风化壳对井楼油田套损的控制作用

The Casing Damage Controlled by Weathered Crust in Jinglou Oilfield

套损是油田中存在的普遍现象。从地质角度探讨井楼油田一区套损的控制因素。套损深度以及对应的地质层位研究表明,井楼油田一区套损发生在构造的高部位,套损点对应的层位为经过风化剥蚀作用形成的风化壳。从地质、测井、开发等多方面分析了该区风化壳的特点,认为风化壳对套损起控制作用,注入蒸汽窜入上覆风化壳形成"汽冒"是套损的触发条件。

Casing damage was common in oilfields. The control factors of casing damage were discussed though geology study. The statistics of depth and geology horizon of casing damage show that casing damage in Jinglou Oilfield happened in the high position of structure and the damage horizon was weathered crust. The characteristics of weathered crust were analyzed from the aspects of geology,well logging and development. it is considered that the casing damage is controlled by weathered crust and triggered by injected steam.