- 责任者：Zhang Fengbo (Xiasiwan Oil Production Plant ; Yanchang Oilfield Incorporated Company ; Yan’an 716100 ; China) ; Yang Yunxiang
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(3)
- 关键词：储层性质 ; reservoir properties ; 地层损害 ; formation damage ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.197-202
- 图表：7 illus., 4 tables, 7 refs.
- 分类号：1003
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
The Chang 8 formation water in the area of Liuluoyu is of CaCl2 water type, and the scaling damage is mainly caused by BaSO4. The injection water was Chang 2 formation water, whose water types and constitutions were similar to Chang 8. Compatibility experiment results showed that with the increasing of temperature and pressure, the tendency of CaCO3 scaling in single water sample was rising while the tendency of BaSO4 scaling was decreasing. After the combination of injection water and grinded core, the white precipitate composed of BaSO4 and CaCO3 was generated. Test results with water sample of different mix ratio suggested that improving the ratio of injection water could effectively reduce the quantities of precipitates generated from mixed liquids. In addition, with the continuous injection of water, the corers permeability varied slightly, which indicated that mixed water could hardly cause damage to reservoirs.