井口声发射井筒液油气浸入检测——三阶统计的系统辨识方法

Wellhead Acoustic Emission Oil/Gas Influx Detection——System Identification Method based on Third Order Statistics

井筒液油气浸入前后系统特性表现出极大的差异。基于三阶统计 ,本文提出一种系统辨识的井口声发射井筒液油气浸入检测方法。方法只需比较其油气浸入前后的系统特性就可实现检测 ,而且还能抑制任意高斯噪声。

Wellhole fluid system character would be quite different before and after oil/gas influx.Based on third order statistics, a novel approach,which identifies wellhole fluid system and detects the oil/gas influx with wellhead acoustic emission, is proposed.Only comparing with the change of the system impulse response before and after oil/gas influx,it may detect whether the event happens.Moreover,it can suppress arbitrary Gaussian received noise.Computer simulation confirms its availability.