萨中开发区断层区套损特点新认识与开发应用

Further Understanding about Features of Case Damage in Faulted Layer Area of Central Saertu Development Region

近年来随着薄差层开发力度加大,萨中开发区内的套损井数逐年增加。从套损区和套损层位的分布及从地质构造和地层应力的角度分析得出:套损区的规模和分布特点受断层的影响;断层区套损与断层滑动无关,是断层区压力不平衡的结果;受断层遮挡,大断距断层的两侧容易产生压力差异,对断层区地层应力场重新分布有影响,而重新分布的地层应力场产生应力集中是导致套损的直接原因。因此,在油田开发过程中应注意调节断层区的地层压力平衡,以防治断层区套损。

In recent years, with the development in thin layers and poor quality layers, number of wells with case damage in central Saertu area increased one year after another. By now, 2449 wells with case damage have been found and there are 9 regions with certain scale of case damage. According to distribution features of regions with case damage and horizons with case damage, it can be concluded that there are certain relations between case damage and fault structure. Based on existed results, this paper analyzes potential relation between case damage and geological structure in central Saertu area with respect to geologic structure and formation stress. The necessity and feasibility of injection-production adjustment for case damage control in faulted layer regions is also discussed in this paper.