The LWD density logging was influenced by several factors such as bore size,stand off between logging tool and borehole wall,mud density,mud cake,cuttings,water cushion and mud invasion.

• 水平井随钻过程中的密度测井要受井眼尺寸、仪器和井壁的间隙、泥浆比重(含氢量)、泥饼、岩屑、水垫、泥浆侵入等环境影响。