摘要
四川盆地属于丘陵地区 ,是中国的主要含气盆地之一 ,以裂缝性气藏为主。为了查明含气层中裂缝的走向、密度和范围 ,我们持续进行了多年的三分量资料勘探方法研究。 10年内我们在川西南的同一地区做了两次三分量资料采集 ,获得的野外三分量资料质量有了明显的提高 (通过定量的信噪比评估 )。这得益于采集装备、技术及管理的进步。首先是采集设备的更新 ,新研制了实用的陆上三分量检波器 ,该检波器实现了埋置简便、与地面耦合良好、无串音的技术指标 ,接收采用了 36 0道遥测地震仪。其次是采集技术的进步 ,包括系统的采集参数设计及采集参数的优化。最终是良好的施工管理 ,细致地监视检波器耦合、水准测量、方位及震源的深度和位置 ,最大限度减小误差。
Sichuan Basin belongs to hilly area,which is one of main gas-bearing basin and mainly fractured gas reservoir.In order to find out orientation,density and scope of fracture in the gas-bearing formation,we continuously study the 3-C data exploration method for many years. We make 3-C data acquisition two times in same area of south-west of Sichuan Province within 10 years . The quality of acquired field 3-C data has been greatly improved ( after estimation of quantitative signal-to-noise ratio ),which benefit by the progress of acquisition equipment, technique and management.First is renewing the acquisition equipment:studying new-type,practical land 3-C geophone,which achieved the designing goals such as can be easily laid out,has good coupling to ground and without crosstalk,and using 360-cannel Telseis for receiving.Second is the progress of acquisition technique,including designing and optimization of acquisition parameters of system.Third is good operation management:carefully monitoring coupling of geophone to the ground,levelling survey,orientation of geophone and depth and position of shot,which reduce errors to minimum.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2003年第1期1-4,16,共5页
Oil Geophysical Prospecting
