Based on the study structural features of the western Qaidam Basin. The first, the writers analyzed the western Qaidam Basin regional tectonic background, the writers held that the Cenozoic Qaidam Basin appertain the giant peripheral Qinghai-Xizang(Tibet) Plateau basin-mountain system, the Altun foreland thrust-fold belt developed in the transitional zone between the mountain and the basin, the thrust activities controlled by the tectonic movement of the Indian Plate and Qinghai-Xizang Plateau during the Himalayan era. The second, on the basis of strike-slip fault scale and deposition effect on the entire basin, the writers held that the strike-slip fault in the western Qaidam Basin can be graded into basin-scale, zone-scale, trap-scale and microscope-scale, the complicated strike-slip fault and relevant tectonic combination in the western Qaidam Basin are related to tectonic movement and tectonic evolution, based on the structural evolution, analysed the strike-slip fault cause of formation in the western Qaidam. The third, the paper discusses how strike-slip faults impact on trap formation, oil and gas transmission, and forming reservoirs, and how strike-slip faults are related to oil and gas accumulation; the strike-slip fault play an important role in oil and gas forming reservoirs, and controlling oil and gas accumulation and distribution, over the past few years, achieved good results in the exploration practice.%笔者等以柴达木盆地柴西地区构造特征为基础,首先分析了柴达木盆地区域构造背景,认为柴达木盆地新生代属于巨型的环青藏高原盆山体系,阿尔金山前前陆冲断带就形成于盆山结合部,阿尔金山前冲断活动主要受控于喜马拉雅运动期印度板块与青藏高原的活动,其次根据走滑断裂规模和走滑断裂对整个盆地沉积的控制作用,将柴西地区的各种复杂走滑断裂分为盆地级(一级)、区带级(二级)、圈闭级(三级)、显微级走滑断裂；柴西地区各种复杂多样的走滑断裂与之伴生的构造组合都与其所经历的构造运动和构造演化有关；在构造演化的基础上分析了柴西各走滑断裂的形成期与改造期,最后研究了走滑断裂在油气成藏过程中起着重要地作用,控制了油气聚集和分布,在勘探实践中取得了很好的效果.
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