摘要
密度反演会存在一定的误差,但密度参数的误差对含气饱和度的影响到底有多大,该类讨论,在国内文献上少有看到。在番禺某区识别高含气饱和度流体时,通过叠前密度反演技术对研究区进行反演,统计了密度参数的平均误差。根据反演误差与含气饱和度的线性关系式,定量计算出了密度反演误差所造成的含气饱和度误差。结果表明,0.05g/cm3的密度误差,可以导致18%的含气饱和度误差;反演误差在反演过程中是不可避免的,通过研究反演误差估算对含气饱和度的影响,对于降低勘探和开发的风险具有一定的意义;讨论的方法为有效利用误差信息提供了一个可以借鉴的方法。
There exists certain error in the density inversion,but how big the error of the density parameter influences gas saturation is seldom discussed in our academic literatures.In one of PanYu districts,when recognizing high gas saturation fluid,the inversion is made through the pre-stack density inversion technique and calculates the average error of the density parameters.According to the linear relationship between the inversion error and gas saturation,the gas saturation error caused by the density inversion error is calculated quantitatively.The results show that 0.05g/cm3 density error can lead to 18% gas saturation error;Inversion error in the inversion process is inevitable.By studying the influence of inversion error estimate on gas saturation,it has the significance of reducing the risk of exploration and development.So the method discussed in this paper provides a reference for using error information effectively.
出处
《工程地球物理学报》
2011年第3期257-260,共4页
Chinese Journal of Engineering Geophysics
基金
国家科技重大专项
海洋深水区油气勘探关键技术(编号:2008ZX05025-03A)资助
关键词
叠前密度反演
误差
含气饱和度
流体替换
pre-stack density inversion
error
gas saturation
fluid replacement
