摘要
地层埋藏史研究是借助计算机恢复地层古厚度，动态地再现盆地的沉积发育过程．本文在泥岩压实研究的基础上，首次建立了该区的压实厚度恢复模型和泥质岩声波时差与孔隙度的转换关系，恢复了旱第三纪末期地层的剥蚀厚度．利用反演法恢复了连续沉积地层和不连续沉积地层的古厚度．编绘了单井埋藏史图和沉降幅度对比图等．在此基础上动态地对比分析了研究区不同凹陷的沉积发育史，并预测了可能的生油气层段和可能油源岩的生烃、排烃时期和条件．指出了有利的油气远景区．
epositonal process can be reproduced dynamically on the basis of the restored fossil strata thickness by means of computer. The restored model of compacted thickness and the conversion formula of △t to of this area was estabilished for the first time. The erosive thickness of the strata in the end of Eogene was restored. The fossil thickness' of continuous anddiscontiouous strata was restored by reversal method. The depositional growth history of different depressions was analysed and compared dynamically on the basis of the drawn burial history diagram for single well and the diagram of deposition range comparison. The stratigraphic horizon with oil and gas and the time of generating and discharging hydrogen for the potential source rock is predicted. In the end,the best favorable area is pointed out.
出处
《西安石油学院学报》
1995年第1期14-17,25,共5页
Journal of Xi'an Petroleum Institute
关键词
泥岩压实
地层古厚度
埋藏史
ompaction of shale , fossil stratigraphical thickness,burial history
