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Geoscience Letters

Official Journal of the Asia Oceania Geosciences Society (AOGS)

Fig. 4 | Geoscience Letters

Fig. 4

From: Preservation conditions and potential evaluation of the Longmaxi shale gas reservoir in the Changning area, southern Sichuan Basin

Fig. 4

Pores in SEM images of the Longmaxi shale samples. A: XC-1, the bottom of the S1l, black carbonaceous shale, organic matter is distributed among clay minerals, hydrocarbon generation pores developed; B: XC-6, the lower part of the S1l, black siliceous shale, organic matter pores, and microfractures developed; C: XC-1, the bottom of the S1l, black carbonaceous shale, dissolution pores, and microfractures developed; D: XC-5, the lower part of the S1l, black siliceous shale, organic matter pores, microfractures, and intergranular pores developed; E: XC-4, the lower part of the S1l, black siliceous shale, interlayer pores, stacked pores, and interlayer microfractures developed; F: XC-4, the lower part of the S1l, black siliceous shale, pyrite mold pores, interlayer pores of clay minerals, and microfractures developed, and a certain amount of organic pores are filled with clay minerals. A–F are SEM images of shale samples, and a–f are the extraction of pores from images A–F correspondingly

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