Effect of Fault Stress Regime on the Mechanical Stability of Horizontal Boreholes

Moradi, Seyyed Shahab Tabatabaee; Ghasemi, M.; Nikolaev, N.I.; Lykov, Y. V.

doi:10.3997/2214-4609.201601704

Cited by 2 publications

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“…Существует множество методов и способов для блокирования водопроявляющих пластов в процессе проведения ремонтно-изоляционных работ и экспресс-ремонтов по восстановлению герметичности газоводонефтепроявляющих скважин [13][14][15]18]. Используемые технологии изоляции пластов с аномальными давлениями при бурении скважин не являются эффективными, так как предусматривают проведение дополнительных спускоподъемных операций [26].…”

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Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Dvoynikov

Kuchin

Mintzaev³

2021

PMI

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Article provides a brief overview of the complications arising during the construction of oil and gas wells in conditions of abnormally high and abnormally low formation pressures. Technological properties of the solutions used to eliminate emergency situations when drilling wells in the intervals of catastrophic absorption and influx of formation fluid have been investigated. A technology for isolating water influx in intervals of excess formation pressure has been developed. The technology is based on the use of a special device that provides control of the hydrodynamic pressure in the annular space of the well. An experiment was carried out to determine the injection time of a viscoelastic system depending on its rheology, rock properties and technological parameters of the isolation process. A mathematical model based on the use of a special device is presented. The model allows determining the penetration depth of a viscoelastic system to block water-bearing horizons to prevent interformation crossflows and water breakthrough into production wells.

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Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Dvoynikov

Kuchin

Mintzaev³

2021

PMI

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Research of the inhibitory capacity of the polymer salt drilling fluids based on xanthan gum

Verisokin

2019

Egypt. J. Chem.

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I N the drilling process, the balance of the rocks composing the walls of the wells is disturbed. The stability of the walls depends on the original strength characteristics of rocks and their changes under the influence of various factors. Therefore, drilling mud plays large role. It is known that the main role in the intensification of the process of softening clays is determined by original humidity, and the saturation of drilling mud filtrate under the action of the formation overburden. The absorption of the filtrate of drilling mud occurs not so much under the influence of pressure drop in the system well-reservoir, as a result of physical and chemical effects, growing in most clay rock. The most optimal from the point of view of stability of the borehole walls are cases where in the system the well-reservoir osmotic equilibrium is established, or osmosis is directed from the reservoir into the well.The greatest influence of the osmotic pressure exhibited when saline drilling fluids are used. This paper examines the effect of polymer salt of drilling fluids clay swelling, i.e. inhibiting the ability of drilling mud.

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Effect of Fault Stress Regime on the Mechanical Stability of Horizontal Boreholes

Cited by 2 publications

References 0 publications

Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Development of viscoelastic systems and technologies for isolating water-bearing horizons with abnormal formation pressures during oil and gas wells drilling

Research of the inhibitory capacity of the polymer salt drilling fluids based on xanthan gum

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