Analysis on the Influence Factors of Well Deviation in Gas Drilling

Shi Hui Sun; Tie Yan; Xue Liang Bi; Peng Wang

doi:10.4028/www.scientific.net/AMR.577.132

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 577Analysis on the Influence Factors of Well...

Analysis on the Influence Factors of Well Deviation in Gas Drilling

Abstract:

Well deviation control has become a bottleneck restraining the development of gas drilling. Without lubrication of drilling fluid and the existence of negative pressure differential, the reasons of well deviation in gas drilling are different from in mud drilling. The effects of stress distribution difference, rock-breaking mechanism, well bore enlargement and water export on well deviation during both gas drilling and mud drilling are compared and studied on the basis of the previous studies in this paper. The conclusion demonstrates that the new stress state of the bottom rock, the uneven crater which is formed by rock breaking and the borehole enlargement are the main causes of well deviation during gas drilling.

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Periodical:

Advanced Materials Research (Volume 577)

Pages:

132-136

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.577.132

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Online since:

October 2012

Authors:

Shi Hui Sun, Tie Yan, Xue Liang Bi, Peng Wang

Keywords:

Borehole Enlargement, Gas Drilling, Rock Breaking Mechanism, Stress Difference, Well Deviation

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