J4 ›› 2010, Vol. 40 ›› Issue (2): 447-454.

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Characteristic of Water Bearing Formation and Well Logging Identification Method of Gas Reservoir in Sulige Gas Field

ZHANG Hai-tao1,2,SHI Zhuo2   

  1. 1.Geology Department, Northwest University, Xi’an 710069, China;2.Exploration and Development Research Institute,Changqing Oil Field Company, Xi’an 760021, China
  • Received:2009-06-22 Online:2010-03-26 Published:2010-03-26

Abstract:

The He 8 (Member 8 of the Upper Permian Shihezi Formation) and Shan1 gas reservoir in the Sulige field of Ordos basin is an inefficient fluvial facies gas reservoir drived by elasticity. The reservoir has strong heterogeneity and produces water widely during fracture testing.From the tested and explored data, the authors divide the water bearing gas zone into three types: irreducible water, interlayer water and retained water, and analysis the characters of them. According to the well logging response mechanism of gas, the recognition methods for gas-water layers, such as cross plot method, gas logging comprehensive distinguishing method, induction and laterolog joint interpretation method, are proposed. Based on these procedures, the logging interpretation coincidence rate of low resistivity oil reservoir was raised from 70% to 80%.

Key words: characteristic of water bearing gas zone, well logging interpretation, Sulige gas field, reservoirs

CLC Number: 

  • P618.13
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