Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (5): 28-35.doi: 10.3969/j.issn.1673-8926.2017.05.004

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Unconventional reservoir characteristics of Upper Permian Lucaogou Formation in southern margin of Junggar Basin

WANG Zhenghe, YU Qian   

  1. Chengdu Center, China Geological Survey, Chengdu 610081, China
  • Received:2017-03-13 Revised:2017-05-03 Online:2017-09-21 Published:2017-09-21

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Abstract: In order to deepen unconventional resources in Fukang-Urumqi zone,southern margin of Junggar Basin, based on field investigation,core observation,slice identification,sample testing,the unconventional reservoir characteristics of Upper Permian Lucaogou Formation were studied. The results show that unconventional reservoir was formed with tree types lithic facies,such as silt-based fine-grained sedimentary rock,clay-based finegrained sedimentary rocks and carbonates. The density of the carbonaceous fine-grained clastic rocks of upper, middle and lower member of Lucaogou Formation are 2.3-2.8 g/cm3,2.3-2.4 g/cm3,2.4-2.5 g/cm3 respectively. Their porosity is dominant with 0-2.0%,and permeability is dominant with 0-0.1mD,specific surface area is dominant with 0.1-0.5 cm2/g and 1.0-2.0 cm2/g. There is an apparent negative correlation between the density and TOC content of fine-grained clastic rock. It is considered that reservoirs space is mainly composed of nanometermicron micropores and two-phases structural fractures.

Key words: Donghe sandstone, clay minerals, pore throat radius, mechanism of waterflooding, Hadeson Oilfield

CLC Number: 

  • P618.13
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