Geological conditions, reservoir evolution and favorable exploration directions of marine ultra-deep oil and gas in China

LI Jianzhong,TAO Xiaowan,BAI Bin,HUANG Shipeng,JIANG Qingchun,ZHAO Zhenyu,CHEN Yanyan,MA Debo,ZHANG Liping,LI Ningxi,SONG Wei

Fig. 4. Morphology of different types of hydrocarbon inclusions and microscopic fluorescence spectrum wavelengths of two phases of oil inclusions in the Dengying Formation of the Anyue gas field. (a) Well Moxi 21, Deng 4 Member, 5051.52-5051.67 m, micrite dolomite, with gas, bitumen-containing and bitumen inclusions, plane polarized light; (b) Well Moxi 21, Deng 4 Member, 5051.52-5051.67 m, micrite dolomite, with bitumen and gas inclusions, as well as bitumen-containing inclusions without fluorescence, UV-excited fluorescence photographs; (c) Well Gaoshi 18, Deng 4 Member, 5138.89-5139.10 m, dolomite, oil inclusions, plane-polarized light; (d) Well Gaoshi 18, Deng 4 Member, 5138.89-5139.10 m, dolomite, oil inclusions with bright blue fluorescence, UV-excited fluorescence photographs; (e) Well Gaoshi 18, microscopic fluorescence spectrum wavelength of two phases of oil inclusions in the Dengying Formation.