Abstract
Summary H6 buried hill reservoir in Huizhou depression of Pearl River Mouth Basin is the first commercial buried hill oil and gas discovery in Pearl River Mouth Basin, opening a new exploration field in this area. Based on the systematic analysis of the diagenesis, mountain building and reservoir forming and hydrocarbon accumulation characteristics of Huizhou H6 buried hill oil and gas reservoir, it is pointed out that the basin basement experienced tectonic evolution of continental margin magmatic arc in Mesozoic and was formed by “composite volcanic rock and deep intrusive rock” compound magmatic rock. It is clear that the H6 buried hill has the characteristics of double-layer zoning structure vertically, and the reservoir quality is controlled by the multi-stage development of pre-existing faults, the influence of dominant minerals and fluid dissolution transformation. Huizhou H6 reservoir has the characteristics of “wide contacting area, intensive hydrocarbon charging, three-dimensional reticular transporting and compound lithology overlapped top-sealing”. The research results provide effective guidance for further buried hill oil and gas exploration in the Pearl River Mouth Basin, and key significant guiding for buried hill exploration in other regions.
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