Evaluation of Favorable Shale Gas Intervals in Dawuba Formation of Ziyun Area, South Qian Depression

Figure 2

Images of shale samples from Dawuba Formation: (a) black shale sample from the fourth member of Dawuba Formation; (b) black shale with argillaceous stripe sample from the third member of Dawuba Formation; (c) black shale sample from the second member of Dawuba Formation; (d) black shale sample from the first member of Dawuba Formation.

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