A set of salt-gypsum rocks occur in the Upper Jurassic in Zarzhu terrace and its adjacent areas in the Amu Darya Basin

making fault and their combination types complicated

thus being of great significance for petroleum exploration. Through the analysis of the drilling data and seismic data

we studied the development characteristics of salt-related faults and their control on hydrocarbon accumulation. The results show that there are two fault systems in the pre-salt layer and above-salt layer in the study area respectively. They appear in 3 combination styles

i. e. thrust fault in above-salt layer-thrust fault in pre-salt layer

strike-slip in above-salt layer-thrust fault in pre-salt layer

and strike-slip-basement involvement in above-salt layer. The salt-related faults are controlled by tectonic stress field

pre-existing basement faults and thickness of salt-gypsum rocks. In the east part of the study area

where the salt-gypsum rock is thick

there develops two fault combination styles

i. e. strike-slip in above-salt layer-thrust fault in pre-salt layer

and thrust fault in above-salt layer-thrust fault in pre-salt layer. The faults provide trap conditions for hydrocarbon accumulation and do not destroy the sealing integrity of the salt-gypsum rock. While in the west part of the study area

where the salt-gypsum rock is thin and the compress is weak

there develops strike-slip-basement involvement in above-salt layer. The development of faults were controlled by the basement fault

and is destructive to the accumulation of oil and gas in pre-salt layers.