Study On Heterogeneous Sand-conglomerate Reservoir With Well Logging Data

Subtle reservoirs represented by Deep Sandy Conglomerate are gradually becoming one of the key points of the Exploration and Development since the deepening of exploration extent.In the meanwhile,it also has a profound impact on accelerate the process of exploration and development and the expand of reserves of oil resources.The reservoir of the study area has the characteristics of large buried depth,complex pore structure,large lithology variation,complex rock electrical relationship,strong heterogeneity and so on.In the beginning,conventional well logging curve was restructured by using optimum segmentation methods.Then we use the minimum point of the restructured curve,seismic data and lithologic section to draw the reservoir sedimentary period in order to Study the heterogeneity together with Logging interpretation results.Research shows that the heterogeneity of the study area is from middle to high.In order to reduce the influence of heterogeneity the reservoir needs to be classified.So using well logging facies analysis,reservoir layers were divided into different rock physical phases according to its physical characteristics.,which makes the same rock facies have similar logging response characteristics.Based on Rock Physical Phase Logging parameter interpretation model was established.Using this solution,the calculation precision of reservoir parameters could be increased.The discriminant analysis of oil and water layer was based on the comprehensive characteristic parameters which reflect the characteristics of the oil layer are extracted by the principal component analysis on the basis of this method.Good results were achieved by using the method proposed in this paper.