柴达木盆地西部南区是青海油田目前探明储量和产量最多的地区。多年来的勘探成果表明,北西向及近南北向断裂的形成、演化及展布对柴西南区油气成藏具有十分重要的控制作用。在对柴西南区主要断裂时空发育特征描述与分析基础上,进一步阐明了这2组断裂的形成机制和对柴西南区构造圈闭、有利沉积相带、油气运聚成藏过程及油气藏保存、富集等成藏要素的控制作用。

The southwest area of Qaidam basin has the most positive reserves and yields in Qinhai oil field at the preseat. Results of exploration and development indicate that formation and evolution  and distribution of the north\|west orientationand south-north orientation fractures have very important control action of hydrocarbon accumulation in the southwest area of Qaidam basin. On the base of description and analysis of main fractures time-space developmental characteristics, this paper further expound formation mechanism of these two suites of fractures and control action of structure trap, favorable sedimentary facies distribution, process of hydrocarbon migration and accumulation, degree of hydrocarbon preservation and mineral dressing.