Evidence of the Middle Permian marine mixed type source rocks in the northwestern Sichuan Basin and its contribution to large gas reservoirs in Shuangyushi area
Gao Guohui, Cao Jian, Luo Bing, Xiao Di, Zhang Ya, Chen Cong
Acta Petrolei Sinica . 2020, (4): 433 -445 .  DOI: 10.7623/syxb202004006