The faulting characters and evolution history of the Tuopu 39 fault system

and the Shunbei 1

Shunbei 5 fault zones

distributed in Shunbei area and its surroundings

Tarim Basin

were investigated in detail.Based on the analysis of fault evolution on mechanics and large amount of single-well production performance

we fully discussed the control of strike-slip faults on hydrocarbon enrichment.The integrated analyses reveal fundamental differences between the Tuopu 39 fault system and the Shunbei 1

Shunbei 5 fault zones in terms of geometries

kinematics

and structural evolution.The NNE-trending Tuopu 39 fault system experienced sinistral movement in conjugate strike-slipping state at the early stage

but turned to dextral strike-slipping at the late stage due to the change of the orientation of maximum principal stress.In comparison

the NNW-trending secondary faults inside the system were almost inactive.Shunbei 5 fault zone(NNW-NS-trending) formed ahead of the NE-trending Shunbei 1 fault zone and experienced different stress regimes and changes of the maximum principal stress orientation.The faulting movements of Tuopu 39 fault system in the late stage occur in Himalayan period

the same as hydrocarbon accumulation

thus control the hydrocarbon enrichment

particularly in the pull-apart areas along the fault zone.The analysis on multiple production wells on Shunbei 1 fault zone suggests that the underlying strike-slip fault segments and the juxtaposed pull-apart intervals corresponding to the en echelon normal faults of relative bigger intensity are more enriched in hydrocarbons.