Table 8 The main positions of different types of diagenetic facies in the architectural elements.

From: Research on sand body architecture at the intersection of a bidirectional sedimentary system in the Jiyuan area of Ordos Basin

Type of diagenetic facies

FA1

FA2

FA4

FA6

Chang 82–1 Chlorite lining residual intergranular pore diagenetic facies

FA4 bottom

FA6 middle and lower

Chang 82–2 Illite-siliceous cement dissolution pore diagenetic facies

The upper part of FA4

Chang 82–3 Chlorite filling and carbonate-cemented microporous diagenetic facies

FA6 lower part

Chang 82–4 Carbonate-cemented compacted diagenetic facies

The upper part of FA4

Chang 9–1 Chlorite film and siliceous cement intergranular diagenetic facies

Central FA1

FA2 lower part

Chang 9–2 Chlorite film and lunate zeolite cement weakly dissolving diagenetic facies

The upper part of FA4

FA6 upper middle

Chang 9–3 Illite film intergranular diagenetic facies

The upper part of FA4

Chang 9–4 Lautonite cementation dissolution pore diagenetic facies

The upper part of FA1

The upper part of FA2

FA6 bottom

Chang 9–5 Carbonate-cemented dense diagenetic facies

FA4 bottom

FA6 bottom