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着重介绍了如何根据油藏地质特征和开采过程中对油、水运动规律的认识,有针对性地综合运用天然水驱、封隔边底水、适时加密井网、注CDG凝胶调驱等多项技术,使彩南油田三工河组油藏的稳产期较方案设计延长一倍,平均以3.5%的采油速度高速稳产可达10年以上,稳产期平均含水上升率可控制在1.4%以下,油藏的最终采收率由原方案设计的35%可提高至60%以上,不仅大幅度增加了可采储量,而且经济效益十分显著。
This paper mainly introduced how to comprehensively use the natural water flooding, sealing the bottom water, timely filling the well pattern, injecting the CDG gel to control the flooding and so on according to the geological characteristics of the reservoir and the understanding of the law of oil and water movement in the mining process. A number of technologies have made it possible to double the stable production period of the Sangonghe Formation reservoir in Cainan oilfield compared with that of the planned design. The average production recovery rate of high-speed oil recovery of 3.5% can reach more than 10 years and the average water-cut rate of stable production can be controlled at 1.4% In the following, the ultimate recovery rate of the reservoir can be increased from 35% of the original design to over 60%, not only greatly increasing the recoverable reserves but also having significant economic benefits.