Formation conditions and accumulation characteristics of Bozhong 19-6 large condensate gas field in offshore Bohai Bay Basin

Changgui XU,Haibo YU,Jun WANG,Xiaojian LIU

Fig. 6. Rock types and fracture characteristics of buried hill in Bozhong 19-6 gas field. (a) Well BZ19-6-2sa, 4 277 m, biotite granodiorite gneiss, core photograph; (b) Well BZ19-6-1, 4 475 m, biotite plagioclase gneiss, plane polarized light; (c) Well BZ19-6-4, 4 574 m, biotite monzonitic granite, orthogonal optical light; (d) BZ19-6-2sa, 4 218.5 m, mixed gneiss, core photograph; (e) Well BZ19-6-2Sa, 3988.5 m, oblique long slices of hemp fractured rock, orthogonal optical light; (f) Well BZ19-6-1, 4 157 m, shredded porphyry, shredded plaque structure, orthogonal optical light; (g) Well BZ19-6-2sa, 4 076 m, diabase, plane polarized light; (h) Well BZ19-6-2sa, 3 939.5 m, granitic porphyry, plane polarized light; (i) Well BZ19-6-2sa, 4 025 m, ivernite, orthogonal optical light; (j) Well BZ19-6-1, 4 030 m, early weathering and leaching seams; (k) Well BZ19-6-1, 4 052 m, crystal internal micro-fracture, orthogonal optical light; (l) Well BZ19-6-1, 4167 m, multi-stage fractures cutting each other, plane polarized light.