济阳坳陷深层砂岩储层成岩作用及其阶段划分

在对大量薄片进行分析鉴定的基础上，运用扫描电镜、阴极发光和Ｘ衍射粘土分析等手段，对济阳坳陷深层砂岩储层的成岩作用、成岩序列进行了研究，总结出９种成岩标志、７种成岩事件以及５种成岩相类型．根据有机质的演化及粘土矿物的变化序列，对济阳坳陷深层砂岩成岩作用阶段进行了划分。由深层砂岩储层的成岩作用及孔隙演化规律认识到，济阳坳陷深层存在着较为有利的次生孔隙发育带．

DIAGENESIS OF DEEP SANDSTONE RESERVOIR AND THE STAGE DIVIDING IN JIYANG DEPRESSION

Jiyang depression is one of the most prolific hydrocarbon area in China. More than 120 thin sections were analyzed by standard petrographic microscope. X-ray diffraction, scanning electron microscope coupled energy-dispersive analysis and cathodoluminescence were used to analyze the selected samples. Examination of the Eocene sandstone cores from more than 180 meters reveals a complex diagenetic history. Diagenetic complexityshows the depositional environment and burial and thermal history of the depression. Diagenesis and the diagenesis order of the deep sandstone reservoir in Jiyang depression are studied. There are nine diagenetic identifications, seven kinds of diagenetic event and five types of diasenetic facies. The evolution of organic maturation and the sequence of clay mineral show that there are two stages of diagenetic evolution. The deep sandstone would be well-developed secondary pore zones..