关键词: 滚动背斜, 同生断层, 张应力, 压应力, 油气圈闭

Abstract: Rollover anticlines were the products of two tectoge nesises:the first was the formation of normal faults under the regional tensile stress. the second was the formation of the rollovet anticiines under the regional compressive stress. The fotmation and distribution of the rollover anticlines were controlled by the synchtonous growth faults. The rollover anticlines were generally located in the downthrow walls of the growth faults and distributed like beads. The growth faults in their eatly stage could act as migration paths for oil and gas. Tn the late stage. the growth faults were reformed into sealed compressive structural planes and were favourable to the preservation of oil and gas. Therefore. the rollover anticlines could become advantageous traps for oil and gas.

Key words: Rollover anticline, Gtowth fault, Tensile stress, Compressive stress, Trap for oil and gas