摘要
达坂城次四是准噶尔盆地柴窝堡凹陷的次级构造单元。由于受燕山运动的影响，断裂活动剧烈，形成了６个构造带、在逆断层控制下，形成的断块背斜型局部构造．经喜马拉雅运动改造而定型。根据次回生油岩成油演化及其与局部构造、断裂形成期的配套关系，可认为达坂城次四具有形成中小型油气田的石油地质条件。其中柴窝堡背科带为最有利的含油气构造带；西疙瘩－山水地背斜带、土墩子－西沟下寺背斜带是有利的含油气构造带。它们均处于生油凹陷的边缘，有可靠的构造圈间，是次凹内主要的油气聚集带。同时，这些构造带发育了上三叠统及下、中侏罗统区域盖层，有良好的保存条件，可形成围绕次凹中心的环形油气富集带．
Dabancheng Sub-depression is a secondary structural unit of Chaiwobao depressionof the Juggar basin. Due to influence of the Yanshanian movement, the area wasseverely faulted and six structural belts were formed. Local block anticlines,controlled bythrust faults, were finally in their fixed forms during the Himalayan movement.There is petroleum geological condition for formation of middle and small oil and gasfields in Dabancheng sub-depression according to the evolution of source rocks and its relationship with formation time of local structure and faults. Chaiwobao fold zone was themost favorable hydrocarbon-bearing structural zone, and Xigeda-Shanshuidi and TudunziXigouxiasi fold zones were potential ones. Meanwhile, the regional Upper Triassic andLower and Middle Jurassic seals were developed on the structural zones, thereby a circularhydrocarbon-rich belt was formed around the center of the subdepression.
出处
《石油实验地质》
CAS
CSCD
北大核心
1996年第3期237-243,共7页
Petroleum Geology & Experiment
