超深碳酸盐岩地质工程一体化堵水技术研究与应用

Research and application of integrated water shutoff technology for ultra-deep carbonate reservoir

碳酸盐岩油藏随着开采的不断推进,底水抬升影响的产量也不断上升,在现有的工艺技术下,对于抑制底水的工艺技术比较薄弱。建立一种油藏工程融合式堵水方法,通过以下三个方面改进:一是通过精细刻画油藏模型,明确剩余油位置,剖析水淹模式;二是围绕堵剂类型、堵剂用量、驻留能力、封堵强度4个方面优化堵水工艺设计;三是结合井储关系、封堵位置、堵剂成分性能等关键参数,指导施工动态调整,优化注入压力、排量、顶替量,提升堵水成功率。这三大改进不仅能提升堵水效果,同时为碳酸盐岩油藏堵水提供借鉴。

With the continuous development of exploitation of carbonate reservoir,the output affected by bottom water lifting is also increasing.Under the existing technology,the technology for restraining bottom water is relatively weak.An integrated water shutoff method of reservoir engineering is established,which is improved in the following three aspects:first,the location of remaining oil and the water flooding mode are analyzed by fine depicting the reservoir model;The second is to optimize the water plugging process design from four aspects:plugging agent type,plugging agent dosage,residence capacity and plugging strength;Third,in combination with key parameters such as well storage relationship,plugging position,plugging agent composition and performance,guide the construction dynamic adjustment,optimize the injection pressure,displacement and displacement,and improve the success rate of water plugging.These three improvements can not only improve the water shutoff effect,but also provide reference for water shutoff in carbonate reservoir.