Lithologic Reservoirs ›› 2008, Vol. 20 ›› Issue (2): 114-118.doi: 10.3969/j.issn.1673-8926.2008.02.020

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Quantitative pr ediction of fullness degr ee of lithologic trap in West Sag of Liaohe Depr ession

ZHANG Fengqi1, PANG Xiongqi2, LENG Jigao2   

  1. 1. School of Petroleum Resources, Xi’an Shiyou University, Xi’an 710065, China; 2. Research Center of Basin & Reservoir, China University of Petroleum, Beijing 102249, China
  • Online:2008-06-15 Published:2008-06-15

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Abstract:

In order to determine whether the trap is oil-bearing or not and how much is the fullness degree of lithologic trap in West Sag of Liaohe Depression, the geostatistic analysis and R-model principal factor analysis are carried out to 117 lithologic traps. The results showthat the main controlling factors of the fullness degree of lithologic trap are the distance between lithologic trap and the center of hydrocarbon expulsion, the fluid potential, the sand content of target stratum and the sand thickness. Based on the correlation analysis and multiple regression analysis, the quantitative prediction models between the fullness degree and each of the controlling factors are established. The validation results of these prediction models indicate that more than 80%predicted fullness degree values of lithologic trap are consistent to the factual values, which implies that this prediction method is practicable.

Key words: carbonate rock, fracture and cave, reservoir, production rate decline, Tahe Oilfield

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