Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (1): 41-51.doi: 10.13278/j.cnki.jjuese.20180289

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Research and Modeling of Interlayers in Distal Sandy Braided River Reservoir: A Case Study of Upper Guantao Formation, Block 6 in Gudong Oilfield, Zhanhua Sag

Qiao Yupeng1, Qiu Longwei1, Song Ziyi2, Wang Jun3, Song Fan1, Liu Wei3   

  1. 1. School of Geoscience, China University of Petroleum, Qingdao 266580, Shandong, China;
    2. CNOOC Research Institute Ltd., Beijing 100028, China;
    3. Research Institute of Exploration&Development, SINOPEC Shengli Oilfield Company, Dongying 257000, Shandong, China
  • Received:2018-11-21 Published:2020-02-11
  • Supported by:
    Supported by National Science and Technology Major Project(2017ZX05009-002)

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Abstract: The study on interlayers in fluvial reservoir plays an important guiding role in the reservoir architecture characterization and remaining oil development. Taking the block 6 of Gudong oilfield in Zhanhua sag as an example, the single well, profile,and plane characteristics of the distal braided river were analyzed by using core and wire logging. In order to analyze the interlayer patterns in the braided fluvial reservoirs, the interlayer characteristics in different hierarchical structures were identified by control of the microfacies and calibration of the well and core. The interlayer between single layers is physical, the interlayer between single sand bodies is physical or boulder clay, and the interlayer between the accretion bodies is silty mudstone. The silty interlayer in the braided bar is 80-400 m wide and 350-1 630 m long, and its inclinations at the bar head is about 2.03°, at the bar tail is about 1.28°, and at the wings is about 1.58°. Based on the constraints of the well network, the geometric parameters and occurrences of the interlayers in the braid bar were characterized, and the architectural model was built by the method of interface constraint, which can further characterize the heterogeneity of braided fluvial reservoir.

Key words: distal sandy braided river, interlayer, architecture, Gudong Oilfield

CLC Number: 

  • P681.13
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