摘要
In order to solve the negative influence of the high salinity of formation water on the performance of the deep liquid flow divertring agent in the CaCl2 water type oilfield, reduce the cost of the steering agent, and then achieve the purpose of reducing the cost and increasing the efficiency, the gel performance, plugging and diverting performance and field application of a composite silicate microgel diverting agent OMGL, synthesized by a variety of inorganic materials through special processes, in the CaCl2 water type formation water was discussed. The diverting agent OMGL reacted with Ca2+ and Mg2+ in high salinity formation water (injected water). The gelation reaction of 0.6%OMGL in oil field water completed within 12-24 h at room temperature. With the increase of OMGL concentration, the gelation degree of the system increased and the gelation degree of the 3%OMGL+1%CaCl2 aqueous solution system was 100%. The microgel with particle size of 0.05-2 μm was formed by the gel reaction of OMGL with Ca2+ and Mg2+ in the formation water, which was difficult to enter the low permeability microporous matrix, and a stable microgel coating was formed through the -Si-O-Si- bond on the surface of the rock skeleton of the dominant channel. The diverting agent OMGL was ideal for plugging the core with a permeability ratio of 10~50 times. This kind of diverting agent had been carried out in the field experiments with different temperatures and different salinity conditions at home and abroad, the effect of the enhancement of oil recovery of water flooding was good, the water injection pressure increasing by 2-3 MPa, and the oil increasing effect being good and the effective period being over 1 years.
投稿的翻译标题 | Improvement of Water Flooding Efficiency by Using the Reservoir Forming Ion Source to Realize the Adjustment of the Dominant Channel |
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源语言 | 繁体中文 |
页(从-至) | 257-262 |
页数 | 6 |
期刊 | Oilfield Chemistry |
卷 | 35 |
期 | 2 |
DOI | |
出版状态 | 已出版 - 25 6月 2018 |
已对外发布 | 是 |
关键词
- Deep profile
- Diverting agent
- Field test
- Inorganic gel
- Native scale formation ion
- Reducing the cost and increasing efficiency