Hydrocarbon migration and accumulation are the results of combined action of various factors

but tectonic stress is the main driving force of hydrocarbon migration and accumulation during tectonic active period.Sedimentary rock deformation caused by tectonic stress results in heterogeneous distribution of tectonic stress field with several concourse and dissipation centers of energy

driving oil and gas to migrate from high potential area to low potential area.Hydrocarbons tend to migrate upward along fractures and faults and from the sag's center to its periphery area.Fractures and faults act as the favorable pathways of hydrocarbon migration.Tectonic movements were most intensive during Indosinian and Himalayan in Junggar basin and had the largest control on hydrocarbon migration and accumulation.As for the Permo-Carboniferous petroleum system controlled by Indosinian tectonic movement

the direction of hydrocarbon migration was basically in parallel with the maximum major stress gradient

and hydrocarbons migrated from high stress area to low stress area.The discovered oil and gas reservoirs are mainly distributed in the low major stress area and on both sides of area with dense stress contour lines.While the Tertiary petroleum system controlled by Himalayan tectonic movement

hydrocarbon migration and accumulation mainly occurred in the southern edge of the basin with strong tectonic deformation

and hydrocarbons have migrated from the high stress area on the southern edge of oil-generating depression to the low stress area in the north.The local low tectonic stress areas in the southern part of the basin

such as Hutubi

Chepaizi(Dushanzi)

Maqiao and Baijiahai

are favorable for hydrocarbons to enrich and accumulate.