Substantiation of development systems and their technological parameters in the conditions of production of hard-to-recover reserves of oil-gas-condensate field

UDK: 622.276.34
DOI: 10.24887/0028-2448-2021-12-39-43
Key words: horizontal wells, the optimal length of the horizontal section, the density of the grid of wells, the main parameters of development
Authors: M.M. Khasanov (Gazprom Neft PJSC, RF, Saint-Petersburg; Saint-Petersburg Mining University, RF, Saint-Petersburg), A.M. Shagiakhmetov (Saint-Petersburg Mining University, RF, Saint-Petersburg), D.E. Osadchy (Saint-Petersburg Mining University, RF, Saint-Petersburg; Gazpromneft STC LLC, RF, Saint-Petersburg), V.A. Smirnov (Saint-Petersburg Mining University, RF, Saint-Petersburg)

Nowadays more than half of production drilling is related to horizontal wells, development systems based on the use of horizontal, multi-hole and branched wells are designed and applied at new discovered fields in most cases. For now, there are no generally accepted methods for selecting the optimal system, as well as the existing development tools require the use of expensive specialized software, large computing capacities and a high degree of exploration of the deposit. However, the last-mentioned condition cannot be fulfilled in the case of designing the development of a new poorly studied field or deposit, when it is necessary to assess the prospects for the development of an object based on available data and make a decision on further exploration of the object. Therefore, it is necessary to create a unified methodology that allows you to assess the prospects of development without additional time and resources.

The article describes this technique, identifies the advantages and disadvantages of its application, presents the criteria of applicability and the basic rules for the use of horizontal wells, as well as the main systems of field development using horizontal wells with the most effective conditions for their use. The article describes this technique, pros and cons of using this technique, the criteria of applicability and the basic rules for the use of wells with horizontal end, as well as the main systems of field development using horizontal wells with the most effective conditions for their use. The article shows the procedure for determining the optimal parameters of the grid of horizontal wells, the density of the grid of wells, the length of the horizontal end. Moreover, the main parameters of the development are calculated in this article and based on the modification of the Buckley – Leverett method with consideration of the horizontal end of the well. To assess the convergence of the method and confirm the theoretical research, a simulation of the development element with the considered parameters was carried out in the Tempest software package.

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