塔西南地区二叠系剥蚀厚度恢复
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摘要
在同一构造层内 ,地层的沉积具有继承性和持续性 ,根据这一特点 ,可依据保存完整的上覆层厚度与下伏层厚度比值乘以下伏层厚度来估算上覆层剥蚀厚度。由于该方法以地震资料为依据 ,只需要厚度资料 ,因而控制点多 ,可信度高 ,并且与盆地的构造运动次数和升降幅度无关。同时结合声法时差法、未被剥蚀地层厚度趋势延伸法 ,可对多期构造层叠置的变形沉积盆地中的地层剥蚀厚度进行合理的恢复。这种综合分析方法在塔里木盆地西南地区二叠系中的应用 ,成功地解决了该区剥蚀厚度恢复问题 ,并显示出良好的应用前景
Within one and the same structural layer,the sedimentation is of a succession and continuity. According to such a property,the upper denuded formation thickness may be estimated in light of well preserved upper formation thickness to lower formation thickness ratio multiplied the lower formation thickness. The method is mainly relied on the seismic thickness data,therefore many control points with high creditability may be obtained and it has nothing to do with the frequence and up and down range of tectonic movement in the basin. The denuded formation thickness in the deformed sedimentary basin with multiphase structural layer superposition may be reasonably restored in combination with sonic transit time method and non denuded formation thickness trend extention method. The denuded thicknesses of Permian in the southwest part of Talimu Basin were successfully restored by use of such a comprehensive analysis method. Therefore it shows a vast range of prospects for application.
Within one and the same structural layer,the sedimentation is of a succession and continuity. According to such a property,the upper denuded formation thickness may be estimated in light of well preserved upper formation thickness to lower formation thickness ratio multiplied the lower formation thickness. The method is mainly relied on the seismic thickness data,therefore many control points with high creditability may be obtained and it has nothing to do with the frequence and up and down range of tectonic movement in the basin. The denuded formation thickness in the deformed sedimentary basin with multiphase structural layer superposition may be reasonably restored in combination with sonic transit time method and non denuded formation thickness trend extention method. The denuded thicknesses of Permian in the southwest part of Talimu Basin were successfully restored by use of such a comprehensive analysis method. Therefore it shows a vast range of prospects for application.
引文
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2 真柄钦次著 ,陈荷立等译 .压实与流体运移 .北京 :石油工业出版社 ,1981
3 GuidishTMetal.Basinevaluationusingburialhistorycal cuationsanoverview .AAPG ,1985 ;6 9(1) :92～ 10 5
4 马立祥 .利用砂岩孔隙度演化趋势估计古地层剥蚀量的简易方法 .石油实验地质 ,1991;(3)
5 牟中海 .柴达木盆地北缘侏罗系剥蚀厚度恢复 .石油勘探与开发 ,2 0 0 0 ;2 7(1)
2 真柄钦次著 ,陈荷立等译 .压实与流体运移 .北京 :石油工业出版社 ,1981
3 GuidishTMetal.Basinevaluationusingburialhistorycal cuationsanoverview .AAPG ,1985 ;6 9(1) :92～ 10 5
4 马立祥 .利用砂岩孔隙度演化趋势估计古地层剥蚀量的简易方法 .石油实验地质 ,1991;(3)
5 牟中海 .柴达木盆地北缘侏罗系剥蚀厚度恢复 .石油勘探与开发 ,2 0 0 0 ;2 7(1)
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