摘要
大港油田枣35断块沙河街组三段火成岩油气藏为裂缝—孔隙型双重介质稠油油藏,属于复杂特殊类型油气藏。为此,依据岩石岩性、结构和构造以及录井、测井、地震资料,综合研究了大港油田枣35断块火成岩喷发期次、火成岩岩相及展布特征,对储层进行了分类、评价,进而阐述了岩相与油气分布的关系,并进行了开发效果分析。结果认为:枣35断块岩相与储层渗透性具有很好的相关性,其中的气孔玄武岩具有大孔大缝型孔隙结构,具有特高的渗透性,是高产层;气孔玄武岩微相为有利相带,是该区火成岩油气藏的主要储集层段。
A special type of inspissated pool with fractured and porosity traps was discovered in the volcanic formations of the third member of Shahejie Formation in fault block Zao-35 of Dagang Oilfield.Based on the previous studies of rock lithology,structure,and construction,and the collected seismic & logging data,this study focused on the eruption times and periods,the lithofacies,and the distribution features of volcanic rocks in fault block Zao-35 of Dagang Oilfield.Then through classifying and evaluating on the gas formations there,this study described the relationship between rock facies and the distribution of oil and gas,and finally analyzed the effect of the field exploitation.This paper concludes after study that the permeability of formations is decided by rock facies in Zao-35,among which blowhole basalt can be great volume gas produced layer with high permeability because of its large pores and big fractures;and its microfacies should be the favorable zone of the major formations accumulating oil and gas there.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2007年第8期41-43,共3页
Natural Gas Industry
关键词
大港油田
火成岩
气孔玄武岩
火山角砾岩
岩相
开发
效果
Dagang Oilfield,volcanic rock,blowhole basalt,volcanic breccia,lithofacies,development,effect
