Application of horizontal well technology in the development ofmarginal oilfield in Bohai Bay

Complex conditions of geological reservoirs, many medium and small marginal oilfield and heavy viscous crude oil as the mostly produced in Bohai Bay lead to such phenomena in Bohai oilfield as big difficulty in the development and low single well production. Therefore,optimized and fast drilling and horizontal well completion technology is put forward,the outstanding advantages and key technology needed in horizontal development are researched. Lvda 4-2 oilfield, as typical marginal oilfield, makes full use of many technologies such as horizontal well drilling, unconsolidated sandstone protection, moderate sand control, discharging fluid and putting into production by pressure difference control, and so on, achieving the goal of high and stable yield in oilfield, which have widely promotion and application in other marginal oil and gas fields in Bohai Bay.