HORIZONTAL WELL DRILLING TECHNOLOGY IN WELL YUN2-PING1

Strip fault-block reservoirs exist in Block Yun2, and the geological condition is complex, e.g., multiple inter-beds, active edge water, and high productivity. To improve the development efficiency in this block, a horizontal well, Yun2-Ping1 was drilled. It was the first medium radius horizontal well in Zhongyuan Oilfield, with a wellbore profile of vertical-building-building-building-horizontal, and an azimuth of 31.7°was required in the horizontal section. Well configuration of three target points was selected, and MMH polymer drilling fluid was used during drilling. Double-bow casing centralizer and elastic float collar were used in completion of this well, and drill pipe conveying MWD horizontal well logging technology was applied. By fully use of the geo-steering technology, and strictly control of the well trajectory, this horizontal well was successfully drilled.