Abstract

The present article highlights a new approach to solving objectives aimed at efficient and rational development of oil and gas fields based on conducted production logging of Kogalymneftegaz TME, LUKOIL-Western Siberia LLC horizontal wells with the application of marker-based technology Quantum PLT.

Well logging technology using markers is based on the application of quantum marker-reporters precisely indicating oil and water inflows. The placement of markers in the well implies two alternative technological solutions – application of marked proppant during MFrac or application of downhole cassettes with markers installed in the lower completion of the horizontal well. The advantages of the technology involve no necessity of well shut-in during downhole operations and the possibility to obtain an unlimited number of analytical data for a long period of time.

Marker-based technologies produced by different manufacturers differ in physical principles of operation, as well as in the methods of markers placement in the well or reservoir. The results of two alternative marker-based systems application in one well are shown in this article. This approach allowed us to compare the results and to evaluate the advantages and disadvantages of these two technologies. The well was completed by MFrac with the possibility of further ports control with the application of coiled tubing service. Each of five well intervals was equipped with two marker cassettes fixed on both sides of the MFrac port. Three months later MFrac with pumping marked proppant was performed on the well.

As a result of the world-first field application of alternative marker-based systems, valuable analytical material was obtained on the quantitative analysis of various markers, the performance of different polymers, the stability of the markers allocation in the formation fluid. The data obtained confirmed the character of the marked proppant pack washing out with the formation fluid in comparison with cassettes with markers.

Moreover, the efficiency of conducted stimulation was evaluated, specific horizontal well inflow profile types were identified, the degree of the reservoir management system impact on the inflow profile was evaluated.

It has been demonstrated, that received analytical data based on horizontal wells production logging enable addressing the issues of field digitalization at a totally new level, including:

  • visualizing recovery in hydrodynamical models;

  • control of hydrocarbon recovery, also by improving water flooding efficiency and better management of injection wells;

  • efficient planning of well intervention and stimulation techniques;

  • optimization of horizontal sections length and the number of MFrac ports;

  • adapting the relevant geological and hydrodynamic models considering analytical data related to production logging data, etc.

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