Abstract: Under a unified SSW directied stress field, a three dimensional compressional-torsional vertical, intersecting faulting in Qaidam Basin has formed a NWW oriented zone with alternate uplifts and depressions joining two sets of NEE and NNW conjugated torsional-compressional zones, generating a complex fault uplifts and fault depression zone. Under this framework, the northwest part of the basin formed a sinistral basin belt, while four dextral basin belts were formed in the north-east of the basin. Qaidam basin is a Cenozoic and Mesozoic basin sandwiched between these two belts. This general framework also controls structural units of different orders. Within five types of fault depressions, the historical complex fault depressions formed by three sets of faulting is favourable for oil generation, mostly along the fringe of the basin in its early period. Later, the center of oil generation shifted towards the central part along with subsidence. The uplift formed in the compressional-torsional zone corresponding to oil generating fault depression is favourable for oil accumulation. The author has summarized six" types of faulted structure oil-gas deposits, and put forward the controlling effect of compressional-torsional vertical, intersecting faulting on the western part of China's compressional zone oil-gas generation.

摘要： 在青藏高原南南西统一应力场作用下,三维空间展布的压(扭)性垂向交叉断裂十分发育。北西西向隆、坳相间带,被北东东与北北西向两组共轭扭压带所交接,形成了复合断隆、断陷带。在此格局下,西北部形成左行斜列盆地带,东北部形成四条右行斜列盆地带,于两带之间形成了柴达木中新生代盆地。这种格局对柴达木盆地内部的各级构造单元育着控制作用。本文按其断裂组合的交接情况,分为五种断陷类型,其中以三、四组断裂形成的历史复合断(坳、凹)陷最有利于生油。断陷形成的早期多在盆地边缘,而后随着沉降向中央迁移,生油中心亦随之迁移。与生油断(坳、凹)陷相关的扭压带上所形成的隆起有利于聚油。同时总结了六种断裂构造油气藏类型,并阐述了压(扭)性垂向交叉断裂对我国西部压性区油气控制的问题。