| The reservoir of Lamadian oilfield is mainly fluvial-delta deposition, with the large thickness and varieties types. The reservoir is bad heterogeneity between layers. In recent years,the data makes clear that1/3of the thickness in oil layer still has is not washed,. A lot of remaining oil is mainly distributed at the top of thick oil layer and single sand body without perfect injection and production.Therefore, in reservoir research, We find out the cause and configuration characteristics to reveal the single sand body and more accurately reflect the complicated sedimentary pattern of sand body distribution. We can further reveals the injection-production connectivity and the distribution of the remaining oil in the extra-high exploitation stage. It will provide a guidance for injection-production structure adjustment,and increase oil recovery rate.In this paper,basing on the sedimentary period in Lamadian oilfield geological activity and sedimentation data, and combining with the research results of building structure, we investigate the sedimentary facies of fluvial facies sand body characteristics and distribution rule of fluvial facies sedimentary genesis, single sandbody classification. This paper advances the "genetic analysis, contrast, orientation, level cycle the classification, tracking anatomy" river-delta of a single sand body anatomy principle, under the control of standard layer. It puts forward the method to define genetic unit, terminal channel and cause the single sand body recognition method, points out the depositional pattern feature of A SAⅡ composition.Using effective thickness distribution, permeability distribution map, each unit flooded thickness ratio and the relevant physical parameters of statistical data, it discusses the rationality of anatomy.This paper has the important instruction function for adjustment and potential tapping.It is the necessity of popularizing, and is potential economic benefits and social benefits. |
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