摘要
FMI成像测井给出了由电阻率像素点阵构成的图像。将此电阻率点阵通过Archie公式转换为相应的孔隙度点阵;以一个地层为一个图像窗口单元,计算每一个点阵的孔隙度对用常规测井资料确定的该地层的总孔隙度的贡献份额,并做出它沿孔隙度值的统计分布图;计算出不同m值对应的a^(1/m)值,并绘出a^(1/m)-m曲线。孔隙度分布图因储层类型的不同而不同,地层的溶蚀程度是影响a^(1/m)-m曲线形态的重要因素。这些现象给定量评价储层的缝洞孔隙发育带来了希望。
FMI outputs resitivity image composed of lattices of resitivity pixels. Convert the resistivity lattices into corresponding porosity lattices by Archie formula; set a formation as a unit of image window, calculate fractions of every porosity lattice contributing to the total porosity determined by conventional logs, then plot statistic distribution diagram of the fraction in porosity values; as well as calculate values of m√a in different m, then plot m√a-m curves. The porosity distribution diagram is various in different reservoir types, and dissolution degree of the formation is an important factor of shape of the m√a-m curves. These phenomena bring hope of quantitatively evaluating growth and development of fracture and pore.
出处
《测井技术》
CAS
CSCD
2008年第1期53-56,共4页
Well Logging Technology
关键词
FMI成像测井
碳酸盐岩
孔隙度分布
胶结指数
溶蚀程度
fullbore formation micro image （FMI）, carbonate, porosity distribution , cementation exponent, dissolution degree
