洛阳-伊川地区三叠系致密砂岩油气藏地质特征

doi:10.11743/ogg20130205

摘要/Abstract

摘要：

通过对洛阳-伊川地区三叠系基本石油地质条件的分析,认为三叠纪洛阳-伊川地区与鄂尔多斯盆地处于同一大型坳陷型湖盆,生储盖架构相似,烃源岩发育、厚度大、横向展布稳定、储层致密,且三叠系油气显示丰富,具致密砂岩油气藏形成的地质条件。结合对屯1井上三叠统椿树腰组工业天然气流分析,进一步明确了洛阳-伊川地区三叠系油气藏为具有低孔渗性、地层压力异常、油气呈"上油下气"倒置关系等特征的先成型致密砂岩油气藏,从而指出三叠系为洛阳-伊川地区下一步油气勘探的主攻层系,致密砂岩油气藏是该区勘探的主要方向。

关键词: 屯1井, 致密砂岩, 油气藏, 三叠系, 洛阳-伊川地区

Abstract:

Research of the petroleum geological conditions indicates that Luoyang-Yichuan area is located in the same large depressed lacustrine basin with Ordos Basin in the Triassic.They have similar source-reservoir-caprock associations,thick and extensive source rocks,tight reservoir and active hydrocarbon shows in the Triassic.Therefore,the Luo-yang-Yichuan area has the geological conditions for accumulation of tight sand oil/gas.In combination with the analysis of industrial gas flow from the Upper Triassic Chunshuyao Formation in Well Tun 1,we believe that the Triassic reservoirs of the Luoyang-Yichuan area are pre-existing tight sandstone oil/gas reservoirs with low permeability,abnormal pressure,inverted oil-gas contact with oil in the upper and gas in the lower.The Triassic tight sandstone reservoirs are the main targets of petroleum exploration in Luoyang-Yichuan area in the future.

Key words: Well Tun 1, tight sandstone, oil and gas reservoir, Triassic, Luoyang-Yichuan area

中图分类号:

TE122

杜建波,田景春,胡俊卿,等. 洛阳-伊川地区三叠系致密砂岩油气藏地质特征[J]. 石油与天然气地质, 2013, 34(2): 174-178. doi: 10.11743/ogg20130205 Du Jianbo,Tian Jingchun,Hu Junqing,et al. Geological characteristics of the Triassic tight sandstone oil and gas reservoirs in Luoyang-Yichuan area[J]. Oil & Gas Geology, 2013, 34(2): 174-178. doi: 10.11743/ogg20130205

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