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乌什凹陷沉积盖层、地震反射层及构造层的研究对乌什凹陷油气勘探开发具有重要的指导意义。采用井旁速度谱拟合曲线、声波合成地震记录、VSP测井资料、结合具体井位钻井资料,以及乌什凹陷和温宿凸起的地层分布、地震反射波组特征,对该区地震反射层特征、层位关系以及构造层进行研究。研究表明:(1)该地区从三叠纪以来,地层整体上呈连续沉积,但部分地层缺失;(2)该地区地震反射层有T3、T5、T6、T8、Tg反射层及T6-T8-2反射层系;(3)将该区划分为前中生界、中生界和新生界三大构造层。
The research on sedimentary cover, seismic reflection layer and structural layer in Wushi depression has important guiding significance for oil and gas exploration and development in Wushi depression. Using well-side speed spectrum fitting curve, acoustic synthetic seismogram and VSP logging data, combined with drilling data of specific wells, stratigraphic distribution of Wushu sag and Wensu salient, seismic reflection wave group characteristics, seismic reflection Layer features, stratigraphic relationships and tectonic layers. The results show that: (1) Since the Triassic period, the strata have been continuously deposited as a whole, but some strata are missing. (2) There are T3, T5, T6, T8, Tg reflector and T6-T8 -2 reflection layer system; (3) The area is divided into three pre-Mesozoic Mesozoic and Cenozoic strata.