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2013 (Vol. 5, Issue: 19)
Article Information:

Fracturing Pressure in Oil and Gas Well Drilling

Chuanliang Yan, Jingen Deng, Baohua Yu, Lianbo Hu, Zijian Chen, Hai Lin and Xiaorong Li
Corresponding Author:  Chuanliang Yan 

Key words:  Drilling, fracturing pressure, shear failure, tensile failure, wellbore stability, ,
Vol. 5 , (19): 4775-4779
Submitted Accepted Published
December 31, 2012 January 17, 2013 May 10, 2013
Abstract:

During oil and gas well drilling, when the drilling fluid density is too high, not only tensile fracturing but also shear fracturing may occur on the wellbore. The possible fracturing modes and corresponding calculation formulas of fracturing pressure were present. Moreover, the influence of the magnitude and non-uniformity of in-situ stress, the pore pressure and the formation strength on fracturing mode was quantitatively analyzed. The results showed that: the risk of shear fracturing was higher with small non-uniformity of in-situ stress; when the horizontal stress was small, shear fracturing and tensile fracturing both probably happened and a higher in-situ stress leaded to less probability of tensile fracturing; the potential of tensile fracturing increased with the increasing of formation strength and pore pressure.
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  Cite this Reference:
Chuanliang Yan, Jingen Deng, Baohua Yu, Lianbo Hu, Zijian Chen, Hai Lin and Xiaorong Li, 2013. Fracturing Pressure in Oil and Gas Well Drilling.  Research Journal of Applied Sciences, Engineering and Technology, 5(19): 4775-4779.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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