Structure uncertainty analysis based on sequential Gaussian stochastic simulation
Yue Youxi1, Zeng Mian1, Wen Xue2, Liu Chenxi1, Jiang Liangguo1, Cai Junxiong1
1. School of Geosciences, China University of Petroleum(East China), Qingdao, Shandong 266580, China;
2. Shenzhen Branch, CNOOC Ltd, Guangzhou, Guangdong 510240, China
Abstract：The structure uncertainty has great impact on oil and gas exploration,reserves calculation,drilling decision,development and production.Therefore,it is very important to carry out quantitative analysis on the structure uncertainty.On the basis of the theory and methods of stochastic simulation,the stochastic velocity modeling method based on sequential Gauss simulation is studied.The multiple implementations of depth contour maps of the same probability have been obtained.According to the cumulative probability density curves of trap areas in different structure maps,the distribution characteristics and uncertainty of the trap areas have been analyzed,and the uncertainty of the target depth has been analyzed and evaluated.
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