摘要
为了深入了解徐家围子断陷深层不整合结构及其与天然气运移的关系,利用地震、钻井资料对徐家围子断陷深层不整合结构和岩石物性进行了统计分析;结合已有勘探成果划分了不整合运移通道类型,对与不整合相关的天然气运移方式进行了总结。结果表明:火山岩是徐家围子断陷深层不整合的重要组成部分,火山岩半风化岩石的孔渗性远优于顶板岩石;徐家围子断陷深层不整合运移通道可以划分为2大类9亚类,火山岩作为半风化岩石时可以形成多种类型运移通道。与不整合相关的天然气运移模式可归纳为不整合直接运移、不整合与连通砂体组合运移、不整合与断裂组合运移及不整合与断裂、连通砂体组合运移4种类型,不整合与断裂组合运移是沙河子组排出烃类运移至营城组火山岩圈闭的主要输导方式。
In order to study the relationship between the unconformity and the migration of natural gas,this paper analyzes the unconformity,rock structure,porosity and permeability by seismic and drilling data in the Xujiaweizi depression.The transportation path types of unconformity are divided into two categories and 9 subtypes by the exploration dates.The paper also summarizes the four types of natural gas migration model associated with the unconformity.The paper considers that the volcanic rocks are the important component of the unconformity.The porosity and permeability of half-weathered volcanic rocks is better than the volcanic rocks as upper part of unconformity.When the trap is adjacent to the source rocks,the unconformity can migrate the natural gas independently,when the trap is far from the source rocks,the unconformity together with the fault are the main hydrocarbon migration path for the volcanic reservoir in Yingcheng formation.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第6期14-17,111-112,共4页
Petroleum Geology and Recovery Efficiency
基金
国家重点基础研究发展计划"973"项目"南海深水盆地油气资源形成与分布基础性研究"(2009CB219401)
关键词
火山岩不整合空间结构孔渗性运移通道类型天然气运移徐家围子断陷
volcanic rocks
unconformity
spatial structure
porosity and permeability
type of hydrocarbon migration path
natural gas migration
Xujiaweizi fault depression
