Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (3): 100-111.doi: 10.12108/yxyqc.20180312

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Seismic response characteristics and quantitative prediction of high quality reservoirs in Jinzhou 25-1 oilfield

WANG Wei, WU Kui, HE Jing, ZHANG Jinhui, SHEN Hongtao   

  1. Bohai Oil Research Institute, Tianjin Branch of CNOOC Ltd., Tianjin 300459, China
  • Received:2017-12-21 Revised:2018-02-10 Online:2018-05-21 Published:2018-05-21

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Abstract: To find high-quality reservoirs is the key for oil and gas exploration in main oil-bearing strata of the second member of Shahejie Formation in Jinzhou 25-1 oilfield and its surrounding areas in northern Bohai Bay. The seismic response characteristic analysis, well seismic forward modeling and sensitive attribute extraction were applied to qualitatively depict the seismic response characteristics and distribution range of high quality reservoirs. The combined technique of"prestack simultaneous inversion and lithofacies fluid probability analysis" was used to obtain the probability body of sandstone reservoir in the second member of Shahejie Formation in the study area. Based on the data from 21 wells in Jinzhou 25-1 oilfield, the correlation between reservoir thickness, porosity and sandstone probability was analyzed. By setting threshold, high quality reservoir development zones with thickness greater than 50 m and porosity greater than 20% were quantitatively predicted. The research results could provide a theoretical basis for the progressive exploration and well location design of Jinzhou 25-1 oilfield and its surrounding areas. The research ideas could provide a reference for high quality reservoir prediction of the second member of Shahejie Formation in other areas of western Liaoning.

Key words: multiple-point geostatistics, training image, SNESIM method, variogram, alluvial fan, structure

CLC Number: 

  • TE122
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