Fig. 5. Typical characteristics of pore structure of laminated shale and mudstone in the Lucaogou Formation in Well Ji 174, Junggar Basin.
(a) 3145 m, laminated shale with TOC of 5.34%, the dark part is organic matter and a small number of clay minerals, the bright part is dolomite, albite and dolomite, mainly dolomite, polarized light; (b) 3145 m, laminated shale with TOC of 5.34%, black laminated organic matter under SEM; (c) 3145 m, laminated shale with TOC of 5.34%, the pink parts are quartz, the cyan parts are albite, the purple parts are dolomite, the white parts are organic matter, it is the mineral composition plan of Fig. 5(b); (d) 3145 m, laminated shale with TOC of 5.34%, intergranular pores of dolomite and intragranular pores of chlorite under SEM; (e) 3137 m, massive mudstone with TOC of 2.78%, the bright part is dolomite and albite, the rock is in massive texture, polarized light; (f) 3137 m, massive mudstone with TOC of 2.78%, black organic matter is dispersed distributed under SEM; (g) 3137 m, massive mudstone with TOC of 2.78%, the pink parts are quartz, the cyan parts are albite, the purple parts are dolomite, the white parts are organic matter, it is the mineral composition plan of Fig. 5(f); (h) 3137 m, massive mudstone with TOC of 2.78%, intragranular pores of chlorite under SEM.
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