西南石油大学学报(自然科学版)

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Petroleum Accumulation Field in the Deep Strata of the Eastern Slope Area
of the Mahu Sag,Junggar Basin

Chen Gangqiang1, Ablimit1, Bai Lei2, Zhang Jiahao1, Bian Baoli1   

  1. 1. Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Kelamayi,Xinjiang 834000,China
    2. Institute of Experiment and Analysis,PetroChina Xinjiang Oilfield Company,Kelamayi,Xinjiang 834000,China
  • Online:2013-12-01 Published:2013-12-01

Abstract:

In order to deepen the hydrocarbon exploration in the slope area of the Mahu Sag,northwestern Junggar Basin,
and to provide a reference for studies with similar geological settings worldwide,we investigated the field of hydrocarbon
accumulation and exploration in the deep strata of the eastern slope area. This was conducted based on analyzing accumulation
features and conditions. Results show that the deep strata surrounding the Permian-Triassic unconformity is a key target of
exploration in the studied area. In the target Permian and Triassic reservoirs,the oil is light in nature and they have good
preserving conditions,favorable facies and relatively good-quality reservoir. Thus,high production may be likely,especially
in the sub-facies of fan delta front. Combined with analyses of sedimentary and seismic facies and an integration/comparison
of wells and seismic data,we investigated the spatial distribution of favorable facies and the dominant trap types. Results show
that the favorable exploration area is large and the lithologic and stratigraphic trap is widely developed. Considering the low
exploration level currently,the exploration prospect is wide and large. This likely provides a new exploration field and,thus,
deserves to be strengthened in the future exploration.

Key words: Mahu sag of the Junggar Basin, slope area, deep strata, lithologic and stratigraphic hydrocarbon pool, petroleum
accumulation