Application of multi-lateral horizontal well drilling technique on Well Yuping-8

To improve the heavy oil recovery of Lukexin Oilfield and decrease the composite development cost by horizontal well, and to realize oilfield highly efficient and economical development, a multi-lateral horizontal well was deployed in Tuha field, Well Yuping-8. During the drilling process of the well, some technical difficulties were encountered, such as poor drillability of the formation, pending horizontal section sidetracking, original hole reentry, etc. Based on the analysis on the above difficulties, some corresponding techniques were used, like power drilling tool optimization and horizontal section pending sidetrack technique, and some techniques were improved, like advance drilling method of lateral well and original hole reentry by lateral well hole. As a result, the drilling period was effectively shortened, and the drilling safety and rate were guaranteed. The smooth drilling of Well Yuping-8 supplies a novel method for enlarge area control of heavy oil formation by drilling multi-lateral horizontal wells and greatly increase oil rate and oil recovery.