Skip to Main Content
GEOREF RECORD

Investigation of the methane adsorption characteristics of marine organic-rich shale; a case study of the Lower Cambrian Niutitang Shale in the Fenggang Block, northern Guizhou Province, south China

Gu Yang, Ding Wenlong, Min Yin, Wang Ruyue, Jiao Baocheng, Zhao Gang and Lu Lin
Investigation of the methane adsorption characteristics of marine organic-rich shale; a case study of the Lower Cambrian Niutitang Shale in the Fenggang Block, northern Guizhou Province, south China
Interpretation (Tulsa) (November 2018) 6 (4): T819-T833

Abstract

AbstractThe marine shale in South China has great gas exploration potential, and exploration in the Sichuan Basin has been successful, but the degree of exploration remains low in the Guizhou Province. We used organic geochemical analyses (total organic carbon content and kerogen type), scanning electron microscopy (SEM), field emission SEM, nuclear magnetic resonance (NMR), X-ray diffraction analysis, and low-temperature CO2 and N2 adsorption experimental methods to study the micropore types and pore structures and their effects on the methane adsorption capacity of organic-rich shales found in the Fenggang block in northern Guizhou Province. The results indicate that the microscopic surface porosity of the lower Cambrian Niutitang Formation ranges from 2.88% to 5.34%, with an average value of 3.86%. Based on nitrogen adsorption methods, the range of the average pore size distribution is 4.6-9.491 nm, with an average value of 6.68 nm. All of the samples exhibit significant unimodal distributions. The main pore size is less than 10 nm, and these pores account for most of the mesopore volume, which is generally consistent with the NMR results. The methane adsorption capacity of the shale samples gradually increases in the range of 0-8 MPa at 30 degrees C and reaches a maximum at approximately 10 MPa. Positive correlations were found between the gas content and specific surface area, total pore volume, and micropore volume. These strong correlations indicate that the Niutitang Shale has a high specific surface area, a high pore volume, and narrow-diameter pores, demonstrating that it has a high gas adsorption capacity. The results of this study provide valuable information regarding the adsorption characteristics of marine shales and the factors that affect those characteristics.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 6
Serial Issue: 4
Title: Investigation of the methane adsorption characteristics of marine organic-rich shale; a case study of the Lower Cambrian Niutitang Shale in the Fenggang Block, northern Guizhou Province, south China
Affiliation: China University of Geosciences (Beijing), School of Energy Resources, Beijing, China
Pages: T819-T833
Published: 201811
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 73
Accession Number: 2019-007240
Categories: Economic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch map
N25°49'60" - N29°30'00", E105°00'00" - E110°00'00"
Secondary Affiliation: University of New South Wales, AUS, AustraliaSinopec, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute.
Update Code: 201906
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal