多波勘探中一些物理负效应的野外补偿方法  

In-field compensation for the negative physical effects in multi-wave exploration

作　　者：曹明[1] 徐传平[1] 郑雄[1] 邓雁[1] 巫芙蓉[1] 

机构地区：[1]四川石油管理局地调处,四川成都610213

出　　处：《勘探地球物理进展》2005年第1期42-50,i002,共10页Progress in Exploration Geophysics

摘　　要：PS转换波勘探采用纵波震源,具有采集成本低及劳动强度小的特点,在识别岩性、孔隙中的流体性质以及裂缝描述等方面发挥着日益重要的作用。但在实际多分量采集设计和施工中,或多或少忽略了PS波的传播特性、反射强度、波型转换、介质吸收以及检波器组合等因素的物理负效应,特别忽略了精细的采集设计和合理的采集参数所能带给资料上的细微变化对地质解释的贡献。归纳了导致P波和PS波的传播特性和造成地震成像差异的原因,给出了在野外采集中的补偿办法,并通过实例总结出以前勘探实践中忽略的因素,得出的结论对传统的P波勘探和转换波勘探都有着重要的借鉴作用。PS converted wave exploration is playing more and more important role in fields of geophysical interpretation, such as lithology identification, pore fluid characteristics i-dentification and fractured reservoir description. However, some negative physical effects tend to be neglected in the design of layout and acquisition of multicomponent seismic data owing to lack considerations of P and PS wave propagation behaviors, reflective intensity, mode conversion, absorption and geophone array. By reviewing and analyzing existing discussions about the propagation behaviors and different imaging abilities for P- and PS-wave, this paper put forward some factors that were neglected in past exploration practice, and proposed some compensation methods during data acquisition. Traditional P and PS converted wave exploration may benefit from the results.

关 键 词：负效应 补偿方法 多波勘探 野外 物理 转换波勘探 传播特性 劳动强度 裂缝描述 流体性质 反射强度 波型转换 介质吸收 地质解释 采集参数 补偿办法 借鉴作用 PS波 成本低 多分量 检波器 设计 P波 震源 纵波 岩性 孔隙 地震 

分 类 号：P631.4[天文地球—地质矿产勘探] TP212.1[天文地球—地质学]