成都理工大学学报（自然科学版）2017，Vol.44Issue(6)：717-726,10.DOI:10.3969/j.issn.1671-9727.2017.06.09
鄂尔多斯盆地东南部上古生界储集砂岩的成岩作用
The diagenesis of Upper Paleozoic reservoir sandstones in the southeastern Ordos Basin
摘要
Abstract
Samples from the drilling cores are analyzed through the observation of conventional thin sections,casting thin sections and as well as by SEM and energy spectrum analysis so as to study the characteristics of Upper Paleozoic sandstone reservoir and the correlation of diagenesis and reservoirs in the southeast of Ordos Basin.It shows that intragranular dissolved pores,intergranular pores,intergranular dissolved pores,intercrystal pores and dissolved fissures develop in the reservoir sandstones,with the intragranular dissolved pores and intergranular dissolved pores as the major pore types.The study reveals that the diagenesis of sandstones includes compaction,dissolution,and formation of carbonate minerals,siliceous minerals and clay minerals.The correlation of sandstone composition and porosity indicates that compaction is an important factor leading to the worseness of porosity,while dissolution increases the porosity in the sandstone.The occurrence of carbonate minerals results in the decrease of porosity and siliceous minerals decrease the intergranular pores to some extent.The appearance of kaolin plays a limited role in the increment of porosity,while the occurrence of chlorite and hydrous mica is a disadvantage to the intercrystal pores.关键词
上古生界/成岩作用/储集砂岩/孔隙度/鄂尔多斯盆地Key words
Upper Paleozoic/diagenesis/reservoir/pore characteristics/Ordos Basin分类
天文与地球科学引用本文复制引用
陈灼华,向芳,王誉婉,刘一鸣..鄂尔多斯盆地东南部上古生界储集砂岩的成岩作用[J].成都理工大学学报（自然科学版）,2017,44(6):717-726,10.基金项目
国家自然科学基金项目(41572093,41072083) （41572093,41072083）
成都理工大学优秀创新团队培育计划项目(KYTD201703). （KYTD201703）
