Influence of sedimentary facies on reservoir quality and distribution of diagenetic features in the Funing Formation, Wanglongzhuang Oilfield, Subei Basin, Eastern China

  • Liyao Li
  • Jiuchuan WeiEmail author
  • Huiyong Yin
  • Jun Xie
  • Yusheng Ding
  • Shouqiao Shi
Original Paper


The Paleogene clastic sediments of the Funing Formation, which is characterized by slump-fan, delta-front, and beach-bar deposits, are important targets for oil and gas exploration in the Wanglongzhuang Oilfield, Subei Basin, eastern China. Three categories of reservoir quality are distinguished on the basis of petrographic and petrophysical experiments such as nuclear magnetic resonance (NMR) and mercury injection (MI). A paragenetic sequence for diagenetic evolution of each sedimentary facies has been reconstructed to determine the mechanisms for the variations in reservoir quality of the formation and the influence of the sedimentary facies on the distribution of diagenetic features in each of its members. The maturity of the organic material, textural relationships, and the distribution pattern of diagenetic minerals suggest that the study area underwent mainly mesodiagenesis. The mesodiagenesis A and mesodiagenesis B stages induced different diagenetic features in the target reservoir; the beach-bar sand of the E1f2 unit and the delta-front sand of the E1f4 unit underwent mostly only cementation; the delta-front deposits of the E1f3 unit, however, suffered more from mechanical and chemical compaction than from cementation. The loss of porosity in the fluxoturbidites of E1f4 due to compaction was just as large as the loss by cementation. The gravity-flow channel, sand-bar, and distributary-channel deposits have a higher porosity and permeability than the sand-beach and estuarine-bar deposits.


Reservoir quality Sedimentary facies Diagenesis Seepage capacity Pore texture Subei Basin Funing Formation 



The authors are grateful to Prof. A.J. (Tom) van Loon for his significant advices to improve this manuscript. The entire study has been supported by the National Natural Science Foundation of China (41372290; 41402250) and the Shandong University of Science and Technology Postgraduate’s Innovation Fund (SDKDYC170211). The authors would like to express their appreciation to the Jiangsu Oilfield Company of SINOPEC for kindly supplying the core samples and well data and for the permission to publish this study.

Supplementary material

12517_2018_3745_MOESM1_ESM.xlsx (43 kb)
ESM 1 (XLSX 42 kb)


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Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.College of Earth Science and EngineeringShandong University of Science and TechnologyQingdaoChina
  2. 2.No. 2 Oil Extraction Plants of Jiangsu Oilfield AffiliateSINOPECTianchangChina

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