摘要
在岩石学研究的基础上,应用阴极发光、稳定同位素、微量元素、x-射线衍射、扫描电镜及矿物包裹体等综合技术,对鄂尔多斯盆地东部下奥陶统的成岩作用、成岩环境、成岩序列、埋藏史及孔隙演化史作了详细而系统的研究。下奥陶统经历了长期而复杂的成岩后生变化历史,既受近地表、浅埋藏成岩环境的明显影响,又受表生、深埋成岩环境的强烈改造。孔隙演化史极为复杂,主要受白云岩化、古岩溶和深部溶解作用的控制。其中,表生环境中的古岩溶和深埋环境中的深部溶解作用是形成有效储集空间最重要的因素。
Based on the petrology study, using new technologies of cathodoluminescence, stable isotopes of oxygen and carbon, x-ray diffraction, trace element analysis, scanning electron microscopy, and mineral inclusion identification, the diagenesis, diagenetic environment, diagenetic sequence, burial and porosity evolution history of Lower Ordovician carbonate rocks in the eastern Ordos basin have been studied in detail. This stuffy shows that the Lower Ordoviclan rocks had undergone a long-term and complex diagenetic history, they were strongly effected by both near-surface, shallow-burial and deep-burial and exodiagenetic environment. The history of porosity evolution is also very complex. It is mainly controlled by dolomitization, paleokarst and dissolution under deep-burial environment, especially the later two being of which the most important factors forming effective porosity in the oil and gas accumulative stage.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1993年第3期91-102,共12页
Petroleum Exploration and Development
