西南石油大学学报(自然科学版)

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Discuss on the Natural Gas Dominant Migrating Channel of#br# Zhenzhuchong Segment in Yuanba Area

Cheng Lixue*   

  1. Branch of SINOPEC Exploration Corp,Chengdu,Sichuan 610041,China
  • Online:2015-12-01 Published:2015-12-01

Abstract:

The reservoir of the Jurassic Ziliujing formation Zhenzhuchong Segment in Yuanba area of northeast Sichuan Basin
possesses good potential with natural gas resources. But the distribution of gas is not clear,so it limits the selection of the
exploration direction. The research on the dominant migrating channel of gas needs to be carried out. In this paper,taking
advantage of drilling and seismic data,the author detailedly analyzes the geological factors that could affect gas migratory
direction in Zhenzhuchong Segment of Ziliujing Formation reservoir. Meanwhile it defines five kinds of main controlling factors
which include higher permeability conducting sand body、fault、unconformity surface、tectonic background and structure form
of cover bottom. By researching the relationship between each main controlling factor and gas migration direction,the author
puts forward two models of dominant migrating channel of Zhenzhuchong Segment in Yuanba area. The first is along the sand
body-fault composite channel,and the second is along the sand body-unconformity surface composite channel. The first one is
more favorable for high gas concentrating. And then it effectively indicates the future exploratory direction.

Key words: Yuanba area, Zhenzhuchong Segment, high concentration, dominant migrating channel

CLC Number: