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成岩研究表明 ,区内蓬莱镇组储层经历了压实作用、胶结作用和溶蚀作用 ;储层经过一系列成岩作用改造后 ,进油期的孔隙度平均为 1 2 %～ 1 4% ,主要为剩余粒间孔 ,粒内溶孔、粒间溶孔、铸模、溶缝、胶结物内溶孔。储层质量的成岩控因研究表明 ,随着压实强度的增加 ,方解石、石膏等胶结作用的增强 ,储层孔隙度呈线性降低 ;但随着溶蚀程度的增加 ,储层孔隙度明显提高。
Diagenesis studies show that the reservoirs in Penglaizhen Formation experienced compaction, cementation and dissolution. After a series of diagenetic alterations, the porosity of oil reservoirs averaged 12% ~ 14%, mainly For the remaining intergranular pores, intragranular dissolved pores, intergranular dissolved pores, mold, dissolved joints, cement dissolved pores. The study on the diagenetic control of reservoir quality shows that the porosity of reservoir decreases linearly with the increase of compaction strength and the cementation of gypsum and gypsum, but the porosity of reservoir increases obviously with the increase of dissolution degree.