【作者】 李海鹏；

【导师】 杨宝俊；

【作者基本信息】 吉林大学 ， 固体地球物理学， 2007， 硕士

【摘要】 本文对盆地正反转构造进行综合分析。本文对松辽盆地一些地震勘探剖面上表现的典型反转构造进行了定量分析,生长指数表明,红岗、孤店、宋站等在反转的伸展和挤压的时间上较为一致,速率因地层、地点而变;地层断距指出,红岗、孤店参考单元底为较小的逆断距,断距的变化可能从逆到正再回到逆,其间越过两个零点,宋站参考单元底的断距负向近似为零,说明同伸展期地层单元的断距向上逐渐减小,只是不很明显;三地反转率由大到小依次为:宋站、孤店、红岗,反映了三地反转大小情况;位移-距离分析直观反映反转率中使用参数情况,增进对反转情况的了解。同时,本文从断层、褶皱、构造特点、背斜、偏移带等多方面对松辽盆地地震剖面上表现的花状构造进行解释。另外,本文通过建立典型反转构造地层模型,利用回剥技术恢复各时期沉积地层的厚度,进而得到总沉降量和构造沉降,模拟恢复地层沉降史;采用镜质体反射率为基础的方法,模拟地层热史;通过典型模型的数值模拟,进而探讨松辽盆地反转构造的沉降史、热史。更多还原

【Abstract】 This paper makes a quantitative analysis of some typical inversion structures which appear on the seismic prospecting sections in Songliao Basin.Growth index indicates that Honggang, Gudian, Songzhan are coincident on the extension of inversion and the time of extrusion; and the speed varies with the stratum and place.Stratigraphic separation points out that Honggang,Gudian’s basal reference units have small amounts of reverse separations, which may change from reverse to normal and back to reverse through the null point two times; while Songzhan’s separation of the basal reference unit is close to zero on the negative direction,and it shows that fault separation of synextensional units decreases gradually upwards,though not very distinctly.The three places have different inversion conditions respectively,and Songzhan is with the highest inversion rate,Gudian middle and Honggang smallest.The analysis of displacement-distance reflects distinctly the conditions of using parameters in inversion rate,which supplies further information to understand the inversion conditions.Otherwise,this paper interprets the flower structures,emerging on the seismic prospecting section in Songliao Basin, from various aspects, such as the fault, drape, structure features, anticline, excursion belt etc. Through framing inversion structure basin stratigraphic sedimentary formation model,this thesis uses backstripping restoring each time’s thickness of sedimentary formation,then obtains total settlements and tectonic descents,plots sedimentation history chart,simulated restores inversion structure strata sedimentation history and carries on analyses. Adopting means of vitrinite reflectance,this thesis simulates basin thermal history and carries out analyses. Through the medium of type model numerical simulation,this thesis approaches the sedimentation history and thermal history of songliao basin inversion tectonic .更多还原