一个可能的河道砂体的推测

Inference of a probable river channel sandbody

中国新星石油公司石油物探研究所,南京210014

Institute of Petroleum Geophysical Prospecting, CNSPC, Nanjing 210014

在对塔里木盆地北部某工区三维地震资料进行解释时,发现了一条特强振幅异常带。文章从异常反射特征和成因两方面进行了分析,并初步推测其可能由“河道砂体”引起。同时,文章还阐述了将该异常解释为“河道砂体”存在的诸多疑点。在对强振幅异常带反射特征进行分析时,应用了先进的三维可视化解释技术,从根本上避免了平面切片分析等产生虚假异常的可能性,提高了解释的可信度。

In the interpretation of 3-D seismic data in a working area of northern Tarim Basin, an anomaly belt with very strong amplitude was found. This paper makes an analysis on it from anomaly reflection character and genesis, and infers tentatively that it may be caused by “river channel sandbody”. Several doubtful points in interpreting this anomaly as “river channel sandbody” are also discussed. When analyzing the reflection character of strong amplitude anomaly belt, we use advanced 3-D visualization interpretation technique, which prevents the probability of producing false anomaly resulted from plane slice analysis and increases the credit degree of interpretation.