Experimental investigation of gas kick effects on dynamic drilling parameters

Autor: Idris O. Sule, Faisal Khan, Stephen Butt
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Journal of Petroleum Exploration and Production Technology, Vol 9, Iss 1, Pp 605-616 (2018)
Druh dokumentu: article
ISSN: 2190-0558
2190-0566
DOI: 10.1007/s13202-018-0510-z
Popis: Abstract Blowout incidents not only lead to fatalities but also cause loss of assets, expensive clean-up, costly incident investigations and reports, and negative impact on the environment. The 2010 Macondo blowout accident in the Gulf of Mexico was an eye-opener for many oil and gas operators and oilfield service companies; thus, making early kick detection technology research one of the top industry agendas. However, only limited progress has been made in detection technologies that focus on downhole parameters due to the complexity of offshore drilling operations that is increasingly shifting towards the deepwater. Therefore, the current paper experimentally explores downhole drilling parameters for kick indication during drilling. The study utilizes a fully instrumented laboratory scale drilling rig coupled with an air injection and surface monitoring systems. This study observed a sudden jump in bottomhole pressure, increased volume of the return fluid, decreased density of the return fluid, reduced rate of penetration, and increased rotary speed as indicators of kick. The most significant new finding, which is also validated with field reports, is the dampening effects of the drilling vibrations due to kick. Frequency analysis of the axial bit–rock displacements/vibrations confirms the changes of frequencies due to kick induction during drilling. Coupling this important finding with dynamic drilling models, the response of the drilling system at surface (e.g. standpipe, choke pressures, etc.) indicating this change can be predicted.
Databáze: Directory of Open Access Journals
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