摘要
为深入了解应力敏感对中深层油藏单井产能的影响,通过室内实验研究有效覆压对渗透率和油水相渗曲线的影响,根据实验结果建立储层应力敏感定量表征式及应力敏感影响下的单相产能方程;根据油水两相渗流理论,进一步建立考虑应力敏感对油水相渗曲线影响的产能方程。实验与理论研究表明,应力敏感对渗透率、油水相渗曲线影响较大,进而导致油井产能降低。为应对应力敏感对中深层油藏开发的负面影响,提出单井酸化压裂,逐步恢复油田注采比以及超前注水等策略提升油田开发水平。研究结果可有效指导KLA油田开发策略、相关措施及恢复油田地层压力方案的制定,并对后续类似中深层油藏的开发有重要指导意义。
In order to understand the effect of stress sensitivity on the productivity of a single well in a medium-deep reservoir,first,the influence of effective overpressure on permeability and oil-water phase permeability curves were studied through laboratory experiments,and the effects of stress sensitivity on permeability were quantitatively characterized based on the experimental results.According to the theory of oil-water two-phase seepage flow,a productivity equation considering the influence of stress sensitivity on the oil-water phase seepage curve is further established.Experimental and theoretical studies have shown that stress sensitivity has a greater impact on permeability and oil-water phase permeability curves,resulting in lower oil well productivity.To address the negative impact of stress sensitivity on the development of medium-deep reservoirs,strategies such as acidic fracturing for single wells,gradual recovery of oil field injection and production ratio and water injection in advance were proposed to upgrade the oil field development step by step.The research results serve as an effective guide for the development of KLA oil field development strategies,while propose related methods and schemes to restore oil field formation pressure,which is of guiding significance for the subsequent development of medium-deep reservoirs of the same nature.
作者
阳晓燕
王龙
宫平志
杨贯虹
崔龙涛
YANG Xiaoyan;WANG Long;GONG Pingzhi;YANG Guanhong;CUI Longtao(Bohai Oilfield Research Institute,CNOOC(China)Tianjin Branch,Tianjin,300459,China)
出处
《天然气与石油》
2021年第4期59-64,共6页
Natural Gas and Oil
基金
“十三五”国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058)。
关键词
中深层油藏
应力敏感
产能
油水两相
实验研究
Medium-deep reservoirs
Stress sensitivity
Productivity
Oil-water two-phase
Experimental research
