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Geoscience ›› 2008, Vol. 22 ›› Issue (2): 247-254.

• Engineering Geology and Environmental Geology • Previous Articles     Next Articles

Play Analysis and Profitable Exploration Area Evaluation of Lower Sandstone Section of Silurian in Tarim Basin

ZENG Qing-bo1,2,FAN Tai-liang1,2 ,LIU Cong1,LI De-quan3,QU Ying-jie1   

  1. 1School of Energy Resources, China University of Geosciences, Beijing100083, China;2Key Laboratory of Marine Reservoir Evolution
     and Hydrocarbon Enrichment  Mechanism of Ministry of Education,China University of Geosciences, Beijing100083,China; 3Changqing Bureau of Petroleum Exploration, CNPC, Xi'an, Shaanxi710021, China
  • Received:2007-07-16 Revised:2007-10-15 Online:2008-02-20 Published:2008-02-20

Abstract:

The long exploration history has proved that Silurian system of Tarim Basin, with good reservoirseal grouping and affluent oil and gas sources, provides a  bright prospect for future exploration. Guided by the theory of play and combined with the exploration practice of Tarim Basin, the lower sandstone section of Silurian is divided into three plays, which include Tazhong, Tadong and Tahe areas. The marginal probability method is also introduced into the comprehensive analysis on the secondary plays in each play. The results show that the values of marginal probabilities of the secondary plays in Tazhong area where the reservoirseal grouping and the traps are well developed, are high enough to be ranked as the Ⅰ—Ⅱ level area of profitable exploration. As for Tadong and Tahe areas, the traps developed well, but the conditions of reservoirseal grouping are not good,and the marginal probabilities of the secondary plays are relatively low, so the secondary plays can be classified as the Ⅱ—Ⅲ level profitable exploration area.

Key words: Tarim Basin, lower sand section of Silurian, play, marginal probability

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