FIELD: oil industry.
SUBSTANCE: invention relates to the oil industry and, in particular, to isolating or limiting water inflow to oil wells with highly heterogeneous, fractured reservoirs. The composition for enhanced oil recovery contains aluminum salt, carbamide, urotropine, polyvinyl alcohol - PVA, boric acid and water. In this case, the composition additionally contains polyols - polyhydric alcohols. As these, glycerin or sorbitol or mannitol is provided. The composition has the following ratio of components, wt%: aluminum salt AlCl3 - in terms of anhydrous salt - 2.0-8.0; urea - 4.0-20.0; urotropin - 2.0-8.0; PVA - 1.0-5.0; boric acid - 0.5-1.0; polyol - 2.0-20, water - the rest.
EFFECT: increase in oil recovery from reservoirs with low reservoir temperature by improving the rheological properties and plugging characteristics of the gel used, which forms a water barrier.
1 cl, 2 tbl, 18 ex, 7 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| OIL RECOVERY ENHANCING COMPOSITION AND PREPARATION METHOD THEREOF | 2009 |
|
RU2410406C1 |
| COMPOSITION FOR INCREASE OF OIL RECOVERY AND METHOD OF PREPARATION | 2015 |
|
RU2577556C1 |
| METHOD FOR FORMING AN ANTI-FILTRATION BARRIER FOR RADIOACTIVE WASTE STORAGE FACILITIES | 2021 |
|
RU2757782C1 |
| COMPOSITION FOR INCREASING OIL RECOVERY OF FORMATIONS | 2019 |
|
RU2733350C1 |
| METHOD FOR INCREASING THE PETROLEUM RECOVERY OF LAYERS | 2021 |
|
RU2772651C1 |
| METHOD OF DEVELOPMENT OF OIL DEPOSIT | 2016 |
|
RU2610958C1 |
| COMPOSITION FOR INCREASING THE PETROLEUM RECOVERY OF FORMATIONS (VARIANTS) | 2021 |
|
RU2781207C1 |
| COMPOSITION FOR INCREASING OIL RECOVERY OF FORMATIONS (VERSIONS) | 2018 |
|
RU2685516C1 |
| COMPOSITION FOR INTENSIFICATION OF DEVELOPMENT OF LOW-YIELD HIGH-VISCOSITY OIL DEPOSITS WITH CARBONATE RESERVOIR | 2019 |
|
RU2715407C1 |
| COMPOSITION TO UP BED PRODUCTION RATE (VERSIONS) | 2014 |
|
RU2572439C1 |
