Pilot test of horizontal drilling and completion techniques in Nanpu Oilfield

The main reservoir of Nanpu Oilfield has considerable lateral variation and uncertain stratigraphic dip and faults making its geological tracking difficult. Because of the environmental constraints, few wells were drilled and the implementation of efficient development level is difficult. After analyzing the stability of the well bores, pore pressure, fracture pressure, collapse pressure, drill ability of basalt, reservoir characteristics and physical properties, reservoir structure, characteristics of oil and gas shows, reservoir damage, and reservoir sand, optimization research and pilot applications of extended-reach horizontal drilling, including optimal design of well profile and structure, well path control, individualized design of bit, optimization of drilling fluid system, reservoir protection, and screen completion, were carried out. All the three horizontal wells tested were successful in oil production. The early daily oil production in the three wells is 505, 736, and 1058 t, respectively. The production was normal and no sand was produced in the case of high production. The main drilling and completion techniques established in this study proved to be efficient.