Coupling between tectonic activity and diagenetic evolution of a clastic buried hill—a case study from Gubei low buried hill in Jiyang Depression of Bohai Bay Basin

Abstract This paper aims to gain new insights into clastic buried hill reservoirs. For this purpose, the Permian sandstone reservoirs in Upper Shihezi Formation, Gubei low hill, Jiyang Depression, was taken as object. Referring evolution histories of and tectonics, diagenesis its coupling with tectonic activity were investigated, aid techniques like core observation, casting sheet scanning electron microscopy (SEM), cathode luminescence, probe, back scattering, fluid inclusion, pore permeability tests. The results show that are low-porosity, low-permeability complex diagenesis. diagenetic sequence can be summarized early feldspar corrosion/kaolinite cemention/early pyrite cemention→carbonate cemention/secondary enlargement quartz→quartz corrosion/corrosion quartz secondary enlargement→late calcite cemention→late cemention/carbonate corrosion/late dissolvable miscellaneous matrix; compaction effect exists throughout process. went through (I) shallow burial epidiagenesis, (II) near-surface hydrothermal diagenesis, (III) deep alkaline (IV) continuous acid these four stages is significantly affected by activities, article lists evidence activity. research lay basis for prediction evaluation shed light on exploration tight