Petroleum Science >2009,??Issue 2:??172-175 DOI: https://doi.org/10.1007/s12182-009-0027-7
Risk analysis of extended reach wells in the Liuhua Oilfield, South China Sea, based on comprehensive fuzzy evaluation method Open?Access
文章信息
作者：Hui Zhang, Deli Gao & Zhiwei Hao
作者单位：
投稿时间：08 May 2009
引用方式：Zhang, H., Gao, D. & Hao, Z. Risk analysis of extended reach wells in the Liuhua Oilfield, South China Sea, based on comprehensive fuzzy evaluation method. Pet. Sci. 6, 172–175 (2009). https://doi.org/10.1007/s12182-009-0027-7
文章摘要
Drilling engineering has great uncertainty and it always involves huge investment and high risk. Risk analysis of extended reach drilling (ERD) is very important to prevent complex failures and to improve drilling efficiency. Nowadays there are few reports on how to analyze quantitatively the drilling risk for extended reach wells (ERWs). Based on the fuzzy set theory, a comprehensive fuzzy evaluation model for analyzing risks of ERD is proposed in this paper. Well B6ERW07 is a planned 8,000-meter ERW with a high ratio of horizontal displacement (HD) to vertical depth (VD) in the Liuhua Oilfield, the South China Sea, China. On the basis of the evaluation model developed in this study, the risk for drilling Well B6ERW07 was evaluated before drilling. The evaluation result shows that the success rate of drilling this well is predicted to be 51.9%, providing important rational and scientific information for the decision-makers.
关键词
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Extended reach well; risk analysis; comprehensive fuzzy evaluation; weight value