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Geochemical Characteristics and Hydrocarbon Resource Potential of Dalong Formation Permian,Northeast Sichuan

CHEN Rui-yin,ZHU Guang-you,ZHOU Wen-bao,LI Wei,HU Guo-yi   

  1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083
  • Received:2012-08-21 Revised:2012-09-29 Online:2013-02-10 Published:2013-02-10

Abstract:

The data of rock element and organic geochemistry confirm that a set of organic rich siliceous marine formation is distributed at the top of Permian in the northeast of Sichuan basin, whose thickness is 30 meters, and the sedimentary facies belongs to platform depression.The formation had type Ⅱ organic matter feature and the mean TOC  and potential hydrocarbon ratio is 4.08% and 12.55mg/g, respectively, and the RO is 1.2%-2.0%.Thus, this formation can be cognized as excellent source sediment formation with oil yields(17.6-22.3)×104t/km2 and gas yields (1.65-1.98)×108m3/km2.Much more exploration attention should be paid to it. 

 

Key words: Dalong Formation, Siliceous rock, Element analysis, Pyrolysis, Resource potential, Northeast of Sichuan basin

CLC Number: 

  • TE122.1+13

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