蜀南地区飞仙关组鲕滩储层成因机制分析
Genetic Mechanism Analysis on Oolitic Reservoir of Lower Triassic Feixianguan Formation in the Shunan Area，Sichuan Basin
-
摘要: 对蜀南地区飞仙关组鲕滩储层的深入研究表明，飞仙关组鲕滩储层储集空间以大气淡水选择性溶蚀形成的铸模孔和粒内溶孔为主，储层发育在滩体中上部，具有明显的层位性。结合沉积期古地貌、海平面升降变化、古气候及成岩演化等储层控制因素分析认为，该区鲕滩储层为早期岩溶成因，早期大气淡水淋溶是针孔鲕粒灰岩储层形成的关键。海底古地貌高地鲕粒滩为储层的形成和发育提供了物质基础，决定了早期孔、渗层的时空分布规律；沉积期古地貌、海平面变化及古气候决定了早期岩溶的强度，控制了储层发育程度。埋藏溶蚀和构造破裂对储层具有一定的优化改造作用，但作用有限。Abstract: Through research on the oolitic reservoir of Feixianguan Formation in the Shunan Area，Sichuan Basin，it is indicated that the main reservoir spaces of oolitic reservoir are moldic pore and intragranular dissolved pore , which is formed by meteoric water leaching. The reservoir development in the upper part of Oolitic Beach, with obvious characteristics of separated layer stimulation. Combining the study of palaeogeomorphology, eustatic sea level change, palaeoclimate and diagenetic evolution, it is calculated that the mode of origin of oolitic reservoir is syngenetic karst, reservoir is formed by meteoric water leaching. Oolitic beach at the chapada of palaeogeomorphology provided material basis for the reservoir formation and evolution, and controlled the distribution of reservoir. Paleogeomorphology, eustatic sea level change and palaeoclimate determined the intensity of syngenetic karst, and dominated reservoir quality. Subjacent karst and tectonic disruption play a role in improving reservoir performance, but is limited in effect.
-
Key words:
- genetic mechanism /
- reservoir /
- oolitic beach /
- Feixianguan Formation /
- Shunan Area
-
点击查看大图
计量
- 文章访问数: 2230
- HTML全文浏览量: 8
- PDF下载量: 634
- 被引次数: 0
下载:
