Problems and prospects of applocation of breakears system filter cake of reservoir drilling fluids in hydrocarbon pruduction fields

Introduction. This article is a generalization of the research and field work, devoted to various aspects of the use of systems for removing filtration crusts of drilling fluids.

Purpose. The article shows the main problematic points and indicates the way to overcome them in order to maximize the technological and economic effect of the use of breaker systems in the hydrocarbon deposits. The work on this article became possible thanks to the coordinated actions of competent specialists from a number of Rosneft Oil Company subsidiaries, who managed to combine engineering approaches of world practices, as well as the Company’s own developments and methodologies.

Materials and methods. The paper considers systems for removing filtration crusts of drilling fluids of various chemical nature.

Results. Based on the conducted laboratory studies and field work, it is shown that the use of systems for removing filtration crusts of drilling fluids may not give the expected efficiency in terms of achieving the potential productivity of wells. This circumstance can be caused by various factors, ranging from the physico-chemical properties of reservoir fluids and process fluids and ending with the peculiarities of the use of filtration crusts removal technology. To maximize the effect of the use of breaker systems and eliminate uncertainties in the choice of technology, it is recommended to select process fluids for each specific development object before carrying out work, as well as to assess the readiness of the bush site for the replacement procedure from drilling mud to a breaker composition, while comparing similar technologies from different manufacturers according to unified laboratory tests fixed in the relevant regulations.

Conclusion. A key factor in achieving technological and economic efficiency will be the use of factor analysis to identify the true potential productivity of new wells for comparison with the actual indicators of new wells being put into development. At the same time, it is obvious that the use of bracket systems for horizontal wells without hydraulic fracturing is a powerful tool for approximating actual well productivity indicators to potential ones. This is possible thanks to the coordinated actions of groups of specialists from related fields: drillers, geologists and technologists. An important step towards the systematization of this process is the creation of regulations that comprehensively disclose the methodology for achieving the effectiveness of the use of breaker systems in hydrocarbon production fields.

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