Organoporosity Evaluation of Shale: A Case Study of the Lower Silurian Longmaxi Shale in Southeast Chongqing, China

Table 1

Geochemical characteristics of the shale samples.

Samples	Organic matter type	Vitrinite reflectance , (%)	Total organic carbon (TOC0), (%)	Max temperature , (°C)	Free hydrocarbon; , (mg/g)	Cracking hydrocarbon; , (mg/g)	Hydrogen; Index; , (mg/g)	Sedimentary; period
Xiamaling Shale	II1	0.5	5.98	439	0.45	19.13	320	Precambrian
Longmaxi Shale	II1-I	2.62	1.90	455	0.01	0.31	1.01	Lower Silurian