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彩南油田三工河组油藏边底水活跃，天然能量较充足，并且油藏与边底水的连通性好、油层渗透率较高、油水粘度比低、导压系数高、边底水补充快，因此，适合于长期利用天然能量开发。文章介绍如何根据不同区块的不同特点，确定合理的注水时机、注水部位及合理的采油速度，最大限度地利用天然能量，以最少的注水井数和注水量来满足高速开发的需要，使整个油藏连续五年以２９％～３４％的采油速度高速开发，实现油田低中含水期稳产和获取较高采收率的目标，取得了较好的经济效益。
The Sangonghe Formation in the Cainan Oilfield has active edge and bottom water, abundant natural energy, good connectivity between the reservoir and the edge water, high oil permeability, low oil-water viscosity ratio, high pressure-bearing coefficient, Replenishing fast, therefore, suitable for long-term use of natural energy development. This article describes how to determine the reasonable timing of waterflooding, waterflooding site and reasonable oil recovery rate according to the different characteristics of different blocks, making maximum use of natural energy, meeting the needs of high-speed development with minimum number of water injection wells and water injection, The reservoir has been developed at a high speed of 29% ~ 34% for five consecutive years, realizing the goal of stable production and high recovery of oil in the low-middle water-cut period of the oilfield, and achieved good economic benefits.