延长油田西部油区长6油藏开采技术政策研究

Research on the Policy of Production Technology for Chang 6 Reservoir in the West of Yanchang Oilfield

通过对延长油田西部油区典型工区长6油组的小层顶面构造特征、砂体展布特征、油层厚度分布特征、顶面构造与油层厚度、储层岩石学特征、孔隙结构特征的研究,建立了基础数据库,采用Petrel地质建模软件进行地质建模。依据分层数据、井斜数据、小层顶面构造图,建立构造三维模型。分析研究各小层的砂层展布特征及物性变化规律,在相控的基础上建立孔隙度、渗透率、饱和度三维地质属性模型;根据油藏工程方法和低渗透油田注水开发理论,结合动态监测资料,对西部油区长6油藏未注水老区进行井网适应性评价研究,确定科学合理的注水开发技术政策。

The tectonic characteristics on the top of sublayer,the characteristics of sand body distribution,the distribution of reservoir thickness,characteristics of the top structure and reservoir thickness,the reservoir lithologic property and pore structure of Chang 6 Reservoir in the west typical operation area of Yanchang Oilfield were studied.The basic database was established,ageological model was established by using Petrel geological software.Based on hierarchical data,inclined well data,top structural diagram of subayers,a 3D model was established.The rules of sand distribution and physical property variation of each layer were analyzed.A 3D geological attribute model of porosity,permeability and saturation was established based on phase control.According to the method of reservoir engineering and the theory of water injection development in low permeability oilfields,combined with dynamic monitoring data,the adaptability of well patterns without using waterflooding in the west of Chang 6 Reservoir is evaluated and scientific and rational waterfloodig development polisy is determined.