Development techniques of horizontal wells in low permeability reservoirs, Jilin Oilfield

Aimed at the development situation for horizontal wells in low permeability reservoirs in the Jilin Oilfield, evaluation standards are established for the geological parameters of horizontal well adaptability in low permeability reservoirs. According to different permeability grade, eight blocks of two kinds, suitable for the development with horizontal wells, were selected. Take M block, N block, and E block as examples of reservoir development with horizontal wells. Five aspects, including fine geological description, parameter optimization of reservoir engineering, optimization of production and injection program, horizontal well trajectory control, and energy supplement are researched on horizontal well reservoir engineering optimization design. Reservoir engineering design parameters adapting to geologic characteristics of the Jilin Oilfield are given and a series of horizontal well development techniques is formed. Different energy supplement programs in N block are researched by Eclipse numerical simulation software. The cumulative production of horizontal well reaches the peak when water injection in vertical well is in the toe of horizontal well. The horizontal well application result in M block shows that the cumulative production of horizontal well is 2.5 times that of vertical Well 130-6 of the same period.