Hierarchy and subsurface correlation of muddy baffles in lacustrine delta fronts: a case study in the X Oilfield, Subei Basin, China
投稿时间:2017-11-01  
英文关键词:Delta front muddy, Baffle, Genetic analysis, Hierarchy division, Strata correlation
基金项目:
作者单位
Kun Qi State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China
School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China 
Xiao-Ming Zhao State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China
School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China 
Li Liu School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China 
Yi-Qing Su School of Geoscience, Yangtze University, Wuhan 430100, Hubei, China 
Hua Wang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China 
Cheng-Peng Tan School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, Sichuan, China 
Yi-Ting Sun PetroChina Southwest Oil and Gasfield Company, Chengdu 610500, Sichuan, China 
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英文摘要:
      Muddy baffles are one of the major geological factors controlling the underground fluid flow as well as the remaining oil distribution. This study used detailed drilling data from the E1f1 reservoir in the X Oilfield, Subei Basin, China, to investigate the hierarchical muddy baffles developed on lacustrine delta fronts and their precise cross-well correlation. According to the theories on allogenic and autogenic cycles as well as the genesis and scales of muddy baffles, five orders of muddy baffles were classified, which provided various degrees of difficulty when attempting interwell correlation. Under the guidance of a reliable stratigraphic model, the precise cross-well correlation of muddy baffles could be achieved and the key point of establishment of this stratigraphic model was to calculate foreset angles of hierarchical muddy baffles during deposition. During calculation, the relationships between sediment flow direction, higher-order strata dipping direction, well types and well trajectory direction should all be taken into consideration and some other angles (referred to here as h1, h2 and h3) should also be measured. Such new methods of cross-well correlation for hierarchical muddy baffles could greatly reduce the uncertainties and multiple solutions, which in turn would be significant for efficient development and oil recovery enhancement in the reservoirs.
Kun Qi,Xiao-Ming Zhao,Li Liu,Yi-Qing Su,Hua Wang,Cheng-Peng Tan,Yi-Ting Sun,2018.Hierarchy and subsurface correlation of muddy baffles in lacustrine delta fronts: a case study in the X Oilfield, Subei Basin, China.Petroleum Science,(3):451~467.
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