CN104946218A - Water plugging technology for salt well - Google Patents
Water plugging technology for salt well Download PDFInfo
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- CN104946218A CN104946218A CN201510310343.2A CN201510310343A CN104946218A CN 104946218 A CN104946218 A CN 104946218A CN 201510310343 A CN201510310343 A CN 201510310343A CN 104946218 A CN104946218 A CN 104946218A
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Abstract
The invention relates to a preparation method of a novel water plugging agent for a salt well, and the novel water plugging agent is used for plugging upper-layer leakage of the salt well. The technical scheme is that the preparation method comprises the following steps: firstly, adding a certain quantity of active water into a container A, then adding powdered calcium carbonate with the mass fraction of 15-20%, and stirring for 5 min for dispersion; secondly, adding a certain quantity of clear water into a container B, adding 0.1% of modified polyvinyl alcohol to prepare a polyvinyl-alcohol-containing solution, then adding superfine floating beads with the mass fraction of 10-15%, and stirring for 5 min for dispersion; (3) mixing the two suspensions at the proportion of (1:10)-(1:15), and stirring for 5 min to prepare the water plugging agent, wherein the suspensions are prepared at ordinary temperature.
Description
Technical field
The present invention relates to a kind of preparation of saline wells plugging agent, particularly the preparation method of a kind of saline wells upper strata plugging agent.
Background technology
Plugging agent is one for the treatment of agent commonly used in saline wells recovery process. in saline wells recovery process; generally squeeze into clear water by water injection well to salt deposit; clear water flows through salt deposit and dissolves stratum salt; obtain the salt solution of high density at wet well place, and due to the complicacy of subsurface geologic structures, the loose of geology or avalanche phenomenon usually can occur; creating holes crazing is stitched; cause reservoir pressure greatly to reduce, occur leakage phenomena, displacement in flooding effect is reduced or complete failure greatly.Traditional leakage stopping technology is generally missed for the level of displacement layer, helpless for the leakage of brine layer upper strata, for technique leak, has invented a kind of plugging agent for the leakage of gap, brine layer upper strata.
Summary of the invention
The present invention discloses a kind of new technology for the leakage of gap, shutoff saline wells upper strata according to the deficiencies in the prior art.The problem to be solved in the present invention occurs that gap, upper strata is missed in salt solution well layer, brine layer displacement pressure is reduced greatly, causes injected clear water can not effective displacement when going out salt solution, by injecting the blocking agent of configuration, leakage gap, shutoff upper strata, ensures that salt well can normally be produced.
The present invention is achieved through the following technical solutions:
Prepare several low-density inorganic materials and salt-resistant polymer, by changing active water and the proportioning containing polywater ratio and added inorganic materials, under the effect of shearing force, inorganic materials be can be uniformly dispersed in liquid phase and form stable suspension, inject brine layer by pump supercharging, because this composite plugging agent system volume density is less than salt solution, blocking agent system floats automatically, enter leakage gap, upper strata, blocking weak zone.By regulating active water and the proportioning containing polywater, the ascent rate of blocking agent can be regulated; Regulate the proportioning of different blocking agent, can different plugging effects be produced.
Comprise the following steps:
1) in active water, the powder CaCO3 that massfraction is 15%-20% is added, dispersed with stirring 5 minutes, obtained suspension;
2) in containing 0.1% cation-modified polyvinyl alcohol solution, add the ultra-fine drift pearl that massfraction is 10%-15%, dispersed with stirring 5 minutes, obtain suspension;
3) suspension that calcium carbonate and drift pearl are configured to is mixed with the ratio of 1:10-1:15, obtained required saline wells upper strata leakage plugging agent.
The present invention is the technology of a kind of novel process salt well upper strata leakage, and compared with prior art, the present invention has following advantage: preparation method's step of (1) this blocking agent is easy, and required preparation condition is loose, is easy in situ preparation; (2) this blocking agent can flexible plugging material proportioning, can change blocking agent distribution of sizes flexibly for different leakage spaces; (3) this blocking agent material therefor is simple and easy to get, and preparation expense is lower; (4) what this blocking agent mainly adopted is inorganic composite materials, and the infringement of formation is less.
Accompanying drawing explanation
Float after Fig. 1 blocking agent chance salt solution design sketch
Embodiment
Below by embodiment, the present invention is specifically described; embodiment is only for being further detailed the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art makes according to the content of the invention described above and adjustment also belong to the scope of protection of the invention.
