Huoshiling Hydrocarbon Accumulation in Dongling Area of Changling Depression
Received date: 2011-10-18
Revised date: 2012-03-09
Online published: 2012-08-10
Huoshiling Formation of Dongling area in Changling depression is a typical residual basin.In recent years,a great breakthrough has been made in the Huoshiling clastic exploration of the Dongling area.In this paper,we make clear the feature of petroleum accumulation and enriching pattern after analyzing accumulation condition of Huoshiling Formation in the Dongling area.In Huoshiling Formation,the dark mudstone with big thickness and wide distribution,which was formed in the semi-deep and deep lake facies exists,is at mature-high mature stage of thermal maturity.There are two types of reservoirs in Huoshiling Formation,one is the delta front sand bodies of K1h1,the other is the volcanic reservoir of K1h2.The K1h1 reservoir is a lithologic and stratigraphic reservoir of self-generation and self-accumulation while the K1h2 reservoir is a structural-lithologic one of lower-generation and upper-accumulation.The distribution of hydrocarbon reservoirs is controlled by K1h1source rocks.The difference of fluid transporting conditions leads to distribution of gas in western part and oil in eastern one.Trap conditions confine the reservoir type and hydrocarbon enrichment.
XIAO Yong-jun,XU Youde,DUAN Xiao-yan,YU Yong-li . Huoshiling Hydrocarbon Accumulation in Dongling Area of Changling Depression[J]. Natural Gas Geoscience, 2012 , 23(4) : 720 -726 . DOI: 10.11764/j.issn.1672-1926.2012.04.720
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