CAJ | 학술논문

该区中新生代形成了伸展构造、扭动构造、逆冲-褶皱构造等构造样式.早、中侏罗世形成的正断层组合构造样式,可形成一些小规模油气藏.老第三纪形成的压扭性构造对油气的聚集有重要控制作用.而新第三纪—第四纪形成的逆冲-褶皱构造的含油气性差异很大，在早期断层基础上发育的逆冲-褶皱构造有利于油气分布，而新形成的逆冲-褶皱构造，通常不利于油气聚集.构造应力对油气的运移聚集有重要影响，构造应力变化速率引起的应力驱动，是油气沿断层垂向运移的主要动力，在断层附近应力值适中、岩石扩容量较大、微裂缝发育的区域，是油气聚集的有利场所.
해구중신생대형성료신전구조、뉴동구조、역충-습추구조등구조양식.조、중주라세형성적정단층조합구조양식,가형성일사소규모유기장.로제삼기형성적압뉴성구조대유기적취집유중요공제작용.이신제삼기—제사기형성적역충-습추구조적함유기성차이흔대，재조기단층기출상발육적역충-습추구조유리우유기분포，이신형성적역충-습추구조，통상불리우유기취집.구조응력대유기적운이취집유중요영향，구조응력변화속솔인기적응력구동，시유기연단층수향운이적주요동력，재단층부근응력치괄중、암석확용량교대、미렬봉발육적구역，시유기취집적유리장소.
Three kinds of structural patterns present on the northern marginof the Qaidam basin in the Mesozoic and Cenozoic are shown in this paper as follows: the extensional structure, the torsional structure, and the thrust-fold structure. The structural pattern of the normal fault assemblage that occurred in the Early and Middle Jurassic may have initiated some small-scale petroleum and gas pools. The compressive torsional structure that occurred in the Early Tertiary may have controlled the accumulation of petroleum and gas. However, the petroleum and gas-bearing properties vary greatly in the thrust-fold structure that occurred in the Late Tertiary-Quaternary. The thrust-fold structure that have developed from the early fault is favorable for the distribution of petroleum and gas. On the other side, the newly-formed thrust-fold structure is usually not favorable for the accumulation of petroleum and gas. The structural stress has an important effect on the migration and accumulation of petroleum and gas. The stress caused by the change in the structural stress rate is the main driving force for the vertical migration of the petroleum and gas along the fault. Near the fault, the stress value is moderately medium, the lithological dilation is relatively great, and the micro-cracks develop well. Such a region is favorable for the accumulation of petroleum and gas.