荣兴屯地区古近系油气成藏特征及挖潜目标
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摘要
对荣兴屯地区古近系油气藏主要类型及其分布特征进行总结以揭示其潜在的增储目标。利用地震、钻测井与测试等资料,通过制作已有油气藏分布的平面图、剖面图,明确了油气藏类型多为断层有关的构造型及复合型油气藏,平面上多呈点状与带状主要依附于荣兴屯等主断裂及其伴生构造上,其富集程度表现为南优北差、西富东贫;油气纵向贫富差异大,主要发育层位依次为东三段、沙一段及东二段,其中以东三段最优;复杂断裂体系与不同类型的储盖组合对油气纵向展布产生了重要影响,使之具有"线运点聚"纵向叠置成片的复式聚集成藏特征。研究结果认为荣兴屯斜坡带是有利的潜在增储目标区,目标类型是与断裂相关的构造型及复合型圈闭油气藏。
The potential remaining resources are bigger in the Rongxingtun area,Eastern sag,Liaohe Depression,it needs to carry on the research for the main reservoir types and distribution characteristics in order to promote the further exploration in this area. Using seismic,drilling and well logging and testing data,by making the planar and vertical profile maps for the existing reservoir distribution,the main types,distribution characteristics and potential reservoir targets were summarized in this paper. It revealed that the reservoir types are the structural reservoirs and complex reservoirs which is related to faults,it tend to distribute mainly as the dotted and belt shape in the planar distribution,and closely related to the various faults and their associated structures,the south and west part more richer than the north and east part for their accumulation degree. Moreover,it is large difference in vertical hydrocarbon accumulation,the main sections of hydrocarbon distribution are the third section of the Dongying formation,first section of Shahejie formation and second section of Dongying formation separately,the most complex fracture system and the different types of assemblages has exerted important influence on the vertical distribution of oil and gas,make them vertically superimposed with each other. Finally,it demonstrated that Rongxingtun slope belt is favorable potential target zone,the basic target types are the structural and complex traps reservoirs related to faults.
引文
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