基于光纤温度监测技术的水平井射孔段簇优化

Horizontal Well Perforation Section and Perforation Cluster Optimization Based on Fiber Optic Temperature Monitoring Technology

目前吉林油田乾安地区水平井的单井产量只能通过总产能数据得到,无法对压裂改造后射孔段、射孔簇的产能贡献做出精细评价,没有监测资料作为数据支撑,无法形成地质甜点和工程甜点相结合的储层解释评价标准。为了解决上述难题,通过在水平井中预埋光纤温度监测设备,实时监测水平井井段的温度剖面特征,对压裂后各段簇的产油量及变化情况进行有效评价,该技术可为分析各压裂段储层的产能贡献提供数据支撑。基于光纤温度监测技术原理和解释方法,利用测井参数和压裂参数(破裂压力、加砂量)进行光纤产能评价,建立测井参数和压裂参数的指数模型评价公式及产能解释图版和标准,实现了地质甜点、工程甜点的双甜点优选。在双甜点段减少射孔段长度、增加射孔簇数、缩短簇间距,实现对射孔段、射孔簇的有效优化。光纤温度监测技术在吉林油田乾安地区非常规水平井的应用表明,利用监测数据评价射孔段、射孔簇的产能贡献有利于优化水平井的压裂方案设计。

At present,the single well output of horizontal wells in Qian’an area of Jilin oilfield can only be obtained by the total production capacity data.It is impossible to make a precise evaluation of the productivity contribution of the perforation section and perforation cluster after fracturing.There is no monitoring data as data support.It is impossible to form a reservoir evaluation standard combining geological dessert and engineering dessert.In order to solve the problems,optical fiber temperature monitoring equipment is embedded in horizontal wells to monitor the temperature profile characteristics of horizontal wells in real time,and to effectively evaluate the oil production and changes of each section and cluster after fracturing.The method can provide data support for analyzing the productivity contribution of each fractured reservoir.Based on the principle and interpretation method of optical fiber temperature monitoring technology,the logging parameters and fracturing parameters(fracture pressure,sand addition)are used to evaluate the optical fiber productivity.The exponential model evaluation formula and productivity interpretation chart and standard of logging parameters and fracturing parameters are established,which realized the double optimal selection of geological dessert and engineering dessert.The effective optimization of perforation section and perforation cluster is realized by reducing the length of perforation section,increasing the number of perforation clusters and shortening the spacing of clusters.The application of optical fiber temperature monitoring technology in unconventional horizontal wells in Qian’an area of Jilin oilfield shows that,the use of monitoring data to evaluate the productivity contribution of perforation sections and perforation clusters is beneficial to optimize the design of horizontal well fracturing schemes.