松辽盆地南部地震资料精细目标处理技术研究及应用  

Research and Application of Fine Target Processing Technique of Seismic Data in Southern Songliao Basin

作　　者：刘成权 王德安 刘喜祥 

机构地区：[1]吉林油田公司地球物理勘探研究院,吉林松原138000 [2]陕西延长石油(集团)有限责任公司研究院

出　　处：《非常规油气》2018年第1期35-42,共8页Unconventional Oil & Gas

摘　　要：针对吉林探区中浅层断裂系统发育、薄砂岩储层与泥岩交互出现、利用常规方法处理的三维地震资料难以识别的难题,以薄砂体岩性油气藏为主要目标,开展了保真、保幅处理技术,高精度宽频带处理技术,道集优化处理技术攻关。结果表明,保真、保幅处理提高了资料信噪比,补偿了非弹性介质引起的地震波振幅能量损失;高精度宽频带处理子波得到进一步压缩,频带展宽,主频提高,叠加剖面分辨率与主频明显提高,同相轴能量增强;道集优化处理可以衰减噪声、改善成像质量、改善AVO处理结果。结论为,地震资料精细目标处理技术能够有效地保留地质信息,有助于预测有效储层的平面分布规律,进而提高油气藏评价精度。In the middle and shallow layer of southern Songliao Basin,faults are well developed,thin sand body and shale is inter-bedded.Its difficult to solve this geologic problems with conventional processing technologies.In this paper,to target the lithologic reservoirs of thin sand body,three key technologies including amplitude-preserved and fidelity processing technology,high-precision wide frequency band processing technology and gather optimization processing technology have been researched.The following conclusions can be obtained from the comparing results before and after fine target process:the amplitude-preserved and fidelity processing technology enhanced the signalto-noise ratio and compensates the seismic wave energy dissipation in the viscoelastic media;the high-precision wide frequency band processing technology compressed the wavelet further and extends the bandwidth,thus improves the resolution of section obviously;the gather optimization processing technology attenuated the noise and improves the imaging precision and AVO effects.Contrasting with the old sections,the new ones by fine target processing technologies would effectively preserve the geology information,help to predict the plane distribution law of effective reservoir and then improve the evaluation precision of oil and gas reservoirs.

关 键 词：精细目标处理 地震资料 薄砂体 拓频处理 信噪比 

分 类 号：P631.425[天文地球—地质矿产勘探]