The Early Cambrian Mianyang-Changning Intracratonic Sag and Its Control on Petroleum Accumulation in the Sichuan Basin, China

Table 1

The thickness of Sinian (Ediacaran)-Early Cambrian strata in wells across the intracratonic sag.

Formation		Western margin		Center of the Mianyang-Changning intracratonic sag						Eastern margin
		LL-1# (m)	W-28# (m)	WS-1# (m)	Z-4# (m)	GSH-1# (m)	ZS-1# (m)	GS-17# (m)	L-206# (m)	GS-1# (m)	PL-1# (m)
Lower Cambrian	Longwangmiao Fm.	51	81	164	76	211	138	92	555.5	87	124
	Canglangpu Fm.	88	135	182	267	196	129	214	239.5	91.1	191
	Qiongzhusi Fm.	223	356	578	386	459	430	398	210.3	157	247
	Maidiping Fm.	24.5	/	53	198	/	45	285	0.6	/	/
Ediacaran/Sinian	Fourth member of Dengying Fm.	223.5	32	118	/	81	39	/	29.1	262.5	59
	Third member of Dengying Fm.	6	5.5	11	76	4	6	11	No data	67.15	57

(For locations, see Figure 1.)