined with slice method and equal elevation method,according to the principle of stratigraphic correlation of the trinity of the point and the line to the surface,40 small layers of the ?-? reservoir in 440 wells of whole region are divided and contrasted.The small layer correlation work of 28 lines was completed,and the fine isochronous stratigraphic framework was established finally.Based on the full understanding of the study area of the provenance and regional sedimentary system,detailed analysis of various geological facies markers and logging facies marks in the drilling strata that it is a set of braided river delta front facies.According to lithology,electrical characteristics,it can be divided into 5 micro-facies.According to the single well facies,relative well facies and plane facies of ?-? formation,we know the whole cycle characteristics are the reverse cycle.The lacustrine transgression and lacustrine regression caused lateral and vertical sedimentary facies differentiation in the deposition process.Using the Miall's modern sedimentary outcrops and fluvial facies as configuration research theory,the configuration interface is divided into 4 levels.Futher more,this thesis has focused on the characteristics of 5 different configuration unit types and their contact relations of reservoir architecture.The spatial combination patterns can be divided into two categories:vertical overlay and transverse splicing,and each of them is divided into 6 kinds.