NDLI: Risk assessment for coal-bed methane underbalanced drilling based on triangular fuzzy numbers

Content Provider	IEEE Xplore Digital Library
Author	Qingyang Wen Xiujuan Yang Xiangzhen Yan Gensheng Li
Copyright Year	2010
Description	Author affiliation: College of Storage and Transportation and Architectural Engineering, China University of Petroleum, Dongying 257061, Shandong, China (Qingyang Wen; Xiujuan Yang; Xiangzhen Yan) \|\| State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China (Gensheng Li)
Abstract	There are many uncertainties which have the characteristics of high investment and high risk in coal-bed methane underbalanced drilling. If the potential risk and its state can be predicted in advance, the probability of risk occurrence will be reduced to the minimum extend. On the basis of risk identification of coal-bed methane underbalanced drilling, it concludes that the drilling risks mainly lie in three aspects of coal rock properties, drilling fluid properties and wellbore stability. The hierarchical structure of drilling risk factors is established. According to the disadvantages of determining factor weight by traditional analytic hierarchy process, the method of determining risk factors weight based on triangular fuzzy numbers is proposed by introducing fuzzy mathematics. The memberships of qualitative and quantitative risk factors are determined respectively. The comprehensive drilling risk evaluation model for coal-bed methane underbalanced drilling is established. This model can evaluate the drilling risk objectively and quantificationally, determine the risk values of various underbalanced drilling risk factors, and supply the theoretical basis of decreasing and avoiding risk for coal-bed methane underbalanced drilling.
Starting Page	1128
Ending Page	1132
File Size	371313
Page Count	5
File Format	PDF
ISBN	9781424459315
e-ISBN	9781424459346
DOI	10.1109/FSKD.2010.5569163
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-10
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Drilling risk assessment coal-bed methane Stability analysis membership Indexes underbalanced drilling Fluids Semantics triangular fuzzy numbers analytical hierarchy process Safety Risk management
Content Type	Text
Resource Type	Article

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