地质与勘探2017，Vol.53Issue(4)：807-817,11.
鄂尔多斯盆地华庆地区长63储层成藏期孔隙度定量演化及致密成因机理
Quantitative Calculation of Porosity Evolution and Formation Mechanism of Tight Sandstone in the Chang 63 Reservoirs of the Huaqing Area, Ordos Basin
摘要
Abstract
Previous studies considered that Chang 63 tight sandstone formation of the Huaqing area in Ordos Basin formed in a delta front and semi-deep lake stable sedimentary setting.According to the characteristics of diagenetic evolution or the comprehensive geological effects of clastic reservoirs,we established the simulation equation corresponding to the porosity.We applied the casting thin sections and scan electron microscope to describe rock mineral components and porosity types.We used granularity images to show structural characteristics and sorting features of the clastic particles.Based on sedimentary microfacies,well logging,normal physical characteristics and depth analysis we inferred the depositional environment,buried depth and physical characteristics.Simultaneously we used the paleotemnperture,vitrinite reflectance,the highest pyrolysis temperature and clay minerals to study the diagenesis,porosity evolution and relatively high permeability formation.In combination with burial history and paleo-geotherm,we studied the formation mnechanism of tight sandstone reservoirs.This study suggested that the target layers are attributed to compaction and reform type in diagenesis.Differentiated diagenetic evolution is the root cause that led to different physical properties and porosity structures of the reservoirs.关键词
致密砂岩/成岩作用/孔隙度/定量演化/长63储层/华庆地区/鄂尔多斯盆地Key words
tight sandstone/diagenesis/porosity/quantitative evolution/Chang 63 reservoir/Huaqing area/Ordos basin分类
能源科技引用本文复制引用
张茜,孙卫,任大忠..鄂尔多斯盆地华庆地区长63储层成藏期孔隙度定量演化及致密成因机理[J].地质与勘探,2017,53(4):807-817,11.基金项目
国家科技重大专项大型油气田及煤层气开发(编号2011ZX05044),陕西省科技统筹创新工程(编号2011KTZB01-04-01)和中国博士后科学基金(编号2015M582699)联合资助. （编号2011ZX05044）
