准噶尔盆地地层流体特征与油气运聚成藏

doi:10.11743/ogg20120416

Abstract

Abstract:

Junggar Basin is a large transpressional superimposed basin experienced multi-stage tectonic movements.Its hydrocarbon accumulation process and reservoirs distribution are complex.By using the new theories and methods of fluid history analysis of petroliferous basins,we comprehensively studied the evolution characte- ristics of chemistry pressure and hydrodynamic fields as well as their effects on petroleum accumulation and distribution in Junggar Basin,revealed the control of hydrodynamics on hydrocarbon generation,migration and accumulation as well as oil-gas-water contact,and identified favorable areas for hydrocarbon exploration.The sealing conditions are poor nearby the northwestern margin of Junggar Basin where desalination occurs due to meteoric water percolate in a downwards direction.Small oil/gas pools may exist in local litholgoic traps or stratigraphic traps in Mahu sag and Pen-1 west sag where desalination occurs due to water discharging from shale compaction.Large oil/gas fields may exist in the northwestern fault-terrace belt, Luliang uplift,Mosuowan-Mobei uplift,Dabasong uplift and Cheguai area where drainage occurs through leakage and leakage-evaporation.

Key words: fluid chemistry, hydrodynamics, fluid pressure field, hydrocarbon migration and accumulation, transpressional superimposed basin, Junggar Basin

CLC Number:

TE122.1

Li Mei, Jin Aimin, Lou Zhanghua, Fa Huan, Zhu Rong. Formation fluid characteristics and hydrocarbon migration and accumulation in Junggar Basin[J]. Oil & Gas Geology, 2012, 33(4): 607-615.

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Formation fluid characteristics and hydrocarbon migration and accumulation in Junggar Basin

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