The study of the near-Wellbore space.

On the surface of the earth at predetermined points at distances of 1.5–2 km from the wellhead in off-road vehicles, vibrators excite elastic waves without causing environmental damage. Vibrators can work both in hard-to-reach places and in areas with high industrial development. Elastic waves propagate in the medium, are reflected, refracted at the boundaries between different rocks, and are recorded along the wellbore with a three-component, multi-level probe for computerized equipment. Field studies take from 2 to 3 days. Processing of the materials obtained is carried out by certified software complexes UNIVERS, GEOVECTOR-PLUS, INTEGRAL-PLUS. Interpretation of the results is carried out in conjunction with the data of well logging and ground-based seismic exploration, detailed structural maps are constructed for oil prospective deposits, while the kinematic and dynamic characteristics of the oil-prospective sections of the section along longitudinal and transverse waves are calculated from time sections. Subject to the special observation system, the PM NVSP works are carried out to study rock fracturing. The high information content and resolution of the sections, together with the obtained physical and mechanical characteristics of the near-wellbore space, allows us to draw conclusions about the presence of hydrocarbons in the intervals. The timing of the results on the deep structure of the medium does not exceed one month. Express processing and delivery of preliminary results of 8-12 days. The costs of PM NVSP are repeatedly paid off by obtaining high-resolution deep images of the environment, which allow optimizing the location of design wells during exploration and exploitation of deposits. High geological and economic effect can be obtained by additional exploration of small-sized structures, when at least one deep well is present at or near the object. In large structures, in detailed studies, the development of interconnected PM NVSP profiles from different wells is carried out.

The study of the geological section using longitudinal (P) and transverse (S) waves.

Temporary sections along the NVSP profile on longitudinal (P) and transverse (S) waves and a graph of changes in the Poisson's ratio (KP) along the profile. The structural zonality (1–4) and the physicomechanical properties of the medium are naturally interconnected. Between zones (1-2-3) low-amplitude disturbances. In the most submerged zone (3), a marked increase in KP is noted, that is, a zone with increased clay content or water saturation is highlighted, a decrease in KP indicates the presence of hydrocarbons in the interval, therefore, a new oil reservoir is located in zone 4.

Prediction of the detailed structure of the Visean terrigenous sequence based on the results of pseudo-acoustic transformation of the NVSP section.