产能递减分析新方法及应用
——以大牛地致密气藏为例

New method and application for deliverability decline analysis:Taking Daniudi tight gas reservoir as an example

杨志浩¹ 李治平¹ 陈奎² 任广磊² 赖枫鹏¹

中国地质大学（北京）非常规天然气能源地质评价与开发工程北京市重点实验室，能源学院，北京 100083 中国石化华北分公司勘探开发研究院，河南 郑州 450006

Beijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, School of Energy and Resources, China University of Geosciences, Beijing 100083, China Research Institute of Exploration and Development, Huabei Company, SINOPEC, Zhengzhou 450006, China

产能是一个生产能力参数，研究气井的产能递减规律能更好地指导气井的配产。目前还没有成熟的产能递减分析方法，特别是对于大牛地这类致密气藏。文中采用产能递减方法和一点法结合的方式，形成了一种分析致密气井产能的新方法。先根据一点法经验公式计算出无阻流量，再判断其产能递减规律确定递减类型，最终反推测试压力下无阻流量。将此方法应用于大牛地气田，得到的预测无阻流量与实际无阻流量误差小于15%；此外还介绍了这种新方法的3种应用形式，对气藏生产具有符合实际的指导意义。

Ｄeliverability is a production capacity parameter, so it is very helpful to research the deliverability to guide the proration of gas well. There is not a mature method for deliverability decline analysis, especially for tight gas reservoirs in Daniudi Gas Field. This paper uses single-point well test analysis method with deliverability decline analysis to form a new method to analyze deliverability. First, according to the single-point well test, it calculates the open-flow capacity, then determines the decline type, finally reverses thrust test pressure open-flow capacity. The result using this method to analyze Daniudi Gas Field shows that the error is below 15%. Furthermore, this paper describes three application forms of this new method.

10.6056/dkyqt201504017