A method of studying target mass effects based on the Jost-Lehmann-Dyson integral representation for structure functions of the inelastic lepton-hadron scattering is elaborated. It is shown that, in accordance with general principles of local quantum field theory, expressions obtained for the physical structure functions depending on the target mass have a correct spectral property.

Within the relativistic quasipotential approach to quantum field theory, a relativistic inverse problem is considered for the superpo­sition of a non-local separable quasipotential and a local one that simulates the interaction between two relativistic spinless particles of unequal masses. Besides, the local part of total interaction is supposed to be known and that it does not admit bound states. Then a non-local separable part of total interaction can be recon­structed on the basis of the additional phase-shift and bound-state energies.

Геофизические методы исследования скважин, базирующиеся на современных физических методах исследования горных пород, используются для изучения геологического
строения недр по скважинным разрезам, выявления и оценки запасов углеводородного сырья, использования промыслово-геофизической информации при проектировании, контроле
и анализе, разработке месторождений нефти и газа и технического состояния скважин.
Целью работы является сопоставление результатов стандартного комплекса геофизических исследований скважин и результатов, полученных при интерпретации ядерно-
магнитного каротажа для получения максимально возможного объема полезной информации.

Geophysical methods of well research based on modern physical methods of rock research are used to study the geological structure of the subsoil by well sections, identify and assess hydro-carbon reserves, use field geophysical information in the design, control and analysis, development of oil and gas fields and the technical condition of wells. The purpose of the work is to compare the results of the standard logging complex and the results obtained during the interpretation of nuclear magnetic logging to obtain the maximum possible amount of useful information.