Underbalanced Drilling and Its Advancements: An Overview
Parole chiave:
Underbalanced drilling, foam, formation damage, differential sticking, fluid lossAbstract
Ever increasing global energy demand associated with depletion of conventional hydrocarbon resources drives exploration and production (E&P) industry to invent advanced new technologies in frontier areas of drilling, production and reservoir engineering to enhance hydrocarbon production from unconventional resources or depleted reservoirs. Demand to produce from a low pressure marginal reservoir and the discoveries of naturally fractured reservoirs lead to the development of new drilling techniques like underbalanced drilling along with other technological advances. Underbalanced drilling (UBD) technology can overcome a number of problems encountered during drilling, which is otherwise impossible with conventional overbalanced drilling. However, in-depth understanding of the characteristic behavior of different components during operation is an essential criteria for efficient application of this technology. In drilling operation, drilling fluid plays a very important role in controlling the entire operation efficiently without any interruption or damage to the reservoir. Foam-based drilling fluid, one of the most favored techniques of UBD needs a thorough study for its applicability and smooth functioning under bottom hole condition. Foam fluid is very much unpredictable for its very sensitive rheological behavior, specifically for small variation in pressure, temperature, and composition along with other parameters during drilling. Hence, utmost care should be taken for proper designing of foam-based fluid, failing of which may negatively affect the process. Present paper deals with the developments of foam fluid as an efficient drilling fluid since its inception, composition and rheology, merits and demerits, comparison with conventional fluids which will help the researchers working in the field to get the intensive information without consulting a large literature.Keywords: Underbalanced drilling, Foam, Formation damage, Differential sticking, Fluid loss
File supplementari
Pubblicato
Fascicolo
Sezione
Licenza
Declaration and Copyright Transfer Form
(to be completed by authors)
I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.
· I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
· I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
· I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
· I/We also agree to the authorship of the article in the following order:
Author’s name
1. ________________
2. ________________
3. ________________
4. _______________
We Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal. |
