Risk analysis of extended reach wells in the Liuhua Oilfield, South China Sea, based on comprehensive fuzzy evaluation method

被引：6
|
作者：
Zhang Hui [1 ]
Gao Deli [1 ]
Hao Zhiwei [1 ]
机构：
[1] China Univ Petr, MOE Key Lab Petr Engn, Beijing 102249, Peoples R China
来源：
PETROLEUM SCIENCE | 2009年 / 6卷 / 02期
关键词：
Extended reach well; risk analysis; comprehensive fuzzy evaluation; weight value;
D O I：
10.1007/s12182-009-0027-7
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
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.
引用
收藏
页码：172 / 175
页数：4
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