Optimization of the development process for complex deposits of the Tyumen suite using flow-diverging systems

Interest in the industrial exploitation of hard-to-recover reserves is growing due to the depletion of the major sources of the country's resource base. These resources are presented by long-developed and multi-layered fields. In most cases oil flow rate from wells in these fields do not exceed five tons daily. This situation affects both extraction costs and the operational performance of the deposits. Currently, under the existing technical and economic conditions, further development of these reserves is becoming unprofitable. This is due to the necessity of planning, designing, and implementing complex geological and technological measures, along with interpreting the extensive data obtained from geophysical surveys.

The aim of this study is to optimize oil extraction processes by injecting flow-diverging compositions in the development of complex and low-yield deposits in the West Siberian oil and gas province associated with the Tyumen suite.

To achieve this aim, we summarized experiences from the studied field and similar fields with comparable geological conditions. We also studied the history of operations involving flowdiverging systems in various tectonic and stratigraphic units. Additionally, we conducted a basic interpretation of geophysical study results from similar fields to identify analogues for creating isolation screens By analyzing existing geological and field data, we verified criteria to perform processing by flow-diverging compositions in the studied field.

Based on the analysis of measures for the implementation of physical and chemical methods to increase oil recovery, we defined a list of recommended basic compositions for initial implementation of this method in the geological conditions under consideration. Taking into account the geological and technological parameters of well operation, we developed a targeted program for injecting flow-diverging compositions. This program will help exploit remaining liquid hydrocarbon reserves and establish primary criteria for selecting candidate wells. We concluded that the results obtained can be replicated in similar fields to optimize the development of low-yield deposits of the Tyumen suite.

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