DOI: 10.24411/2076-6785-2020-10119
Abstract
The article explains the nature of formation of the upper Jurassic anomalous sections of the Bazhenov formation as the result of the accumulation of precipitation upon immersion of the individual blocks in considerationem faults with subsequent widespread precipitation accumulation actually Bazhenov formation; reasons for influencing the position of the oil-water contact (OWC) in deposits of anomalous section of the Bazhenov formation; it is determined that deposits in these formations are confined to traps structural type and are controlled, to a greater extent, tectonic dislocation, and not local change in lithology.
Materials and methods
Information on more than 900 wells of the Tevlinsko-russkinsky field that opened up the studied deposits was studied using the following method: selection of the complex of the most informative well log data, stretching and compressing curves; fill in reference intervals bounded by one or two logging cased wells; sequential paleoprophylation with repeated changes in the mapping line to determine whether there are specific changes in the section between two adjacent mapping lines; grouping of wells by section types in order to identify the block structure of the studied deposits; combining correlation schemes with seismic data; the construction of structural maps of the productive strata.
Keywords
correlation of well sections, Bazhenov formation, its anomalous sections, deposits of oil
