摘要
利用地震剖面及岩性、物性等资料 ,综合研究准噶尔盆地环玛湖凹陷二叠系不整合结构类型及分布 ,根据不整合面上下岩性及其组合形式 ,划分出 4种不整合结构类型 :火山岩角块带 +残积土 ,火山岩角块带 +底砾岩 ,碎屑岩 +残积土(泥岩 ) ,碎屑岩 +底砾岩。其中火山岩角块带张性裂缝是油气渗滤的主要通道 ;碎屑岩不整合面之下的剥蚀带或者剥蚀带与其上的底砾岩共同组成油气运移的主要通道。图 2表 1参 10 (陈建平摘 )
Unconformity textures and distribution are studied in the circum Mahu depression of Junggar basin through seismic profile and lithology analyses, and four types of unconformity structure are classified, i.e. the combination of volcanic breccias and eluvium (mud seal), the combination of volcanic breccia and basal conglomerates, the combination of clastic rocks and eluvium (mud seal), the combination of clastic rocks and basal conglomerates. The extensional cracks in volcanic rock unconformity are the main passage for oil infiltration; the erosion belt or/and overlying basal conglomerates under clastical unconformity provided the major pathway for oil migration.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2002年第4期29-31,共3页
Petroleum Exploration and Development
关键词
准噶尔盆地
环玛湖凹陷
二叠系
不整合特征
油气运移
运移通道
Junggar basin
circum Mahu depression
Permian
unconformity texture
unconformity type
migration pathway
