鄂尔多斯盆地伊盟隆起什股壕区带气藏类型

doi:10.11743/ogg20160210

Abstract

Abstract: Lithologic and anticlinal gas reservoirs were developed in the Lower Permian Shanxi Formation and Lower Shihezi Formation in Shiguhao area of Yimeng Uplift, Ordos Basin.In order to study the hydrocarbon accumulation rules and optimize emplacement of horizontal wells, it is essential to analyze the geometries and types of the gas reservoirs.Based on drilling and seismic data in combination with identification of gas and water layers and test results, this paper analyzed the geometries on plane and sectional views of typical gas reservoir and researched the mainly factors that influence the sealing of gas reservoirs.Five types of gas reservoirs are recognized in the study area.In vertical, lithologic gas reservoirs are mainly developed in the P₁x² and the P₁x³, anticlinal gas reservoirs are mainly developed in the P₁x¹, stratigraphic overlapping gas reservoirs and structural-lithologic gas reservoirs are the predominant types in the Shanxi Formation.On the plane, lithologic and stratigraphic overlapping gas reservoirs are mainly developed in the slope belt of western Shiguhao area; anticlinal and structural-lithologic gas reservoirs are mainly developed in uplift belt of eastern Shiguhao area.Meanwhile, interlayer faults are well developed in Shiguhao area.In addition to small scale fault block gas reservoirs, some lithologic and anticlinal gas reservoirs are cut by interlayer faults, changing their geometries.By using three-dimensional seismic data, the geometries of gas reservoirs can be depicted accurately.

Key words: geometry of gas reservoirs, lithologic gas reservoir, anticlinal gas reservoir, gas reservoir type, Shiguhao area, Yimeng Uplift, Ordos Basin

CLC Number:

TE122.3

Qi Rong. Gas reservoir types in Shiguhao area of the Yimeng Uplift,Ordos Basin[J]. Oil & Gas Geology, 2016, 37(2): 218-223.

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Gas reservoir types in Shiguhao area of the Yimeng Uplift,Ordos Basin

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