黔中隆起北部瓮安古油藏储层的新发现及其油源分析
New findings and oil-source analysis of the reservoir in Weng'an paleo-oil accumulation on the northern margin of the Qianzhong Uplift
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摘要: 提要：首次对瓮安玉华灯影组富沥青层段进行了描述，明确为瓮安古油藏储集层之一。储集层发育于灯影组中段，储集空间类型主要为晶间孔、晶间溶孔、铸模孔及溶蚀孔洞，为中—高孔高渗的优质储集层。并通过对饱和烃色谱、生物标志物、干酪根碳同位素组成等进行系统对比，认为该沥青源于下寒武统牛蹄塘（?1n）烃源岩。Abstract: Abstract：The bituminous fragments in Dengying Formation are described in this paper for the first time, and have been evidently defined as one of the Weng'an paleo-oil reservoirs. The reservoir is in the middle of Dengying Formation, the pores consist mainly of intercrystal, intercrystal dissolved and moldic pores and caves, being a middle-high porosity and high permeability reservoir. Based on an analysis of saturated hydrocarbon chromatography, biomarkers, and carbon isotopic composition of kerogen, the authors hold that the bitumen originated from Niutitang Formation source rock.
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Key words:
- Weng'an paleo-oil accumulation /
- reservoir /
- biomarkers /
- oil source analysis
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