When horizontal section is short, the water coning is formed in a short time, the two shoulders of the coning are steep and the oil/water interface deforms greatly.

• 采用水平井开发时，由于水平段较长，油藏内井筒附近生产压差较小，底水形成水脊，水脊脊进速度慢，见水时间推迟，提高了无水期产油量。