中国陆上最深钻井——塔参1井的地层剖面及讨论

STRATIGRAPHIC SECTION AND SOME DISCUSSIONS OF DRILLING WELL TACAN 1: THE DEEPEST WELL ON-LAND IN CHINA

塔参 1井是塔里木盆地腹地的一口探井 ,井深 72 0 0m ,是目前我国陆上最深的钻井。其揭露的地层包括 (自上而下 ) :第四系、第三系 (未分 )、白垩系、三叠系、二叠系、石炭系、泥盆系、志留系、奥陶系、寒武系和前寒武纪花岗闪长岩及其中的闪长岩捕虏体。该井钻遇的地层较齐全 ,取心系统 ,是地质研究中不可多得的珍贵资料。本文较系统地介绍了塔参 1井所揭露的地层剖面 。

The drilling well of Tacan No.1 (for short, TC1) was an exploration well in the central part of the Tarim Basin, NW China. It was the deepest well on shore in China so far, which met the following strata (in descending order): Quaternary, Tertiary, Cretaceous, Triassic, Permian, Carboniferous, Devonian, Silurian, Ordovician, Cambrian and the Precambrian granodiorite with diorite xenoliths. The stratigraphic succession revealed by TC1 was comparatively complete with systematic core extraction. It was very precious for geological study. This paper systematically illustrated the stratigraphic succession of TC1, and some problems, such as the Precambrian igneous activities, the strata of Middle Ordovician and the Caledonian orogeny, were discussed preliminarily.