A brief overview of the historical development of inclined and horizontal well drilling is given. Based on the analysis of horizontal wells drilling in Ukraine, it was established that the success of projects for the construction of wells with a complex profile can be achieved on the basis of the construction of a detailed digital geological and hydrodynamic model of the target object, interactive geological and geophysical support of the well drilling process (geo-navigation) and the introduction of modern technological solutions in the process of drilling. It is shown how the use of a qualitatively new level of digital geological and hydrodynamic modeling of the productive horizons Б-9 and Б-10 of the Velykobubniv field, based on detailed dynamic processing and reinterpretation of seismic materials with the involvement of all available geophysical and industrial-geological information, made it possible to choose with high accuracy the optimal location of а horizontal well and conduct geological and geophysical monitoring of its drilling. Using the example of well 119Г-Velykobubnivska, the main technological stages of work for its planning, design and drilling are described. The requirements for drilling flushing fluids for drilling inclined and horizontal sections of the profile are characterized. It was established that for wells with a complex spatial architecture, the parameters of drilling flushing fluids should have the necessary structural, rheological and technical tube properties, high inhibitory and minimal filtration properties, and should also ensure the stability of the near-bore rock mass, accident-free deepening, and minimize the negative impact on the reservoir properties of productive horizons. On the basis of the system analysis, the necessity of using expanded dispersion-reinforced stabilized tamponage materials based on composite cements and specialized buffer liquids has been confirmed. The main functional criteria of the used buffer systems are characterized. A graphic interpretation of the tamponage solution research and its formulation is given. The necessity of using composite cements to ensure high-quality demarcation of horizons and reliable insulation of the occupied space was established. The implementation of the project 119 Г-Velykobubnivska was considered and the results of drilling horizontal wells in PJSC "Ukrnafta" were analyzed. The successful construction of horizontal wells confirms the effectiveness of their drilling in the conditions of deposits of Ukraine to increase hydrocarbon production
Received 10.06.2022
Revised 06.09.2022
Accepted 28.11.2022
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