车西地区地震T_6反射层精细标定与解释
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摘要
车西地区下第三系沙三段下部第4套油页岩之下发育一套油泥岩“尾巴”段,可划分为3个砂层组,是地震勘探的主要目的层。利用录井剖面、电测曲线和合成记录对T6反射层进行了标定和解释,认为T6反射层标定于沙三段底部两个强相位的第一个波峰上,指出其底界不是一个岩性界面,而是一个由速度变化引起的岩石物性界面。分析了目的层段的地震反射特征,提出了改善高分辨率地震解释的方法和建议。
The sludge shale interval, which developed under the forth oil shale interval of the lower Tertiary Sha 3 Segment in Chexi area, can be divided into three sand segments. These segments are the main targets of high-resolution 3-D survey. Reflector T6 was calibrated through coring,logging curves and synthetic seismogram. It was correlated to the first peak of the two strong peaks at the bottom of Sha 3 Segment The author concluded that the bottom of the T6 was not a lithologic interface, but a petrophysical interface resulted from velocity variation. The characteristics of seismic reflection of the targets were also analyzed. Suggestions on improving the interpretation of high-resolution seismic data were presented.
The sludge shale interval, which developed under the forth oil shale interval of the lower Tertiary Sha 3 Segment in Chexi area, can be divided into three sand segments. These segments are the main targets of high-resolution 3-D survey. Reflector T6 was calibrated through coring,logging curves and synthetic seismogram. It was correlated to the first peak of the two strong peaks at the bottom of Sha 3 Segment The author concluded that the bottom of the T6 was not a lithologic interface, but a petrophysical interface resulted from velocity variation. The characteristics of seismic reflection of the targets were also analyzed. Suggestions on improving the interpretation of high-resolution seismic data were presented.
引文
1 郭栋,韩文功,杨玉龙.车西高分辨率地震资料精细层位标定方法[J].石油地球物理勘探,2001,36(5) :533～539
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3 宋传春,李来运,孙海龙,等.多井约束反演在车西洼陷薄层岩性油气藏勘探中的应用[J].勘探家,1998,3(2) :36～38
4 李庆忠.按科学程序搞好油气勘探[J].勘探家,1998,3(1) :1～4
5 胡学平,白雪莲,赵海珍,等.利用高分辨率三维地震资料预测桑塔木地区三叠系储层[J].勘探地球物理进展,2002,25(6) :36～42
6 宋国良,冯玉芬.煤田高分辨率地震勘探方法[J].勘探地球物理进展,2002,25(4) :31～34,45
2 韩文功,郭栋,赵玉华.车西地区高分辨率地震资料应用及效果[J].石油物探,2001,40(3) :61～67,75
3 宋传春,李来运,孙海龙,等.多井约束反演在车西洼陷薄层岩性油气藏勘探中的应用[J].勘探家,1998,3(2) :36～38
4 李庆忠.按科学程序搞好油气勘探[J].勘探家,1998,3(1) :1～4
5 胡学平,白雪莲,赵海珍,等.利用高分辨率三维地震资料预测桑塔木地区三叠系储层[J].勘探地球物理进展,2002,25(6) :36～42
6 宋国良,冯玉芬.煤田高分辨率地震勘探方法[J].勘探地球物理进展,2002,25(4) :31～34,45
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