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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2005  >  27(2): 158-163
Liu Yuan, Luo Qun, Pang Xiongqi, Li Zilong. GEOLOGIC FEATURE AND MIGRATION-ACCUMULATION MECHANISM OF THE MAHAI GAS FIELD, THE QAIDAM BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2005, 27(2): 158-163. doi: 10.11781/sysydz200502158
Citation: Liu Yuan, Luo Qun, Pang Xiongqi, Li Zilong. GEOLOGIC FEATURE AND MIGRATION-ACCUMULATION MECHANISM OF THE MAHAI GAS FIELD, THE QAIDAM BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2005, 27(2): 158-163. doi: 10.11781/sysydz200502158
shu

GEOLOGIC FEATURE AND MIGRATION-ACCUMULATION MECHANISM OF THE MAHAI GAS FIELD, THE QAIDAM BASIN

doi: 10.11781/sysydz200502158
  • 1.

    Department of Earth Sciences, Zhejiang University, Hangzhou, Zhejiang 310017, China

  • 2. Beijing Zhanpu Petroleum Technology Development Co. Ltd, Beijing 102249, China

  • 3. Research Center of Basin and Accumulation, University of Petroleum, Beijing 102249, China

  • Received Date: 2004-09-21
  • Rev Recd Date: 2005-04-01
  • Publish Date: 2005-03-25
    Abstract
  • The Mahai gas field includes Mahai shallow layer tectonic gas accumulation and Mahai deep layer stratigraphic overlap gas accumulation with different accumulation types, forming periods, as well as main controlling forces. Gas of the two accumulations both come from the Yibei depression 40-50 km to the Mahai gas field. Fault and unconformity are the most important paths for vertical and lateral migration. The formation and evolution as well as dynamic features are different, resulting in two kinds of gas migration-accumulation mechanism models: 1)"tectonic stress drives gas to migrate along fault-conduction and forms secondary gas accumulation" for the Mahai shallow layer tectonic gas accumulation; 2)"buoyancy drives gas to migrate along fault-unconformity and forms primary gas accumulation" for the Mahai deep layer stratigraphic overlap gas accumulation. Favorable gas accumulation regions of the Qaidam basin are forecasted according to the two mechanism models.

     

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