高密度三维观测系统设计及仪器联机应用

High density 3D geometry design and the record instruments online

高密度三维采集可以帮助解决地质构造复杂地区的精细勘探问题,其中观测系统设计是一项关键技术。文章基于马厂构造的地质构造特点,设计了小道距、小炮点距、小接收线距和小激发线距的观测系统,并根据目标区实际地质构造特点,采用可变面元方式进行数据采集。高密度观测系统的特点是物理点密度较大,覆盖次数高,炮检距分布均匀。实际应用表明,采用高密度三维采集观测系统采集的资料,信噪比和分辨率较老资料有显著提高,特别是中、深层资料的信噪比得到了明显改善。通过对IMAGE SYSTEM一起的联机应用,达到了高密度采集的设备要求。

The structure of Machang oil field is very complex.The previous seismic data can not meet our need during exploration.So we do some research just for the aim above.Based on the structure characteristic of this area,we do some tests on the kinds of parameters of geometry and analyze the results.Then we designed the geometry called high density geometry with principles of small space of receivers,shot points,receiver lines and shot point lines.We use a flexible layout to do the acquisition aiming at the structure characteristic.The points of this geometry are high geophysical point's density,high folds,and good distribution of offsets.The data of forward modeling and the application show that acquisition with high density geometry can improve the signal-noise ratio and resolution of data than before,especially for the middle and deep layers.After the application of 3 IMAGE SYSTEM at the same time,we can get to the requirement of the seismic equipment.