四扣地区高精度目标地震采集技术研究

RESEARCH OF HIGH PRECISION TARGET SEISMIC ACQUISION TECHNOLOGY IN SICOU AREA

在四扣地区 ,由于地下地质构造非常复杂 ,老观测系统炮检距分布不均 ,方位角较窄 ,覆盖次数较低 ,使义东大断裂系统及潜山构造的资料信噪比较低 ,无法进行精细的构造解释和油藏描述。为了得到该目标区域的资料 ,作者在文中提供了一种解决思路 ,即针对复杂地质构造进行精细的目标地震采集设计 ,并在野外实际生产中运用了一系列的高精度采集技术手段和措施 ,使目标区域内的资料整体水平比以往有了较大幅度的提高 ,最终可获得用于精细构造解释的地震剖面。从本次采集在该地区成功应用的实例表明 ,目标地震采集技术对于解决复杂地质构造区域资料较差的问题是一种很好的方法 ,对以后类似工区的采集具有参考价值。

S/N ratio of seismic data in Yidong huge faulting system and buried hill structure In Sicou area is very low, because of complicated geologic structure, heterogeneous distribution of offsets in old observation systems, narrow azimuth and the small fold number. As a result, it is difficult to provide accurate structure interpretation and oil deposit description using the data. The paper aimed at complicated geologic structure designs an adopting accurate target seismic acquisition and a series of high precision acquisition techniques in practical field production. Based on these , the whole level of data quality in target area can be improved largely and the seismic sections can be used in accurate structure interpretation. The fact that this method has been used successfully in the area shows that the method is efficient to solve bad data problem in complicated geologic structure area and has reference value to similar area.