CAJ | 학술논문

油层结垢是常见的油层损害类型。以4个注水开发油田为例，采用数值模拟预测方法，对安塞油田长6油层的BaSO4结垢趋势和榆树林油田扶杨油层、头台油田扶余油层、鄯善油田三间房组油层的CaCO3结垢趋势进行研究。结果表明：①BaSO4结垢由不相容地层水和注入水的混合作用引起，其结垢趋势主要取决于成垢离子的含量，温度、压力变化影响很小；②CaCO3结垢由于温度、压力条件变化和（或）注入水与地层水混合作用而引起，不同油田温度、压力变化情况及注入水和地层水成垢离子含量不同，CaCO3 结垢趋势可能相差较大；③在由注水井到生产井的区域内，注水井和生产井的近井地带CaCO3结垢逐渐累积，结垢趋势较强，而油层内部结垢累积不明显；④CaCO3结垢可仅由于温度、压力条件变化而引起，CaCO3结垢变化规律的预测结果也适用于非注水开发油田。图2表4参9(贾红育摘)
유층결구시상견적유층손해류형。이4개주수개발유전위례，채용수치모의예측방법，대안새유전장6유층적BaSO4결구추세화유수림유전부양유층、두태유전부여유층、선선유전삼간방조유층적CaCO3결구추세진행연구。결과표명：①BaSO4결구유불상용지층수화주입수적혼합작용인기，기결구추세주요취결우성구리자적함량，온도、압력변화영향흔소；②CaCO3결구유우온도、압력조건변화화（혹）주입수여지층수혼합작용이인기，불동유전온도、압력변화정황급주입수화지층수성구리자함량불동，CaCO3 결구추세가능상차교대；③재유주수정도생산정적구역내，주수정화생산정적근정지대CaCO3결구축점루적，결구추세교강，이유층내부결구루적불명현；④CaCO3결구가부유우온도、압력조건변화이인기，CaCO3결구변화규률적예측결과야괄용우비주수개발유전。도2표4삼9(가홍육적)
Taking four oil fields as an example and adopting the method of computer prediction, the scaling tendency of BaSO4 and CaCO3 is studied respectively in this paper. The results show: ①BaSO4 scaling is caused by the mixing action of formation water and the incompatible injection water. The scaling tendency of BaSO4 is mainly determined by the content of scale-forming ions,the influence of temperature and pressure on the scaling tendency is very unremarkable; ②CaCO3 scaling is caused by changes of temperature and pressure or the changes and the mixing of formation water and injection water, the scaling tendency of CaCO3 is comprehensively affected by the changes and the content of scale-forming ions; ③Because of the differences of the changes and the content of scale-forming ions, the scaling tendency of oil fields is likely to be obviously different; ④In the region from injection well to production well, the CaCO3 scaling in the formation near injection well and production well is severer, while the scaling in the inner formation is milder.