SIGNIFICANCE FOR PETROLEUM ACCUMULATION OF SYNSEDIMENTARY COMPRESSIVE-SHEAR FAULTS IN SOUTH-WEST OF QAIDAM BASIN
同沉积压扭断层在柴达木盆地西部南区油气成藏中的意义

The fault planes of reverse faults in south-west of Qaidam basin are shovel and the growth indexes are ranging from 1.3 to 2.5, the fault throws become smaller from bottom to top and more and more strong from one side to another laterally, and they are typical synsedimentary compressive-shear faults. The evolution process can he divided into four stages, synsedimentary faulting, folding, sleeping and activating. The active NWW mainly faults control the structural zones and the combination of source rock, reservoir and seal rock. Moreover, the NWW faults connect the source rock and traps effectively. The NS minor faults dominate the evolution of local traps, and determine the petroleum accumulation together with the NWW faults.