1996年1月18日12时,我国陆上第一口设计井深最深、施工难度最大、水平井段最长的水平井——塔中水平4井,在塔里木探区钻成。该井是塔指在塔中四油田布的第四口重点开发水平井,由塔里木胜利钻井公司总承包。该井斜深4 318米,垂深3 582米,井斜92.4度,方位142.5度,纵距0.00米,横距9.42米,靶心距9.42米,水平段长600.6米。该井1995年9月20日18时一开,历时120天18小时,全井比计划周期提前30天完钻,600.6米的水平井段仅用30天20小时,中靶精度、钻井速度等技术指标均 At 12 o’clock on January 18, 1996, the first well on the land in China was the deepest in design and the most difficult in construction. The horizontal well with the longest horizontal horizontal well, Tajhong Middle Level 4, was drilled into the Tarim exploration area. The well is a tower that refers to the fourth well-tapped horizontal well in Taizhong IV field cloth, which is contracted by Tarim Victory Drilling Company. The well is 4,312 meters deep and 3,582 meters deep, with a well inclination of 92.4 degrees and an orientation of 142.5 degrees. The vertical distance is 0.00 meters, the horizontal distance is 9.42 meters, the target distance is 9.42 meters, and the horizontal section is 600.6 meters long. The well opened at 1800 hours on September 20, 1995 and lasted 120 days and 18 hours. The whole well was drilled 30 days earlier than the planned period. The 600.6 meters of horizontal well bore only 30 days and 20 hours, and the target accuracy, drilling speed, etc. Technical indicators are