黄骅坳陷大港滩海区复杂三维地震资料解释方法
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摘要
在实践中归纳出复杂三维地震资料解释方法:应用定向井轨迹方向剖面分段提取子波,斜直空间归位制作合成地震记录标定层位;根据构造应力场分析成果,确定地质结构模式为以岐口凹陷为中心的北陡南缓非对称性断裂带;分屏多线递推对比解释,查明相邻测线地质结构渐变与突变的关系;沿断面块移动,根据断层两盘地震属性的相似性确定断层规模;层拉平,确定中、新生代各时期的构造演化;相干切片,确定剖面的解释断层在平面上的组合关系;可视化显示,确定断层空间位置与交切关系等。将该方法和技术用于黄骅坳陷大港滩海区复杂三维地震资料解释,不仅发现了羊二庄断层下降盘一系列鼻状构造,而且发现及落实了12个构造圈闭,取得了较好的效果。图4参6
Intricate seismic 3D interpretation technology is used in shallow water area in Huanghua Sag, Dagang transition zone, in which a time-variable wavelet along the seismic profile of deviation borehole survey and geologic surface synthetic calibration is used based on the true track of borehole. The existence of faulted geologic structural model which is steep in north but lenitive in south around Qikou Depression is proved by the stress field analyses. The fault scale and structure evolvement is determined by using the moving-block of seismic profile along the fault slice, and seismic horizon flatten and the plain and space connection of faults is identified by using coherent slice and visualization. These technologies have been applied in this area and better results were obtained.
Intricate seismic 3D interpretation technology is used in shallow water area in Huanghua Sag, Dagang transition zone, in which a time-variable wavelet along the seismic profile of deviation borehole survey and geologic surface synthetic calibration is used based on the true track of borehole. The existence of faulted geologic structural model which is steep in north but lenitive in south around Qikou Depression is proved by the stress field analyses. The fault scale and structure evolvement is determined by using the moving-block of seismic profile along the fault slice, and seismic horizon flatten and the plain and space connection of faults is identified by using coherent slice and visualization. These technologies have been applied in this area and better results were obtained.
引文
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[2]李绍光,吴涛,等.中国石油地质志,卷四,大港油田[M].北京:石 油工业出版社,1991.
[3]佘德平,曹辉.应用三维相干技术进行精细地震解释[J].石油物 探,2000,39(2):83-88.
[4]程乾生.信号数字处理的数学原理[M].北京:石油工业出版社, 1979.
[5] 刘益强,范哲清,王梅生,等.东部深层地震勘探技术研究[R]. 天津:大港油田集团物探公司,2001.
[6]孙忠,杨梦岩,等.GeoViz三维可视化解释软件开发应用研究 [R].天津:大港油田集团物探公司,2002.
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