河北省牛驮镇地热田钻探工艺

Drilling Technology for Niutuozhen Geothermal Field in Hebei

摘要:

河北省牛驮镇地热田地热地质条件为华北地区最好，开发20多年来，设备能力逐渐加强，管材由水文水井系列过渡到石油API系列，钻探工艺逐步发展。随着地下热水的开采，水位下降，储层的压力下降很多，在刚钻开基岩风化壳时出现了因泥浆骤然漏失而造成上部松散层坍塌的问题。针对这一施工难点问题，对钻进及成井工艺进行了改进。

Abstract:

Niutouzhen geothermal field is with the best geothermal geological condition in North China, pipe equipment was transitioned from hydrological well series to API series. But the groundwater and the reservoir pressure lowered with the continuous exploitation of geothermal groundwater, and upper loose layer collapsing occurred while drilling in base rock weathering crust. According to this construction difficulty, improvement was made on drilling and well completion technology.