Determining technological properties of drilling muds

Koroviaka, Ye. A; Mekshun, M. R; Ihnatov, A. O; Ratov, Boranbay; Tkachenko, Ya. S; Stavychnyi, Ye. M

doi:10.33271/nvngu/2023-2/025

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…Таким чином, з наведених відомостей стає очевидним, що застосування різноманітних хімічних речовин при спорудженні свердловин є виробничо-необхідною мірою [16]. Саме тому геолого-технічними проєктами на спорудження свердловин необхідно передбачати екологічні попереджувальні заходи, спрямовані на запобігання забруднення всіх складових навколишнього природного середовища (ґрунтів, поверхневих і підземних вод, атмосферного повітря) промивальними рідинами і хімічними реагентами (ПАР) [17].…”

Section: рис 1 схематичне зображення замкнутої схеми циркуляції проми...unclassified

Issues of improving well construction processes and their environmental component

Pavlychenko,

Ihnatov,

Askerov

2023

Coll. res. pap. nat. min. univ.

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Purpose. Consistent analysis of complex issues of technical and technological components of the well construction cycle, taking into account the need to ensure the achievement of high technical and economic indicators while simultaneously complying with restrictive standards of environmental protection and technological safety. Research methodology. Theoretical and laboratory studies of the features of the use of special process fluids were carried out using modern methods of analytical analysis and experimental research, in particular through the use of general principles of mathematical and physical modeling, methods for processing research results in EXCEL, MATHCAD, instrumentation and materials. The flow of downhole circulation processes was simulated on experimental stands at the training drilling site of the Dnipro University of Technology using a ZIF-650M drilling rig and a UKB-4P drilling rig, as well as corresponding drilling and auxiliary tools. Research results. The key issues of organizing the construction cycle of wells for various purposes are considered. The features of the use of special technological fluids at different stages of the complex process of obtaining a reliable communication channel in a mountain range with a deep deposit, in the form of a well, have been studied. The essence of individual operations during flushing, securing and cementing a wellbore is analyzed. The results of studies of the technological properties of clay washing liquids treated with special chemical reagents are presented. Specific examples of approaches to ensuring the implementation of well technological operations are highlighted. The need to comply with environmental safety standards is substantiated. Originality. According to the purpose of the research, laboratory study methods have established the existence of a correlation between the concentration of surfactants (using the example of sulfonol and ditalane) and indicators of the technological properties of drilling fluids, namely viscosity and fluid loss. These characteristics change upward or downward, corresponding to the presence or absence of a background carbon-alkaline reagent. This changes the nature of the interaction of flushing fluids with the walls of the wellbore, and its positive effect is manifested in the effect of hydrophobization and minimal impact on the environment. Practical implications. The logical and consistent study of the influence of individual components of the flushing, cementing and cementing processes on the overall performance of well construction, presented in the work, allows us to evaluate potential directions for research to improve the development cycles of mineral deposits. The processes of the technological cycle of constructing wells for various purposes and other related works are considered on the basis of ensuring compliance with environmental protection standards.

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Section: рис 1 схематичне зображення замкнутої схеми циркуляції проми...unclassified

Issues of improving well construction processes and their environmental component

Pavlychenko,

Ihnatov,

Askerov

2023

Coll. res. pap. nat. min. univ.

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“…The quality of the well and its operational characteristics are determined by a set of technological works carried out at the final stage of its construction, which includes opening the aquifer, equipping it with a filter and development [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Determination of the thermal state of a block gravel filter during its transportation along the borehole

Chudyk,

Sudakova,

Dreus

et al. 2023

Min. miner. depos.

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Purpose. Development of a methodology for determining the thermal state of block inverse gravel filters manufactured using low-temperature technology during their transportation in a well based on computer and mathematical modeling. Methods. The study of hydrodynamic processes occurring during the transportation of the filter in the borehole, as well as the calculation of thermal fields in the filter body, was performed using the Ansys Fluent software package. To determine the effective thermophysical characteristics of the filter, the approaches of the heat transfer theory in porous media were applied. To investigate the thermal conditions of the filter at heat exchange with well fluid, the use of analytical solution of the heat conduction problem in a cylindrical shell, taking into account the properties of porous dispersed water-saturated medium, is proposed. Findings. The methodology for calculating the thermal state of a gravel filter during its operation in a well has been developed. For estimation of the filter surface temperature, the expression obtained on the basis of the analytical solution of the heat conduction equation, taking into account the characteristics of the porous filter medium, is proposed. Hydrodynamic and thermal fields in the borehole and the filter body during the filter transportation process in the borehole have been obtained. Originality. For the first time, the problem of heat exchange of a gravel inversion filter, manufactured by low-temperature technology in a well is considered. The influence of hydrothermal conditions in the well on the process of filter heating during its transportation in the well is shown. The hydrodynamic fields during the flow of the drilling mud around the inverse gravel filter are determined. Practical implications. The proposed approaches and results of the study allow to determine and can be used in the development of technological regulations for the use of block gravel filters produced by low-temperature technology for the equipment of hydrogeological wells. The methodology for modelling the process of two-phase inversion transition of aggregate state of the binding agent during transportation of inverted block-type gravel filter during well construction has been developed.

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Fundamental principles and results of deep well lining

Stavychnyi,

Koroviaka,

Ihnatov

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

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The review of the theory and practice of the special technological fluids application is analyzed. On the example of a specific borehole, with an actual vertical depth of 3287 m, intended for opening horizons B-17v, B-17n and project B-21, measures to clarify the filtration and capacity properties of reservoir rocks, increase production volumes are considered of hydrocarbons and accelerating the rate of selection of mining reserves. Testing in the interval 3364 - 3337.6 m of the B-21 horizon by using a set of test tools KVI-95, objectively proved that the specified object is characterized as penetrating, gas-saturated, the activity of which is reduced by contamination of the near-outbreak zone of the seam. As a method of determining clogging, a cut of the working end of the core with a length of 1 mm was applied. According to the results of the interpretation of the materials of the geophysical research of the specified borehole, it was established that the seam fluid comes from the interval 3339 - 3344 m. The paper determined that a promising way to solve the issue of high-quality cementing is the application of composite tamponage systems in combination with advanced preparation methods of borehole shaft.

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Determining technological properties of drilling muds

Cited by 7 publications

References 8 publications

Issues of improving well construction processes and their environmental component

Issues of improving well construction processes and their environmental component

Determination of the thermal state of a block gravel filter during its transportation along the borehole

Fundamental principles and results of deep well lining

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