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Reservoir classification of conglomerate reservoir base on clustering analysis method

TAN Feng-qi1,2,LI Hong-qi1,2,XU Chang-fu3,LUO Gang3,LIU Cai-feng4 (1.College of Geophysics and Information Engineering,China University of Petroleum,Beijing 102249,China; 2.State Key Laboratory of Petroleum Resource and Prospecting(China University of Petroleum,Beijing),Beijing 102249,China; 3.Research Institute of Petroleum Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China; 4.BGP Geological Research Center,Zhuozhou 072751,China)  
The conglomerate reservoir depositional environment of near source,multi-streams and rapidly changing lead to reservoir characteristics of complex and changeable lithology and serious heterogeneity et al,the fine reservoir classification has became the focus and difficult of the secondary adjustment development for this type reservoir.In this paper,the Kexia Group conglomerate reservoir of the Sixth District in Karamay Oilfield was studied and the total 12 parameters of the physical parameters,pressure mercury displacement parameters and micro-pore structure parameters of sealing core data were selected to parameter standard for reservoir classification of conglomerate reservoir,the comparative study of reservoir classification standards of 4 kinds of clustering algorithm such as Base on the Division,Base on the Level,Base on the Model and Base on the Density.The results clearly indicate that establishment clustering standards of k-means algorithm of Base on the Division the most accord with the geological characteristics of actual reservoir and classification accuracy of the reservoir,the compactness,efficiency and resolution of internal measure are all better than the other three algorithms.And through the analysis of counterpart relationships between Ⅴ kinds of reservoir and lithology found that the mechanism of conglomerate reservoir types by lithology control were very complex,the reservoir type of the same lithology may show different physical properties and filtration and the reservoir type of the different lithology may show the same physical properties and filtration,the fundamental reason above question is serious reservoir heterogeneity.Effective integration of reservoir type and Conglomerate lithology provide technical support for the design of fine development program and the quantitative evaluation of water flood layers.
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