Efficiency of Electric Logging in Thin-Layer Sections of Hydrocarbon Deposits (Gas Fields of the Precarpathian Depression)

Abstract

AbstractThe non-trivial task of searching for and diagnosing oil and gas deposits in the sections of wells represented by thin-layer deposits remains relevant. Existing traditional methods of interpreting logging data are focused on other types of sections. In thin-layer deposits, the effectiveness of logging methods is much lower. Anisotropy and the mutual influence of the characteristics of neighboring strata eliminate anomalies in geophysical curves. This leads to numerous gaps in productive formations and objects in the well sections. Thickness values for the thickness of thin single layers sufficient to determine their geophysical characteristics, and further—and reservoir properties, are not suitable for bundles or layers of thin-layer thickness of the section. Despite significant advances in the theory and practice of interpreting these electrical methods data, geophysical characteristics or logging curves in front of thin-layer intervals of well sections in most cases do not allow direct effective quantitative and qualitative geophysical and geological interpretations for individual strata. Only the integration of these geophysical methods, the use of new approaches to the interpretation of logging data can increase the effectiveness of exploratory research. The statistical approach to the creation of new synthetic parameters allows the formation of contrasting anomalies in front of gas or oil-saturated formations. The research is devoted to this and the results are presented below.KeywordsThin-layered sectionWell loggingElectrologgingGas depositElectrical resistivityInterpretation