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阐述了西西伯利亚尼欧克姆组的沉积结构；证实了尼欧克姆组的楔形结构。研究结果认为，楔形体是在崩塌沉积过程中的水进水退沉积旋回中形成的一种岩体。这些楔形体可分为两种砂岩－粉砂岩的储集岩体， 它们分别与大陆架沉积和末梢沉积有关，在每一种储集体中都广泛发育着不同类型的圈闭。应当把楔状体当作特殊的地层和含油气层单元来研究。
The sedimentary structure of the Neochem Formation in West Siberian is elaborated; the wedge structure of the Neochem group is confirmed. The results show that the wedge is a kind of rock mass formed during the water inflow and sedimentation cycle in the process of collapse and deposition. These wedges can be divided into two types of sandstone-siltstone reservoir rocks, which are related to the continental shelf sedimentation and distal deposition, respectively, and different types of traps are extensively developed in each of the reservoirs. The wedge should be studied as a special formation and reservoir unit.