黄骅坳陷沧东凹陷孔二段成岩作用特征及定量评价

通过大量普通薄片、铸体薄片、扫描电镜、阴极发光及X-衍射等的观察和分析，明确了黄骅凹陷沧 东凹陷不同构造单元孔二段储层的主要成岩作用特征：南皮斜坡为中-强压实、中胶结和强溶蚀，黏土薄 膜有利于抑制石英的次生加大，保护了原生孔和次生溶孔；舍女寺断鼻带为中压实、弱胶结和强溶蚀；孔 店构造带为弱压实、中胶结和弱溶蚀。成岩评价表明，压实作用、胶结作用和溶蚀作用造成孔二段储层孔 隙度的变化分别为-26.1%，-4.3% 和6%，溶蚀作用是重要的建设性成岩作用。

Diagenesis and its quantitative evaluation of the second member of Kongdian Formation in Cangdong Sag,Huanghua Depression

Based on systematic observation of normal and cast thin section, scanning electronic microscope, cathodoluminescene and analysis of X-ray, the characteristics of main diagenesis of the second member of Kongdian Formation in Cangdong Sag were analyzed. The result shows that it is of medium-strong compaction, medium cementation and strong dissolution in Nanpi slope, where clay coats can restrain the quartz enlargement and protect the primary and secondary dissolved pores. Shenvsi fault-nose is characterized by medium compaction, low cementation and strong dissolution. Kongdian tectonic zone is characterized by low compaction, medium cementation and low dissolution. The quantitative analysis of diagenesis shows that compaction, cementation and dissolution can cause -26.1%, -4.3% and 6.0% of porosity fluctuations respectively, and dissolution is important constructive diagenesis.