Oil & Gas Geology ›› 2008, Vol. 29 ›› Issue (3): 320-325.doi: 10.11743/ogg20080306

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Study of sequence stratigraphy and exploration of lithologic reservoirs in the Paleogene Middle Sha-1 Member,the Banqiao Sag of the Huanghua Depression

Shi Shige   

  1. 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China;
    2. Shengli Oilfield Company, SINOPEC, Dongying, Shandong 256604, China
  • Received:2007-11-25 Online:2008-06-24 Published:2012-01-16

Abstract:

The sublacustrine fan sandbodies developed in the deep lacustrine mudstones are the most favorable reservoirs and the main target of the lithologic reservoir exploration in Banqiao sag.The distribution of the sublacustrine fan sandbodies is so subtle and complicated due to their nature of sudden flood events that it's difficult to predict.Based on the sedimentary study on the sublacustrine fan,the author suggests that the sublacustrine fan sandbodies slump deposits of gravity flow on a fan delta front.The sublacustrine fan sandbodies occur in lenticularity vertical to the direction of the gravity flow and in imbricate arrangement parallel to the direction of the gravity flow.According to the responses of sublacustrine fan,the author predicted the distribution of the sublacustrine through seismic facies analysis and seismic attributes Abstraction,revealed that the distribution of the sublacustrine fan was controlled by the geomorphologic low and pointed out the favorable targets for lithologic reservoir exploration in Banqiao sag.

Key words: sublacustrine fan, fan delta, slump turbidite, seismic facies, palaeogeomorphology, lithologic reservoir, Banqiao Sag, Huanghua Depression

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