New challenges, including the wide access of Russian oil and gas companies to complex geological objects with hard-to-recover reserves, required more active use of various kinds of technological complications and innovations in oil production. First of all, this applies to the construction of horizontal and multi-barrel wells, to downhole completion systems, including methods of multistage hydraulic fracturing. To control the development of deposits and monitor the operation of such reservoir, it also required the development and implementation of new well monitoring systems. Currently, many domestic oil and gas companies use variations of stationary information and measurement systems for long-term permanent study of the phase profiles of inflow and pick-up. Among these technological solutions, the most common in Russia are: a) distributed monitoring systems based on submersible fiber optic cable sensors (with registration of thermal DTS, and sometimes optionally also acoustic DAS characteristics of the inflow), and b) point-distributed marker monitoring systems (mainly using cameras-cassettes with a marker substance in the intervals of fluid inflow from isolated stages of horizontal wells or using a marker coating injected with proppant). Both of these methods are quite competitive at first glance: both in terms of mobility and the cost of their use. However, the cornerstone point in their application is how much information on the distributed profiles of component–by-component tributaries can be trusted. Usually, in order to answer this question, oil and gas companies are forced to supplement stationary monitoring with one-time measurements of the traditional complex of methods of production logging tools (PLT). To solve this problem Gazprom Neft PJSC conducted unique comparative "blind" tests on a ground-based multiphase hydraulic stand for commercial marker monitoring systems. The main results of the tests performed are presented in the article.
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