State Key Laboratory of Petroleum Resource and Prospecting Beijing 102249 China;
Basin and Reservoir Research Center China University of Petroleum Beijing 102249 China;
Key Laboratory for Hydrocarbon Accumulation Mechanism Ministry of Education Beijing 102249 China;
Southern Exploration and Development Division Company SINOPEC Chengdu 610041 Sichuan China;
structural style; deformation mechanism; detachment layer; salt-related strucrnre; hydrocarbon accumulation; northern Sichuan Basin;