Jet drilling : master’s thesis

Razrušavanje stijena mlazom fluida je relativno nova metoda u naftnoj industriji kojom se može, posredno povećati pridobivanje ugljikovodika iz ležišta. Koristi se većinom u vertikalnim bušotinama te ležištima koja su se crpila godinama te se pridobivane količine ugljikovodika kontinuirano smanjivale tijekom godina. Za razrušavanje se koristi visokotlačni mlaz fluida s ciljem bušenja dva ili više lateralnih (horizontalnih) kanala iz vertikalnog dijela kanala bušotine. Duljine lateralnih dionica kanala bušotine izbušene mlazom fluida su različite, ovisno o samom projektu s maksimalnom duljinom od 100 m. Ovaj diplomski rad nastoji objasniti osnove razrušavanja stijena mlazom fluida, površinsku i dubinsku opremu, eksperimentalne pokuse te primjenu u praksi. U radu će biti prikazani i objašnjeni radovi koji su se izveli u Hrvatskoj na domaćim naftnim poljima, te u inozemstvu.Radial jet drilling is a relatively new drilling method in petroleum industry which indirect purpose is to increase reservoir production. It is mostly used in vertical wellbore drilling and in drilling throught depleted reservoirs which production has decreased over the years. A high-pressure jet of fluid is used to drill through the rock whit an aim of drilling two or more lateral layers from the vertical wellbore. The length of the lateral are various, depending on the project parameters with a maximal length of 100 meters. This masterʼs thesis is concentrated on explanting how radial jet drilling functions, equipment used in the process, experimental tests and application in practice. Also, in the thesis a short overview of radial jet drilling done in Croatia and in countries abroad will be given