The preparation of embodiment 1 one kinds of saline wells upper strata leakage blocking agents:
1) in container A, add a certain amount of active water, then add the powder calcium carbonate of massfraction 15%, dispersed with stirring 5min; In container B, adding a certain amount of clear water, add the modified polyvinyl alcohol of 0.1%, being prepared into the ultra-fine drift pearl containing adding massfraction 10% after poly-solution again, dispersed with stirring 5min; Mixed in the ratio of 1:10 by two kinds of suspension, stir 5min, obtained required composite plugging agent, the preparation of all suspension is carried out at normal temperatures.
The preparation of embodiment 2 one kinds of saline wells upper strata leakage blocking agents
2) in container A, add a certain amount of active water, then add the powder calcium carbonate of massfraction 15%, dispersed with stirring 5min; In container B, adding a certain amount of clear water, add the modified polyvinyl alcohol of 0.1%, being prepared into the ultra-fine drift pearl containing adding massfraction 15% after poly-solution again, dispersed with stirring 5min; Two kinds of suspension are mixed in the ratio of 1:10, stir 5min, obtained required composite plugging agent, thus liquid preparation carry out at normal temperatures.
The preparation of embodiment 3 one kinds of saline wells upper strata leakage blocking agents
3) in container A, add a certain amount of active water, then add the powder calcium carbonate of massfraction 20%, dispersed with stirring 5min; In container B, adding a certain amount of clear water, add the modified polyvinyl alcohol of 0.1%, being prepared into the ultra-fine drift pearl containing adding massfraction 10% after poly-solution again, dispersed with stirring 5min; Mixed in the ratio of 1:10 by two kinds of suspension, stir 5min, obtained required blocking agent, so the preparation of liquid is carried out at normal temperatures.
The preparation of embodiment 4 one kinds of saline wells upper strata leakage blocking agents
4) in container A, add a certain amount of active water, then add the powder calcium carbonate of massfraction 20%, dispersed with stirring 5min; In container B, adding a certain amount of clear water, add the modified polyvinyl alcohol of 0.1%, being prepared into the ultra-fine drift pearl containing adding massfraction 15% after poly-solution again, dispersed with stirring 5min; Mixed in the ratio of 1:10 by two kinds of suspension, stir 5min, obtained required blocking agent, so the preparation of liquid is carried out at normal temperatures.
Claims (2)
1. a novel saline wells plugging agent and compound method thereof.Its feature comprises following step and obtains:
1) in active water, the powder CaCO3 that massfraction is 15%-20% is added, dispersed with stirring 5 minutes, obtained suspension;
2) in clear water, add 0.1% cation-modified polyvinyl alcohol be made into containing poly-solution, then add the ultra-fine drift pearl that massfraction is 10%-15%, stir 5 minutes, obtained suspension;
3) two kinds of suspension are mixed in the ratio of 1:10-1:15, obtained required saline wells upper strata leakage plugging agent.
2. the saline wells plugging agent obtained by can automatically float under without the effect of shearing force, by regulating active water and the proportioning containing polywater, can regulate the ascent rate of blocking agent; Regulate the proportioning of different blocking agent, can different plugging effects be produced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510310343.2A CN104946218A (en) | 2015-06-09 | 2015-06-09 | Water plugging technology for salt well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510310343.2A CN104946218A (en) | 2015-06-09 | 2015-06-09 | Water plugging technology for salt well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104946218A true CN104946218A (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510310343.2A Pending CN104946218A (en) | 2015-06-09 | 2015-06-09 | Water plugging technology for salt well |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127400A (en) * | 2010-11-24 | 2011-07-20 | 中国海洋石油总公司 | Plugging agent for drilling fluid and protecting low percolation reservoir |
| CN103387824A (en) * | 2013-08-09 | 2013-11-13 | 卫辉市化工有限公司 | Method for preparing plugging agent for well drilling |
| CN103725277A (en) * | 2013-12-18 | 2014-04-16 | 四川省博仁达石油科技有限公司 | Fibre compound temporary plugging agent |
| CN103740351A (en) * | 2013-12-31 | 2014-04-23 | 东营泰尔石油技术有限公司 | Low-density consolidation type plugging agent |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
-
2015
- 2015-06-09 CN CN201510310343.2A patent/CN104946218A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102127400A (en) * | 2010-11-24 | 2011-07-20 | 中国海洋石油总公司 | Plugging agent for drilling fluid and protecting low percolation reservoir |
| CN103387824A (en) * | 2013-08-09 | 2013-11-13 | 卫辉市化工有限公司 | Method for preparing plugging agent for well drilling |
| CN103725277A (en) * | 2013-12-18 | 2014-04-16 | 四川省博仁达石油科技有限公司 | Fibre compound temporary plugging agent |
| CN103740351A (en) * | 2013-12-31 | 2014-04-23 | 东营泰尔石油技术有限公司 | Low-density consolidation type plugging agent |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
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Application publication date: 20150930 |