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柴西南地区古近系—新近系是柴达木盆地最主要的油气勘探区和开发区,通过对54口钻井和录井资料的详细层序地层学的研究,对研究区古近系-新近系的干柴沟组—狮子沟组地层中识别出了一个初次湖泛面和六个最大湖泛面,将其划分为6个三级层序和17个准层序组,并对十条连井剖面进行了层序对比。在此基础上,对柴西南三维地震区切出了与前述的钻井连井剖面相同的连井地震剖面,并通过对地震剖面层序界限识别和划分,以及将钻井剖面上的层序划分结果投影到连井地震剖面中等方法,对钻井剖面和地震剖面的层序划分结果进行了对比和调整,使两者完全统一,建立了柴西南区古近系-新近系井—震统一的高精度层序地层格架,这为该区开展岩性油气藏勘探奠定了基础。
The Paleogene-Neogene of Qaidam Basin is the most important oil and gas exploration area and development zone in Qaidam Basin. Based on the detailed sequence stratigraphy of 54 drilling and logging data, Department of Qianchaigou - Shizigou Formation stratigraphy identified an initial lake flooding and six maximum lake flooding surface, it is divided into six third-order and 17 quasi-sequence group, Well section sequence contrast. On this basis, the same continuous well seismic section as the aforementioned drilling continuous well section is cut out for the 3D seismic area in southwestern Qaidam, and the sequence boundary of the seismic section is identified and divided, and the result of sequence division on the drilling section is projected To-well seismic section method, the result of sequence comparison between drilling section and seismic section is compared and adjusted so as to completely unify the two sequences and establish a unified high-precision layer of the Paleogene-Neogene well-seismic complex in the southwestern Qaidam basin Sequence stratigraphic framework, which lays the foundation for the exploration of lithologic reservoirs in the area.