龙门山中段前缘金马-聚源地区雷四上亚段储集岩埋藏溶蚀特征  

Characteristics of Burial Dissolusion of Reservoir Rock of the Upper Sub-Member of the Member 4 of the Leikoupo Formation in the Jinma-Juyuan Region

作　　者：刘昊年[1] 

机构地区：[1]中国石化西南油气分公司勘探开发研究院,成都610081

出　　处：《四川地质学报》2017年第2期265-267,共3页Acta Geologica Sichuan

摘　　要：龙门山中段前缘金马-聚源地区雷口坡组四段上亚段的碳酸盐岩储集岩溶蚀作用极为发育,具多类型、多期次的特征。区内溶蚀作用主要包括古表生淡水溶蚀、有机酸溶蚀和热液溶蚀等类型,可分为浅埋藏、表生-再埋藏和深埋藏等三个阶段。浅埋藏和表生-再埋藏溶蚀阶段,以大气水和有机酸对组构的非选择性溶蚀为特征;深埋藏溶蚀阶段,以热液的选择性溶蚀为特征(伴以有机酸非选择性溶蚀),溶蚀作用多沿缝分布,伴生萤石、高温石英、天青石、闪锌矿和黄铁矿等热液矿物。白云石化作用形成的晶间孔、压溶作用和构造作用形成的微裂缝为酸性流体和热液的运移提供了通道。Dissolution is well developed in carbonate reservoir of the Upper Sub-Member of the Member 4 of the Leikoupo Formation. The Dissolution were developed in three stages such as shallow buried, supergene buried and deep buried stages. The former two stages are characterized by nonselective dissolution of meteoric water and organic acid, while the third stage by selective dissolution of hydrothermal solution which was responsible for fluorite, high temperature quartz, celestine, sphalerite and pyrite. Dolomitization resulted in formation of intergranular hole, while microfissures resulting from pressolution and tectonic action act as fluid conduit.

关 键 词：埋藏溶蚀 热液 成岩作用 龙门山 雷口坡组 

分 类 号：P618.13[天文地球—矿床学]