非常规油气井产量递减规律分析新模型  

A novel empirical model for rate decline analysis of oil and gas wells in unconventional reservoirs

作　　者：齐亚东[1] 王军磊[1] 庞正炼[1] 刘群明[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《中国矿业大学学报》2016年第4期772-778,共7页Journal of China University of Mining & Technology

基　　金：国家科技重大专项(2011ZX05015);中国石油天然气股份有限公司科学研究与技术开发项目(2012F-4701-03)

摘　　要：从非常规油气井生产特征出发,在综合考虑双曲递减和指数递减特点的基础上,构造了具有明确物理意义且量纲齐次的"双曲-指数"混合型递减率表达式,建立了"双曲-指数"混合型产量递减规律分析新模型并绘制了无量纲产量图版.研究结果表明:新模型可以有效地描述油气井的整个生产历史并对未来的生产趋势以及单井控制动态储量进行合理的预测和评价;与目前应用较为普遍的幂律指数递减模型相比,新模型对油气井产量曲线拟合的精度可提高8.1%.According to the hyperbolic and exponential oil and gas wells production, this paper constructed a decline characteristics of unconventional novel hybrid D-parameter（decline rate） expression which is dimensionally homogeneous and has explicit physical meaning. Based on the new D-parameter, the hyperbolic-exponential hybrid decline model was established and the dimensionless production charts were plotted. Finally, the new model was successfully applied to shale gas and tight oil, and the results show that the new model can be used to fit the whole production history for all flow regimes, and it is well-suited for the future production forecast and the estimation of the single well controlled dynamic reserve for unconventional reservoirs. The fitting precision between the new model and well production curve is 8.1% higher than the commonly-used power law exponential decline model.

关 键 词：非常规油气井 产量递减 经验方法 “双曲-指数”混合递减模型 

分 类 号：TE332[石油与天然气工程—油气田开发工程]