Predictive distribution of high-quality tight reservoirs of coarse clastic rocks by linking diagenesis to sedimentary facies: Evidence from the upper Sha 4 Member in the northern Bonan Sag, Bohai Bay Basin, eastern China
作者： Dong Wu , Xiantai Liu , Yushan Du , Long Jiang , Ziyan Cheng
关键词: Petrography 、 Bohai bay 、 Geology 、 Clastic rock 、 Structural basin 、 Lithology 、 Geochemistry 、 Facies 、 Diagenesis 、 Sedimentary rock
摘要: AbstractCoarse clastic rocks of the upper Sha 4 Member in northern Bonan Sag Bohai Bay Basin eastern China are important hydrocarbon reservoirs. The deposits tight reservoirs owing to low porosity (less than 10%) and permeability 1 mD). Because strong heterogeneity, although reserve is remarkable, only 4.9% reserves recovered. We have studied these by linking diagenesis sedimentary facies help predict distribution high-quality Petrographic analysis undertaken based on cores, thin sections, X-ray diffraction scanning electron microscope, helpful understand impacts factors factors. Sedimentary microfacies, lithologic characteristics, reservoir property, diagenesis, diagenetic minerals studied. Coarse deposited mainly nearshore subaqueous fans fan deltas. multistage sandstones a...
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