By the hand of availab le geology, geophysics and core data, and combining with recent exploration and research, the fissure and microfissure pathways for hydrocarbon migration have been identified in the blurry seismic reflection area of diapiric structure zone in the central diapir zone, Yinggehai Basin. The distribution of those vertical pathways in each diapiric structure is also revealed by using the coherence and 3 -D visualization and hollowed-out techniques. The vertical pathways in the study area can be divided into diapir pathway, fault pathway and fissure pathway. The diapir pathway is the most important hydrocarbon migration pathway, which is made up of fissures and microfissures developing within diapir structures. It can be analyzed by using the qualitative judgment, core identification, forward modeling and other integrated technique. The fault pathways commonly are the faults developing within diapir structures, which seldom develop outside diapir structures. They may have several periods of development. Although the fissure pathways outside diapirs are commonly small in scale, they are better in the capacity of vertically migrating fluid than the diapir pathways or fault pathways. Dongfang 13-1 and Dongfang 13-2 are the large mid-deep gas fields discovered in recent years in Yinggehai Basin where the connection of hydrocarbon source with reservoirs just depends on fissure pathways.