基于勘探目标的观测系统设计  

Targets-based exploration geometry design

作　　者：王德志[1] 贾烈明[2] 王帮助[2] 尹军杰[1] 刘学伟[1] 

机构地区：[1]中国地质大学.武汉 [2]中石化河南石油勘探局

出　　处：《石油地球物理勘探》2006年第5期498-503,共6页Oil Geophysical Prospecting

摘　　要：为整体解剖南襄盆地的构造特征和构造发育史,在该盆地部署了三条基干大剖面。由于基干大剖面跨越不同的构造单元,地震、地质条件复杂多变,采用单一的观测系统难以完成地震勘探任务。文中基于勘探目标进行观测系统设计,充分利用盆地内局部区块现有的地质、地震资料,进行勘探目标和深、浅层地震、地质条件分析。通过对不同勘探目标的分析,建立不同的地质模型,有针对性地开展方法论证,充分考虑各构造单元之间地震、地质条件变化,把地质任务按区段细化,把深、浅层地震、地质条件进行分类统计,针对勘探目标逐线、逐段优化设计观测系统和采集参数,并处理好不同观测系统之间的衔接关系,实现了排列长度、覆盖次数的渐变过渡,取得了较好的地质效果,节约了勘探成本。In order to integrate dissection of structural feature and development history of Nanxiang basin, three backbone sections were deployed in the basin. Since the backbone sections cut across different structural units, which made seismic and geologic conditions complex and variable, using unitary geometry is difficult to fulfill seismic exploration task. The paper conducts the exploration targets-based geometry design, fully using available geologic and seismic data in local blocks of the basin to carry out analyses of geologic task and seismic and geologic conditions in deep and shallow layers. The geologic models are created by analysis of different exploration targets; purposefully developing the approaches demonstration and fully considering the variation of seismic and geologic conditions in separate structural units, decomposing geologic task according to different blocks and zones, classifying the seismic and geologic conditions in deep and shallow layers, designing geometry and acquisition parameters optimally in view of geologic task line by line and segment by segment, well dealing with joining relation between different geometry, which achieves gradual transition of spread length and folds, all these measures achieved better geologic results and reduced exploration cost.

关 键 词：勘探目标 地震、地质条件 观测系统 采集 设计 

分 类 号：P631.443[天文地球—地质矿产勘探]