摘要
该文分析了胜坨油田注水井吸水能力降低的主要原因是黄河水与地层污水混注时，地层水中的Ｓｒ２＋、Ｂａ２＋与黄河水中的ＳＯ２－４反应生成ＢａＳＯ４、ＳｒＳＯ４沉淀。通过试验研究，得出胜坨油田吸水指数的阶段性变化与注水水质的阶段性变化一致的规律。指出要从根本上解决胜坨油田吸水指数变化的问题，必须加强注水管理、提高注水水质、杜绝黄河水与油层污水混注。
This paper analyzes that the main reason of low injectivity of water injection wells is that the Sr 2+ in formation water reacts with the SO 4 2- in the Yellow River water to produce precipitate of BaSO 4 when the Yellow River water mixes with formation water. Through experimental researches, a result is obtained, which is that the periodic variation of water injectivity index is consistent with the periodic variation of injection water quantity in Shengtuo oilfield. Therefore, this paper points out that in order to solve thoroughly the problem that the water injectivity index varies in Shengtuo oilfield, the water injection management must be strengthen, the water quality should be improved and the Yellow River water must be prohibited from mixing with reservoir water.
关键词
注水井
水质
吸水能力
注水开发
油田
injection water quality, water injectivity index, oil content suspended substance
