Совместная инверсия данных индукционного и электрического микрокаротажа

The inversion process is very useful stage of data processing. It consists of selection the parameters of geoelectrical model. The set of parameters must satisfy (in terms of chosen criterion) measured data. The most important role belongs to the probe's senstivity to the model parameters, e. g. for the deep induction logging the sensitivity to the formation resistivity is the highest. That is why that parameter can be defined mostly precise. At the same time one can observe some (often considerable) equivalence connected with the invaded zone parameters. To bring down this effect shallower probes can be taken into account. In this paper we attracted electric microresistivity logging data. The resistivity and thickness of mud cake along with the flushed zone resistivity form the model for micrologging. The depth of investigation of that method is about 0.2 m which guarantee precise measurements of the zone of full formation fluids displacement. Thus, to build up the model of invaded zone and formation we use joint inversion of microresistivity and deep induction logging data.