特高含水期扇三角洲储集层剩余油分布及挖潜途径

RESIDUAL OIL DISTRIBUTION AND THE APPROACH OF TAPPING THE LATENT POWER OF THE FAN DELTA RESERVOIR DURING THE HIGH WATER CUT STAGE

综合分析岩芯、测井、生产资料等静态和动态资料 ,并在油藏三维两相模拟的基础上 ,多层次、多角度探讨了双河油田北块 1-3 层系扇三角洲储集层油藏特高含水期剩余油分布规律、成因因素及潜力类型。研究表明 :扇三角洲储集层油藏特高含水开发期后期 ,剩余油高度分散和隐蔽 ,不同储层砂体剩余油分布、潜力、水淹模式不同 ,前缘席状砂体、河口坝砂体是进一步挖潜的对象。层内、层面及平面非均质性控制了水驱油田的开发和剩余油的分布 ,层内及层间非均质性控制了油层的水淹厚度及垂向上剩余油的分布 ,平面非均质性控制了油层的水淹面积及剩余油平面分布。在完善井网的基础上 。

This paper discusses the distribution rule of the residual oil, the genesis factor and the potential type of the fan delta reservoir in the Ⅳ 1-3 layers of the north block in the Shuanghe oil field during the high water cut stage based on the three dimension and two phase reservoir simulation and comprehensive analysis of the static and dynamic data of the rock core, log and the production data. The research shows that the residual oil is dispersed highly and concealed in the fan delta reservoir during the high water cut stage, that the distribution and the potential, the mode of water flood are dissimilar in the different reservoir sands and that the forward mat sand and rive mouth sand are the objects of tapping the latent power. The heterogeneity in a layer, interlayer and plane controls the exploitation of the water drive oil field and the distribution of the residual oil; the thickness of water flood in reservoirs and the distribution of the residual oil in vertical are controlled by the heterogeneity in a layer and interlayer; and the area of water flood and the distribution of the residual oil in a plane are controlled by the plane heterogeneity. The adjustment of the configuration of injection and extraction and the rejecting water allocation based on the perfection of the well net is the approach of tapping latent power in the fan delta reservoir during the high water cut stage.