塔里木盆地寒武系碳酸盐岩层序地层特征  

Sequence stratigraphic features of the Cambrian carbonate rocks in the Tarim Basin

作　　者：肖朝晖[1,2] 王招明[2] 姜仁旗 吴金才 张丽娟[2] 

机构地区：[1]成都理工大学资源学院,四川成都610059 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000 [3]吉斯克能源技术(北京)有限公司,北京100101

出　　处：《石油与天然气地质》2011年第1期1-10,16,共11页Oil & Gas Geology

摘　　要：运用碳酸盐岩层序地层学理论,通过野外露头观察、钻井资料分析及地震剖面综合解释技术,开展塔里木盆地下古生界碳酸盐岩层序地层研究,识别层序边界,建立地层格架。对塔里木盆地寒武系碳酸盐岩识别出的8个层序特征进行刻画,除层序SQ1为基准面上升半旋回型层序外,其他层序均为基准面下降半旋回型层序,其中层序SQ5,SQ6,SQ7,SQ8为重点勘探层序。在轮南地区,层序SQ6,SQ7,SQ8为今后构造-岩性复合圈闭重点勘探层序。建立了塔里木盆地寒武系碳酸盐岩层序发育模式,指出了有利于碳酸盐岩储层发育的层序样式,为寻找地层-岩性圈闭发育有利部位提供了依据。Sequence stratigraphic theories of carbonate are employed in a sequence stratigraphic study on the Lower Paleozoic carbonates in Tarim Basin through outcrop observation, drilling data analysis as well as integra- ted seismic interpretations. Together with the study, the sequence boundaries are identified and stratigraphic framework is established. As a result, eight sequences identified in the Cambrian carbonates are described. Ex- cept for sequence 1 （SQ 1 ） as a ascending base level semi-cycle sequence, the other sequences are all falling base level semi-cycle sequences. Sequences 5, 6, 7 and 8 are considered key hydrocarbon exploration targets. In Lunnan area, exploration activities shall be focused on sequences 6, 7 and 8 for complex structural-lithologic traps. A model for the Cambrian carbonate sequences in the Tarim Basin is developed and provides helpful aid to searching for places with favorable conditions for the formation of stratigraphic lithologic traps.

关 键 词：层序识别 碳酸盐岩 寒武系 轮南地区 塔里木盆地 

分 类 号：TE121.3[石油与天然气工程—油气勘探]