Drilling risk analysis approach based on historical grey information of adjacent wells
1 National Engineering Research Center for Oil & Gas Drilling and Completion Technology,Yangtze University,Wuhan Hubei 430100,China
2 Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering,Yangtze University,Wuhan Hubei 430100,China
3 Engineering Technology Research Institute,PetroChina Xinjiang Oilfield Company,Karamay Xinjiang 834000,China
4 School of Petroleum Engineering,China University of petroleum,Qingdao Shandong 266580,China
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