摘要
在大庆长垣三类储层老井压裂施工过程中,压裂层数多、小层间跨度大,常规压裂工艺无法满足薄差储层压裂改造需求,导致该类油层储量无法高效开发,因此开展了薄差储层直井多层压裂工艺技术的研究。运用理论分析与结构设计,对其核心工具进行优化分析设计。通过研究突破常规坐压工艺施工段数及卡距的限制,且避免无谓节流损失。薄差储层直井多层压裂工艺达到单趟管柱可压裂15段、最小卡距1.2m的技术指标。现场试验表明,薄差储层直井多层压裂施工效率较常规压裂工艺提高3倍,有效降低了压裂操作成本,提高了薄差储层小层压开率和动用程度,为直井压裂提供了有效的技术手段。
During the fracturing operation in the old wells of tertiary reservoirs of Daqing placanticline area,due to the large number of fracturing intervals and large span among intervals,the conventional fracturing technology can’t meet the fracturing stimulation requirements of thin and poor reservoirs,resulting in the inefficient development of this kind of reservoirs.Therefore,the research on multi-stage fracturing technology for vertical wells in thin and poor reservoirs was carried out.The core tools were optimized by using theoretical analysis and structural design.Through research,the limitation of the number of fracturing stages and distance between two adjacent packers in the conventional fracturing was broken to avoid the unnecessary throttling pressure loss.At most 15 stage-fracturing can be executed in one trip with the minimum distance between two adjacent packers of 1.2m in the multi-stage fracturing technology for vertical wells in thin and poor reservoirs.The field test showed that the operation efficiency of multi-stage fracturing for vertical wells in thin and poor reservoirs was three times higher than that of conventional fracturing technology,which effectively reduced the fracturing operation cost,and improved the small layer fracturing rate and the production degree in thin and poor reservoirs.It has provided an effective technical means for the vertical well fracturing.
作者
毕泽隆
Bi Zelong(No.2 Oil Production Company of Daqing Oilfield Limited Company)
出处
《采油工程》
2022年第1期21-24,82,共5页
Oil Production Engineering
关键词
薄差储层
直井
压裂
理论分析
结构设计
坐压
thin and poor reservoir
vertical well
fracturing
theoretical analysis
structural design
fracturing without moving strings
