摘要
火山岩除了岩性复杂外，储层孔隙类型和岩石结构也十分复杂。区别不同结构的火山岩对于后续的油气储层评价、裂缝发育情况估计是十分重要的。由于常规测并曲线反映矿物成分和含量的变化，关于岩石结构的信息很弱。矿物成分相同但结构不同的火山岩普遍存在，靠常规测并曲线难以识别出这种结构上的差别。
大量的理论和实践证明测并曲线具有分形特征。不同的岩性在测并曲线上具有不同的响应特征，火山碎屑岩的测并曲线通常比火山熔岩的测并曲线抖动更剧烈。本文对测并曲线进行分数维的提取，观察到火山熔岩的分数维普遍比火山碎屑岩小，并且讨论当各种参数对计算分数维的影响。
Volcanic reservoir is quite complex in pore types and rock structure besides its lithology.To distinguish volcanics of different structures is very important to the succeeding reservoir evaluation and fracture development condition.Because conventional logging curves can only response the change of mineral constituent and content,they reflect little information about rock structure.Volcanics which have the same mineral constituents but different in structures are very common.It is difficult to identify the difference in structure by conventional logging curves. Many theories and practices have proved that logging curves have fractal characteristics.Different lithologies have different response characters in well logs. Volcaniclastic rock logging curves wobble harder than volcanic lavas'.In this paper, the fractal dimension of logging curves is extracted to see that generally the fractal dimension is smaller than that of volcaniclastic rocks. It also discusses the effect of different kinds of parameters on fractal dimension calculation.
出处
《国外测井技术》
2007年第5期32-34,4,共3页
World Well Logging Technology
关键词
测井曲线
火山岩
非线性
分形
logging curves
volcanic
nonlinearity
fractal
