热液作用对塔东地区寒武系碳酸盐岩储集层的影响  

Hydrothermal Process and Its Effect on Cambrian Carbonate Reservoirs in Tadong Area

作　　者：邵红梅[1,2] 卢曦[2] 李国蓉[3] 孟祥豪[3] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [3]成都理工大学能源学院,成都610059

出　　处：《新疆石油地质》2015年第3期277-282,共6页Xinjiang Petroleum Geology

基　　金：国家自然科学基金(41272150)

摘　　要：热液活动对塔东地区白云岩储集层的形成起着重要作用。综合应用岩石薄片显微镜鉴定、阴极发光分析、碳氧同位素分析、微量元素分析、稀土元素分析等技术,研究了热液地质作用对塔东地区寒武系白云岩储集层的影响,建立了热液作用的期次及其岩石矿物学和地球化学识别标志。对寒武系碳酸盐岩储集层具有改造意义的热液作用有两期,Ⅰ期热液作用发生在中-晚奥陶世,在寒武系白云岩中形成裂缝,而对泥灰岩层段改造较弱或未改造;Ⅱ期热液作用发生在二叠纪末,表现为研究区内广泛的热液溶蚀作用,形成寒武系重要的溶蚀缝洞型白云岩储集层。Hydrothermal activity played an important part in the formation of dolostone reservoirs in Tadong area（eastern Tarim basin）.Byapplying the technologies of rock thin section microscopic identification,cathodoluminescence analysis,carbon and oxygen isotope analy-sis,trace element,rare earth element analysis,etc,the hydrothermal process and formed Cambrian hydrothermal dolostone reservoirs in Ta-dong area were studied.There are two stages of hydrothermal processes with transformed effect significance on the Cambrian carbonate res-ervoirs,and corresponding rock mineralogical and geochemical identification marks of the two hydrothermal processes are established.TheStage-Ⅰhydrothermal process took place in the Middle-Late Ordovician,its transformed effect on the Early Cambrian consolidated dolomiteswas dominated by formation of fractures rather than on the Cambrian microcrystalline limestone,marl and mudstone intervals.The Stage-Ⅱhydrothermal process took place in late hercynian at the end of Permian,and its transformed effect created wide distribution of hydrother-mal dissolution and formed Cambrian important dissolution fractured-vuggy reservoirs in this area.

关 键 词：塔里木盆地 塔东地区 热液作用 热液溶蚀作用 热液成因白云岩 碳酸盐岩储集层 

分 类 号：TE112.221[石油与天然气工程—油气勘探]