Lithologic Reservoirs ›› 2008, Vol. 20 ›› Issue (3): 109-113.doi: 10.3969/j.issn.1673-8926.2008.03.022

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Experimental simulation for the influence of fault property and dip angle on petroleum migration and accumulation in Jiyang Depression

MA Zhongliang 1, 2, ZENG Jianhui 1, 2, ZHAO Leqiang3, WU Yue 1, 2, XU Xiaosong 1, 2, LI Dan 1, 2   

  1. 1. State Key Laboratory of PetroleumResources and Exploration, China University of Petroleum, Beijing 102249, China; 2. Basin &Reservoir Research Center, China University of Petroleum, Beijing 102249, China; 3. Geological Scientific Research Institute, Shengli Oilfield Company Ltd., Sinopec, Dongying 257051, China
  • Online:2008-09-15 Published:2008-09-15

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Abstract:

Based on the 2D simulation experiment, the influences of fault property and the change of dip angle on petroleummigration and accumulation in JiyangDepression are discussed. The results showthat: ① The capillary pressure difference between sands and faults changes with the variational fault property, so fault property affects the petroleum migration. When the fault property is poor, the capillary pressure difference is favorable for the petroleum migration.When the property is better, the capillary pressure difference is unfavorable for the migration; ② The change of dip angle causes the buoyancy in sands to change, so it takes a significant part in the petroleum migration.When there is a small dip angle, the buoyancy is favorable for the oil filling in sands, however, when the dip angle is large, the buoyancy is favorable for the oil migrating upward along the fault; ③ There is a complementarity of the fault property and dip angle for the oil migration and accumulation. The better the property is and the larger the dip angle is, the more favorable they are for the petroleum migrating in the upper sands; while the poor property and small dip angle are favorable for the petroleummigrating in all the sands.

Key words: sedimentary facies, braided river delta, turbidity deposit, Yanchang Formation, Ordos Basin

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