Horizontal Well with Stinger Completion for Delaying Bottom Water Coning

Pressure drop along horizontal well causes unequal draw down along the well, thus reducing the effectiveness of the toe of the well, and increasing the tendency for water and gas coning at the heel. Completion has been proposed to combat this effect using a stinger that extends from the heel into the horizontal section. This reduces the magnitude of the pressure drop over the well bore, because the well is effectively split in two segments of reduced length. Based on the model of the single phase pressure drop calculation in horizontal well bore and infiltrating fluid in reservoir, the model of the reservoir flow and well bore couple flow was established, and numerical solution was given. By the analysis of the examples of stinger completion technology in a Chinese offshore oil field, the average water ratio of stinger completion was 47.4 percent lower than conventional completion oil well, the average daily oil production increase was 73.16 percent.