【摘要】 东方1-1气田宏观和微观上非均质性严重,泥流冲沟发育,组分分布复杂,这些特征影响了开发效果,文章从气田沉积微相研究入手,精细描述了各类储层非均质性及其成因,借助地球物理新技术,提高地震资料的分辨率,从而进行单砂体雕刻,最终建立精细三维地质模型。通过对气田储层精细描述,认清了储层沉积微相与砂体成因类型、分布特征以及各类储层非均质性对天然气分布的控制作用;刻画了单砂体的展布、隔夹层分布以及泥流冲沟的边界;建立了实体三维储层非均质参数模型,对储层空间几何形态及物性空间变化进行精细描述。以此为依据,优化开发井的井别、井位、井轨迹,使气田开发在满足下游供气需求的同时,尽可能地平衡开采,提高气田采收率,为海上类似气田的合理开发提供参考。更多还原

【Abstract】 With the high heterogeneity,well-developed mudflow-gully and complicated distribution of the gas composition in DF1-1 Gas Field,the development effect was affected.Based on the study of sedimentary microfacies,this paper describes the reservoir heterogeneity and its cause.With the new geophysical techniques,data resolution can be improved greatly and the single sandbody can be characterized.Finally,a 3D fine geologic model is built.Based on precise reservoir description,we know the sedimentary microfacies,the origin and distribution of sandbodies and all kind of reservoir heterogeneity that influence the gas distribution.We also describe the single sandbody,the interlayer,and the boundary of mudflow gully.We build a 3D heterogeneity parameter model,describing reservoir geometry and the distribution of rock property in the space.Then,based on the results above,we optimize the type,location and trajectory of development well to balance reserve-production of DF1-1 Gas Field and enhance gas recovery,meanwhile satisfying the market demand.The results of this research provide references to reasonable development for similar offshore gas field.更多还原