辽河拗陷东部凹陷古近系碎屑岩储层成岩控因  

The effects of diagenesis on the Palaeogene reservoir of the eastern sag of Liaohe Basin

作　　者：樊爱萍[1] 杨仁超[1] 韩作振[1] 蔡国刚[2] 李春华[2] 徐学蓓[1] 

机构地区：[1]山东科技大学地质科学与工程学院,山东青岛266510 [2]辽河油田公司勘探开发研究院,辽宁盘锦124010

出　　处：《西北大学学报（自然科学版）》2009年第1期92-96,共5页Journal of Northwest University（Natural Science Edition）

基　　金：山东省高校沉积成矿作用与沉积矿产重点实验室(山东科技大学)基金资助项目(DMSM200803)

摘　　要：目的分析成岩作用对辽河拗陷东部凹陷古近纪碎屑岩储层的控制作用。方法在岩心观察和资料调研的基础上,结合薄片鉴定、电镜扫描、X射线衍射、阴极发光、压汞、铸体等分析手段,对砂岩的成岩作用和孔隙特征进行分析。结果压实作用是导致储层孔隙度减少的主要因素之一;溶蚀作用和破裂作用,尤其是溶蚀作用对该区砂岩孔隙度的改善作用比较显著;胶结作用对储层的改造具有双重性质,浅埋阶段形成的胶结物在一定程度上抑制了后期的压实压溶作用,而深埋阶段形成的胶结物,堵塞孔隙,降低孔隙度,致使储层物性变差。结论成岩作用明显地控制了辽河拗陷东部凹陷古近系碎屑岩储层的性质。Aim To analyze the diagenesis controlling on the Palaeogene reservoir of the eastern sag of Liaohe Basin. Methods Based on field exploration and information collection, diagenesis and porosity character of sandstone were analyzed by slice identification, scanning electron microscope, X-ray diffraction, cathodoluminescence, mercury penetration, moldic pore, etc. Results Compaction was the one of the factors reducing porosity, dissolution and fracture ,especially dissolution obviously increased porosity; cementation has double effects, compaction of the later diagenetic stage material was restrained by the cement of the early diagenetic stage, and porosity was decreased for cement of the later diagenetic stage playing pore. Conclusion The reservoir quality was obviously controlled by diagenesis.

关 键 词：东部凹陷 储层 成岩作用 

分 类 号：P588.2[天文地球—岩石学]