井间地震观测系统设计实例分析  

Case study of crosswell seismic geometry design

作　　者：左建军[1,2] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石油化工股份有限公司胜利油田分公司物探研究院,山东东营257022

出　　处：《石油物探》2010年第5期509-515,20,共7页Geophysical Prospecting For Petroleum

基　　金：国家高技术研究发展计划(863)项目(2007AA060500)资助

摘　　要：垦71区块低序级断层组合关系不明、剩余油分布不清、油水关系复杂、储层较薄且多,纵、横向变化大。利用井间地震技术研究了该地区的低序级断层及储层特征。首先根据实施井间地震工区的地质模型建立速度模型,依据设计的观测系统进行正演模拟,模拟的波场反映了井间地震的主要波场特征,反射波成像剖面反映了地质模型的地质特征。基于正演模拟结果对观测系统进行优化,并进行野外采集,获得的实际资料的反射波成像剖面分辨率较高,落实了井间的低序级断层及薄储层。Some problems exist in the development of Ken71 fault block, such as unclear combination relationship of low-level sequence faults,unknown distribution of remaining oil,complex oil-water relationship, thin and many reservoirs with large lateral and vertical variation.Therefore,crosswell seismic was utilized to study the characteristics of low-level sequence faults and reservoirs in the area. Firstly,velocity model was established by the geologic model of the area where crosswell seismic will be carried out.Then forward modeling was carried out by the designed geometry.The simulated wavefield reflects the main characteristics of crosswell seismic wavefield,and the imaging section of reflection wave reflects the characteristics of geologic model.The geometry was optimized based on the forward modeling results.Field acquisition was carried out and the obtained reflection imaging section of actual data has relatively high resolution.Finally,the characteristics of crosswell low-level sequence fault and thin layers have been identified.

关 键 词：地震观测系统 设计实例分析 design study 低序级断层 井间地震技术 正演模拟 地质模型建立 成像剖面 反射波 储层特征 剩余油分布 组合关系 油水关系 野外采集 速度模型 模拟结果 横向变化 地质特征 波场特征 

分 类 号：TE13[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]