The Relationship between Chlorite and Reservoir Quality in the Huagang Formation, Xihu Depression, China
نویسندگان
چکیده
Low permeability tight gas resources account for 90% of the Xihu Sag. Under background extensive development low and reservoirs, key to economic effective is find sweet reservoir formation. To clarify origin distribution a in study area, it important formation evolution mechanisms chlorite. In this study, based on analysis thin section, X-ray diffraction SEM, through factors authigenic chlorite Huagang Formation middle north central inversion structural belt, we reasoned process whole life cycle. According sedimentary diagenetic response characteristics chlorite, two types favorable facies belts are identified. The results showed that pore-lined natural advantage reservoirs East China Sea. Chlorite formed under joint action three factors: source iron magnesium ions, alkaline environment early stage open fluid field. After spots developed protection four mechanisms: inhibiting quartz cementation, enhancing compression resistance, protecting macropore throat primary pores, promoting secondary intergranular dissolved pores. When content pore lining high (relative > 35%), thickness moderate (4–10 μm). A degree wrapping good crystallization conducive preservation spots.
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ژورنال
عنوان ژورنال: Energies
سال: 2022
ISSN: ['1996-1073']
DOI: https://doi.org/10.3390/en15093438