The Lower Cambrian halogen-carbonate deposits are currently the most promising for the search for oil and gas objects within the Nepa-Botuba anteclise. The article describes methodical techniques for detailed well log correlation of complicated by trap magmatism log using the Yaraktinskoye field as an example. At the first stage of the research in the studied section of the well, all intervals with recorded magma definition were excluded. It was performed correlation of sections of wells treated in this way. The main features of the block structure of the studied objects before the introduction of trap intrusions are rarely revealed by the nature of the change in the thickness of the members. The effectiveness of this technique increases with the repetition of sequential paleoprofiling. When leveling to the reference boundary, it was established that the formation of the Lower Cambrian deposits in the territory of the Yaraktinskoye field is associated with the ‘keyboard’ subsidence of blocks along consedimentary faults. At the second stage, the well sections were correlated with restored intrusions. The results confirmed the presence of previously detected ruptures of infectious diseases. Based on well data only as an example, using the method of sequential paleoprofiling it was shown that the formation of the Lower Cambrian halocarbonate sequences occurred due to the subsidence of adjacent blocks along consedimentary faults. These faults subsequently became possible ways for the intrusion of trap magmatism into sedimentary rocks. It is concluded that, despite the multiplicity of samples and sampling algorithms, it is necessary to find a direction in scientific and methodological development, especially in the study of complex reservoirs.
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