Abstract:

Structural transfer zones, which are widely developed in northwestern  Junggar basin, controlled the distribution of sediments and oil & gas reservoirs. Through a study on the characteristics of faults and their combined patterns, transfer zones can be classified into two types: the transverse abrupt) transfer and longitudinal progressive) transfer. Distribution characteristics of sedimentary system and the thickness of sandstone indicate that transverse transfer zones are the entrance for basin-margin water systems. Development of regional sediments has been influenced by these tectonic belts; longitudinal transfer zones can also enrich local sediments. Matching relation between reservoirs and transfer zones shows that regions around transverse transfer zones are the most favorable places for hydrocarbon accumulation. Transverse faults are essential during the process of hydrocarbon migration and accumulation. Overlapping parts in longitudinal transfer zones have more advantages for forming traps so that distribution of reservoirs in a relatively small area could be affected by these particular structural units. 

Key words: structural transfer zone, Junggar basin, sedimentary system, reservoir-forming