塔河南部盐下地区奥陶系裂缝发育期次研究  

Study on the Developing Stage of Ordovician Fractures in Tahe Southern Subsalt Area

作　　者：姚城[1] 何志强[1] 何洧 刘亿[1] 肖龙鑫[1,2] 

机构地区：[1]成都理工大学能源学院,成都610059 [2]西南石油物探大队,四川德阳618000

出　　处：《重庆科技学院学报（自然科学版）》2013年第1期9-11,30,共4页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家重大专项(2008ZX05005-002-008HZ)

摘　　要：沿缝溶蚀孔洞型储层是塔河南部盐下地区奥陶系地层主要发育的储层之一,裂缝对该类储层的形成有着重要的意义。研究区内裂缝现象广泛发育,但其发育期次的划分还比较混乱。依据裂缝岩相学特征,结合裂缝内充填物碳氧稳定同位素特征,可将裂缝分为5期,并对各期次裂缝的特征进行分析比较。研究结果表明,第Ⅲ期裂缝和第Ⅳ期裂缝对岩溶储层有良好的控制作用。Carst reservoir along the fracture is one of the reservoirs mainly developed in the Ordovician strata in the Tahe southern subsalt area,and the fracture has an important significance to that type of reservoir. Fracture is wide- spread in the study area, but the developing order of fractures is still quite unclear. Based on petrographic character- istic of fractures,combined with carbon and oxygen stable isotope characteristics of the fillings, fractures can be di- vided into five stages, and every stages of fractures are analyzed and compared. The results of the study show that the third and the fourth have a good control to carst reservoir.

关 键 词：裂缝发育期次 岩相学特征 碳氧稳定同位素 塔河南部盐下地区 

分 类 号：P618[天文地球—矿床学]