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在砂岩油田，注入井用大量聚合物凝胶进行处理可以提高注水的扫油效率。截止目前已经增采原油8×104bbl,每桶成本仅增加1美元。
In sandstone fields, injection wells are treated with a large number of polymer gels to improve the sweep efficiency of water injection. As of now, crude oil has been increased 8 × 104bbl, the cost per barrel increased by only 1 US dollar.