The concept of application of oscillation energy in modern technologies of directional drilling

Miroslava Chernova,Yaroslav Kuntsiak,V Bondarenko,R Lysenko,I Kovalevska,M Hardygora,K Sai,F Cawood

doi:10.1051/e3sconf/202123001017

Miroslava Chernova, Yaroslav Kuntsiak + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/202123001017

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Abstract

In the process of research, there was investigated the question of influence of rotary movement of washing fluid on hydrodynamic processes with the purpose of enhancement of its transportation properties, especially in the process of drilling of horizontal wells. At present stage of science and technology development, improvement of effectiveness of drilling of horizontal wells is done at the expense of improvement of hydrodynamic circulation processes that prevent complications related to stability disturbances of well walls, formation of stagnation zones, and separation of sludge with significant reduction of energy costs. The matter of the article is related to the process of formation of stability of rotary-forward motion of washing fluid in the annulus of horizontal well directly by the energy of the flow, and also substantiation of methods of regulation of hydrodynamic parameters and flow structure with consideration of concrete geological and technical conditions.

Highlights

According to the information project “Unconventional gas in Ukraine”, most natural gases (CH4, C2H6, C3H8, CO2, N2, H2S, etc.) form hydrates that exist under certain thermobaric conditions [1]
Pre-calculating the range of oscillations generated at the bottom of the well using devices placed in the bottom of the drill string, and taking into account the rheological properties of the flushing fluid for these geological and technological conditions, which can be changed under the influence of the same generated oscillating processes:
– to increase the efficiency of cleaning the well from the drilled rock due to those physical processes and phenomena that occur under the action of fluctuations in the fluid, regardless of the depth of the well;

Summary

Introduction

According to the information project “Unconventional gas in Ukraine”, most natural gases (CH4, C2H6, C3H8, CO2, N2, H2S, etc.) form hydrates that exist under certain thermobaric conditions [1]. Based on the results of studies of the patterns of development of large-scale structures in close proximity to solid surfaces, which in our case may be the wellbore wall or drill string surface, we considered the possibility of flow control by creating periodic oscillations to effectively influence the intensity of transfer process in limited jet currents, which are mobile washing fluids in the annulus of the well [28]. Based on mathematical modeling of hydrodynamics, filtration, heat and mass transfer, using a systematic approach, the possibility of analyzing the dynamics of flow and pressure in different parts of the system is proved, which allows to determine conditions and calculate the kinetics of mass transfer and filtration processes in wells and shafts, estimating bottomhole processing energy This allows the selection of cost-effective modes during the layout of downhole equipment and the search for new technical solutions in the pulsation technology of cleaning the wellbore and bottomhole zone. The position of equilibrium or relative equilibrium in the system, which in our case causes the retention of a particle in the middle of the liquid, is described by equations in vector form, such as:

The equilibrium position is present in the case when d

Conclusions