山地三分量资料采集技术研究的进展
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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.
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.
引文
[1] 陆基孟主编.地震勘探原理.山东东营:石油大学出版社,1993
[2] GarottaR J.Som e requirements ofPS mode acquisi-tion.ExpandedAbstracts ofSEG 71stAnnInternatMtg,2001
[3] GuevaraS E.3-C geophone orientation and wavem odes polarization.ExpandedAbstracts ofSEG 71stAnnInternatMtg,2001
[4] EciasAto.开发P-S转换波(第二部分):在裂缝性油藏中的应用.64届SEG年会论文,1994
[2] GarottaR J.Som e requirements ofPS mode acquisi-tion.ExpandedAbstracts ofSEG 71stAnnInternatMtg,2001
[3] GuevaraS E.3-C geophone orientation and wavem odes polarization.ExpandedAbstracts ofSEG 71stAnnInternatMtg,2001
[4] EciasAto.开发P-S转换波(第二部分):在裂缝性油藏中的应用.64届SEG年会论文,1994
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