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

作　　者：罗冰[1] 谭秀成[1] 刘宏[1] 李凌[1] 夏吉文[2] 邹娟[3] 海涛 

机构地区：[1]西南石油大学资源与环境学院,成都610500 [2]西南油气田分公司蜀南气矿,四川泸州646001 [3]西南油气田分公司川西北气矿,四川江油621700 [4]中国石油化工集团西北局采油二厂,新疆轮台841604

出　　处：《沉积学报》2009年第3期404-409,共6页Acta Sedimentologica Sinica

基　　金：中国石油天然气集团公司2006年度石油科技中青年创新基金项目(06E1018)“碳酸盐岩同生岩溶型储层发育规律及预测模型研究”;“四川省重点学科建设项目(SZD0414)”资助

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。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.

关 键 词：成因机制 储层 鲕粒滩 飞仙关组 蜀南地区 

分 类 号：P588.2[天文地球—岩石学] TE122.2[天文地球—地质学]