中文摘要：

地下水封油库作为国家的石油战略储备库,对库址区水文地质工程地质条件要求较高。然而,在实际的场区中,总是存在着各种不良地质体,直接影响着库址区的水文地质工程地质条件。本文以锦州地下水封油库为例,对地下水封油库场区膨胀性蚀变岩进行工程地质分析。场区的蚀变岩属中基性岩脉侵入的热液蚀变型,具有弱膨胀性。通过崩解试验,发现该蚀变岩具有一定的崩解性。通过岩矿薄片鉴定和X射线衍射分析,发现黏土矿物为蒙脱石。根据膨胀性蚀变岩的性质,地下油库在膨胀性蚀变岩段施工时应采取相应的治理措施。

英文摘要：

As petroleum strategic storages,unlined caverns for storage of oil need suitable hydrogeologic and engineering geological conditions.However,there are many bad geological bodies in the storage regions.They directly influence the hydrogeologic and engineering geological conditions in storage regions.In the paper,Jinzhou underground oil storages is considered as an example to analyze the altered rocks with expansibility in underground oil storages.There are many altered rocks in the region,and they belong to hydrothermal alteration by intrusion of basic dykes.The altered rocks have weak expansibility.It is found by disintegration test that the altered rocks can disintegrate.Through identification of minerals and rocks and X-ray diffraction analysis,it is found that clay mineral of the altered rocks is smectite.According to properties of the altered rocks with expansibility,the paper present control measures in the altered rock section during the construction of underground caverns for storage of oil.