Application of a modern methodology for complex interpretation of geological and geophysical methods using neural networks in the Russian software program “PetroInfoComplex”

The article discusses the use of the Russian software program “PetroInfoComplex” by IT-ProSystems LLC used by LUKOIL-Nizhnevolzhskneft LLC to support field development and geonavigation during drilling on the Cas-pian shelf. It is noted that this software package includes a wide range of functionalities, including pre-processing and quality control of field seismic data in 2D- and 3D-formats, processing and interpretation of seismic data, as well as conducting geomechanical modeling. SP “PetroInfoComplex” can solve the problems of using seismic exploration for geonavigation in time scale without distorting amplitude-frequency characteristics. This allows in the process of geonavigation to constantly carry out any attribute analysis for any part of the seismic cube in the geonavigation project, which gives the opportunity to use always actual seismic data at the point of decision-making. In recent years, the use of neural networks for solving geological and geophysical problems has been actively implemented in software, which is a unique feature for domestic geological software that has no analogues. In particular, the use of neural networks has been tested for mapping seismoneurofacies to solve current geological support tasks based on the use of various seismic attributes (Apparent polarity, Dominant frequency, Instantaneous frequency, phase, and amplitude). The essence of using neural networks is to train them on existing standards based on the wave seismic field and the results of attribute analysis, and then use them in the process of geological support for drilling wells. Thus, the software package was successfully implemented during the drilling of horizontal wells by LUKOIL-Nizhnevolzhskneft LLC in the Caspian Sea at the developed fields, which yielded high results for the purposes of geological support.