【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。更多还原

【Abstract】 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.更多还原