西南石油大学学报(自然科学版)

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Comprehensive Evaluation of Lower Porosity and Permeability Reservoir
in Upper Paleozoic of Daniudi Gas Field

Wang Yongjian1, Wang Yanbin2   

  1. 1. Safety Engineering College North China Institute of Science and Technology,Sanhe,Hebei 065201,China
    2. State Key Laboratory of Coal Resources and Mine Safety,China University of Mining and Technology,Haidian,Beijing 100083,China
  • Online:2013-10-20 Published:2013-10-20

Abstract:

The Shan 1–He 3 member of the Upper Paleozoic in Daniudi Gas Field is a typical lower porosity and permeability
reservoir,but the differences of reservoir properties exists in each member. This paper analyzes reservoir of the Upper Paleozoic
from the aspects of sedimentary facies,diagenesis,character of porosity and permeability,pore type and structure etc. The
result shows that the sedimentary system from Shan 1 to He 3 member changes gradually from delta facies to fluvial facies;
reservoir diagenesis is strong and the compaction damages the primary pore seriously. Compaction and dissolution from Shan
1 to He 3 member weakened. Both porosity and permeability are poor,but are increasing from Shan 1–He 3 member. Finally,
the authors set up the evaluation standards based on Sedimentary facies,diagenesis,porosity and permeability characteristics,
pore type,etc. and give out a comprehensive evaluation. The result shows that He 3 and He 2 members are the best of reservoir
performance,followed by Shan 1 member and He 1 and Shan 2 are the worst.

Key words: Daniudi Gas Field, Upper Paleozoic, lower porosity and permeability, diagenesis, reservoir evaluation