南海海域碳酸盐岩底水油藏开发生产特征研究

Study on the development and production characteristic of carbonate bottom water reservoirs in the South China Sea

海上缝洞性碳酸盐岩底水油藏储层连通性复杂,油井见水后快速水淹,采出程度低,开发效果差。南海西部海域已开发碳酸盐岩油藏少,开发经验欠缺,无可借鉴。本文根据目标油田地质油藏生产动态资料,总结不同类型生产井的含水上升规律、生产动态特征,明确储层连通性,并结合油藏数值模拟研究,确定剩余油潜力区。研究成果对海域同类底水油藏的合理开发和潜力挖潜具有指导意义。

The connectivity of the bottom water reservoirs in the fractured and vuggy carbonate rocks on the sea is complex,the oil wells are flooded rapidly after water breakthrough,the recovery degree is low,and the development effect is poor. There are few developed carbonate reservoirs in the western part of the South China Sea,and the development experience is lacking,which can not be used for reference. According to the production performance data of geological reservoirs in the target oilfield,this paper summarizes the water cut rise law and production performance characteristics of different types of production wells,clarifies the reservoir connectivity,and determines the remaining oil potential area in combination with reservoir numerical simulation research. The research results have guiding significance for the rational development and potential tapping of similar bottom water reservoirs in the sea area.