西南石油大学学报(自然科学版)

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Natural Gas Accumulation Sequence Research:A Case Study on#br# Jurassic Petroleum System in Taibei Sag

Zhang Yu1*, Zhang Jinchuan1, Yang Shengyu2, Huang Weidong3   

  1. 1. School of Energy Resources,China University of Geosciences(Beijing),Haidian,Beijing 100083,China
    2. German Research Center for Geosciences,Potsdam D14473,Germany
    3. Tuha Oilfield Company,CNPC,Hami,Xinjiang 839009,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

Conventional gas,tight gas and shale gas are very rich in Jurassic petroleum system in Taibei Sag. Geological
analysis pointed out that the distribution rules and reservoir features of the shale gas,tight gas and conventional gas are of
sequential characteristics. Based on exploration and development practices,we concluded that shale gas,tight gas and conventional
gas always exist together in a petroleum system. They have experienced source rock retaining,primary migration,
secondary migration and accumulation,and formed different types of gas reservoirs in shale,tight sand and conventional reservoirs
respectively. Sequential characteristics including migration periods,accumulation times,distributions,gas contents,
development techniques,reserve characteristics and E & P periods were summarized. In one petroleum system with suitable
geological environments,different types of gas reservoirs can be found after any types of reservoirs in the sequence which was
discovered first. This rule could be a new approach in gas exploration.

Key words: Taibei Sag, petroleum system, gas sequence, shale gas, tight gas

CLC Number: