Petroleum Reservoir Evaluation and Development >
2022 , Vol. 12 >Issue 1: 171 - 180
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2022.01.015
Outcrop characteristics and shale gas geological significance of the second member in Doushantuo Formation of Lower Sinian in western Hubei
Received date: 2021-07-19
Online published: 2022-03-24
With the first discovery of the world's oldest shale gas in Doushantuo Formation of the Lower Sinian in the southern wing of the Huangling anticline, the gas-bearing property of the dark shale has been confirmed. As the main gas-bearing shale bed, the second member of Doushantuo Formation has wide distribution, large sedimentary thickness and good shale quality. Based on the geological survey, and the layers division and characterization of the typical Early Sinian outcrop in Toudingshi Village, Sandouping Town, western Hubei, it is proved that the second member of Doushantuo Formation in this area is a set of dolomitic lithologic assemblage with potential for gas generation. Combined with the core data of the adjacent geological survey Well-ZD-2, the sedimentary characteristics, hydrocarbon generation and reservoir conditions are comprehensively discussed. Results show that the high evolutionary level of the kerogen controls the formation gas content. The adsorbed gas which depends on the Nanometer pores and micro-fractures, is the main component of shale gas in the normal formation pressure.
Key words： shale gas; resource potential; Doushantuo Formation; Sinian System; western Hubei
Haohan LI , Shujing BAO , Yanlin ZHANG , Ke DUAN , Ke CHEN , Zhi ZHOU , Teng SONG , Fei LI . Outcrop characteristics and shale gas geological significance of the second member in Doushantuo Formation of Lower Sinian in western Hubei[J]. Petroleum Reservoir Evaluation and Development, 2022 , 12(1) : 171 -180 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.01.015
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