摘要
上地壳的深大断裂在地下深处常常伴有几百米至几千米宽的低速带,它对油气的储集和运移或对储层的破环起着重要的控制作用。了解其三维形态、规模、倾向及物性参数(如波速和Q值等),对指导油气勘探有重要作用。断层带围陷波方法是精确确定断层几何形态和物性参数的一种有效方法。本文给出了确定断裂带内部物性参数的计算公式和步骤,开发了一套综合利用断层带围陷波和体波(P波和S波)确定断层几何形态和物性参数的软件,还给出了围陷波分析和计算的应用实例。研究及应用结果表明:通过谱分析方法,利用断层带围陷波能够初步确定断层的结构、随深度的延续特征及物性参数;借助于围陷波和体波的走时及波形资料,利用谱分析和射线追踪方法可进一步确定断层的三维几何形态和物性参数。
The deep and large faults in upper crust are often accompanied with low velocity layer stretching from several hundreds meters to several thousands meters in deep underground, which plays an important controlling role in hydrocarbon accumulation and migration or wreck of reservoir. understanding its 3-D configuration,size,dipping and physical parameters(such as wave velocity and Q value etc.)play an important role in guiding hydrocarbon exploration. The fault zone trapped waves approach is effective method for accurate determination of geometric shape and physical parameters of faults. The paper gave the computation formula and steps determining the internal physical parameters of fault zones, developed a set of software comprehensive using fault zone trapped waves and body waves(P-wave and S-wave)to determine the geometric shape and physical parameters of faults and also gave the application cases analyzing and computing trapped waves. The study and application results showed that using fault zone trapped waves could preliminarily determine the structure, continuous feature with depth and physical parameters of faults by spectrum analysis method;by the aid of travel time and waveform data of trapped waves, and body waves, and using spectrum analysis and ray-tracing method can further determine the 3-D geometric shape and physical parameters of faults.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2007年第2期164-169,共6页
Oil Geophysical Prospecting
关键词
断层带围陷波
断裂带内部结构
谱分析
物性参数
射线追踪
人机交互软件
fault zone trapped waves,fault zone interior structure, spectrum analysis, physical parameter, ray tracing, interactive software
