Abstract:

Fault is a complex internal structure geological body, that was an important migration pathway of petroleum. Oil and gas can migration along fracture in all directions, but vertical and lateral transportation is a primary way for hydrocarbon accumulation. At different stages of the fault activity cycle, fault conduit mechanism of transporting petroleum is different, and their characteristics are varied. Oil richness can be used to judge the strength of lateral diversion. By compared it with reservoir thickness, overlaying shale thickness and element of fault, it is concluded that overlaying shale thickness is a main factor to control lateral diversion, and reservoir thickness is the secondary factor. In conclusion, (1)Fault conduit has a characteristic of “faulting-cap rock” joint control feature. (2)Zhu 1 Sag has the characteristic of “two peaks” in hydrocarbons accumulating via carrier faults, and the peak of petroleum infilling is decided on regional caprock and fault conduit mechanism.

Key words: fault conduit, lateral diversion, overlaying shale, “faulting-cap rock&rdquo, joint control