摘要
在分析中国沉积盆地内火山岩发育构造背景与分布的基础上,通过观察、统计和实验测试大量的火山岩储层岩心样品,分析火山岩储层特征及油气聚集规律。研究认为:中国沉积盆地内火山岩主要发育在石炭—二叠、侏罗—白垩和古近—新近等3套层系,主要形成于俯冲造山后伸展裂陷、克拉通地幔柱和断陷3种构造环境;不同岩性火山岩均可形成有效储层;储集空间类型多样,以次生溶蚀孔、气孔、微裂缝为主,形成孔缝双介质储层;储层物性变化大,非均质性强,基本不受埋深影响,以中—较高孔隙度、低—特低渗的Ⅲ类和Ⅳ类储层为主;火山岩储层邻近烃源岩发育,有利火山岩油气聚集成藏;中国东西部火山岩油气藏存在近源和远源2种聚集模式,东部断陷以近源聚集为主,火山岩与烃源岩互层,西部近源与远源均存在。该研究可为中国火山岩的油气勘探提供依据。
On the basis of analyzing the tectonic setting and distribution of volcanic development in sedimentary basins of China,by means of observing,counting and testing substantive volcanic reservoir core samples,this paper analyzed the reservoir characteristics and hydrocarbon accumulation laws of volcanic rocks. Based on our study,the volcanic rocks in sedimentary basins of China were mainly developed in threesets of series( Carboniferous- Permian,Jurassic- Cretaceous and Paleogene- Neogene systems),and were mainly formed in threetypes of tectonic settings( elongated rift after subduction orogeny,craton mantle plume and fault depression); effective reservoirs could be formed by different volcanic rocks; the reservoir space type was diverse,dominated by secondary dissolved pore,vesicle and microfracture,resulting in forming pore and fracture reservoirs; the reservoir properties change greatly,with high heterogeneity,basically not affected by buried depth,and dominated by type III and IV reservoirs with moderate- high porosity and low- ultra low permeability; the volcanic reservoirs were developed near the source rocks,which isfavorable for hydrocarbon accumulation in volcanic rocks; and there areproximal and distal accumulation modes in the volcanic reservoirs in eastern and western China: proximal accumulation predominates in the fault depressions of eastern China,where volcanic rock and source rock are interbedded,while both proximal and distal accumulations exist in western China. This study has provided bases for hydrocarbon exploration of volcanic rocks in China.
出处
《特种油气藏》
CAS
CSCD
北大核心
2015年第5期1-8,151,共8页
Special Oil & Gas Reservoirs
基金
国家重点基础研究发展计划"中国陆相致密油(页岩油)形成机理与富集规律"(2014CB239000)及"古生代火山岩储层分布规律及其改造特征"(2009CB219304)
国家科技重大专项"岩性地层油气藏成藏规律
关键技术及目标评价"(2011ZX05001)
中国石油集团公司科学研究与技术开发项目"岩性地层油气藏成藏规律研究与关键技术攻关"(2014B-03)
关键词
火山岩储层
储集空间
油气聚集
准噶尔盆地
松辽盆地
volcanic reservoir
reservoir space
hydrocarbon accumulation
Junggar Basin
Songliao Basin
