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水平井技术是在直井、一般定向井技术基础上发展起来的一种特殊钻井技术。一般认为,钻开油气层井段的井斜角在86°以上,其水平段的长度为直井油气层厚度的几倍乃至几十倍的井叫做水平井。
Horizontal well technology is a special drilling technology developed on the basis of vertical well and general directional well technology. It is generally believed that the wellbore angle drilled in the oil and gas reservoir interval is above 86 ° and the length of the horizontal section is several times to several times the thickness of the vertical well and is called horizontal well.