PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083 China;
PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083 China;
PetroChina Southwest Oil&Gas Field Company Chengdu 610051 China;
PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083 China;
PetroChina Tarim Oilfield Company Korla 841000 China;
PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083 China;
central and western China; foreland basin; overpressure system; large gas field; hydrocarbon generation pressurization; under-compaction; salt gypsum layer; overpressure sealing; overpressure residual;