Published September 2010
The new program of proccessing and interpretation of dual sonde pulsed neutron-neutron logging data
E. A. AleskerovOne of the primary goals of the control over mining of oil-and-gas deposits of Azerbaijan by geophysical is the estimation of a current oil saturation of collectors in sections of wells. In aim to an effective solution of the given problem has been conducted works by Scientific Research Institute of Geophysics on application of various updating pulse a neutron-neutron of logging (PNNL) in conditions of oil-and-gas deposits of Absheron and on the basis of generalization research results has been developed the dual sonde technique an estimation of a current oil saturation of complex collectors o sections of wells. Last years the given technique has been applied in research more than 200 wells and its efficiency in conditions of mineralization formation water 1050 g/l (basically) has reached up to 85 %. Principle advantage of the developed technique from existing traditional methods PNNL is the direct estimation of a current oil saturation of complex collectors on the basis of attitudes velocity of the neutron account, registration on two sonde channels at a unit delay of time in an interval td=7001000 mkm.s, without definition of neutron characteristics of bed rocks during interpretation. For an estimation of a current oil saturation of beds the graphic of correlation dependence between the attitude of velocity of the neutrons accounts on two sondes () and rock natural radio-activity (GL) is used. Coefficient of a current oil saturation of the layers located in a zone of a confidential interval of regression line accepted koc=1, and at ordinate level of reference water-bearing bed (with the maximal value ) koc=0,1. For other investigated beds coefficients koc calculated. In article are resulted some data on existing methods and soft-computing technology of data processing traditional (standard) PNNL and the developed method and sequence of carried out operations on soft-computing technology of processing and interpretation of data dual sonde technique PNNL are described and example from results of interpretation with application of the developed software package by investigation materials.
