CN102877811A - Selective water plugging ball for profile control of water injection well and preparation method and application of selective water plugging ball - Google Patents
Selective water plugging ball for profile control of water injection well and preparation method and application of selective water plugging ball Download PDFInfo
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- CN102877811A CN102877811A CN2012103571072A CN201210357107A CN102877811A CN 102877811 A CN102877811 A CN 102877811A CN 2012103571072 A CN2012103571072 A CN 2012103571072A CN 201210357107 A CN201210357107 A CN 201210357107A CN 102877811 A CN102877811 A CN 102877811A
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- profile control
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- plugging ball
- injection well
- rosin
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Abstract
The invention provides a selective water plugging ball for profile control of a water injection well and a preparation method and application of the selective water plugging ball. The selective water plugging ball is prepared from mixture of rosin and industrial paraffin, and the preparation method comprises the following specific steps of: mixing rosin and industrial paraffin and heating a mixture to obtain a melt, or heating rosin and industrial paraffin respectively to obtain melts and then mixing the melts; pouring into a mould; and cooling to obtain the selective water plugging solid product. The selective water plugging ball can be applied to plugging a shot hole in a subdivisional water injection interval of the water injection well of an oil field; and water injection effect can be improved, so that the oil extraction yield and oil extraction efficiency can be improved.
Description
Technical field
The present invention relates to a kind of Profile Control in Injection Well with selective plugging ball and preparation method thereof and application, thereby specifically throw accent stifled ball, its preparation method that profile control ball shutoff borehole uses in a kind of water injection well in oil fields subdivision injection interval and utilize this selective plugging ball to improve the method for oil extraction output and oil recovery efficiency to improve flood effectiveness.
Background technology
Ball injection profile control technique is mainly used in the inspissated pool thermal production well, can't cause interlayer to inhale the problem of vapour inequality by layer steam injection to solve because cover becomes.Prior art (the Cheng Xin that " utilizes pitching to select the notes technology to prevent that viscous crude steam vapour from altering ", " Inner Mongol chemical industry ", the 23rd phase P98-99 in 2009) according to heat notes operating mode and Sealing Conditions the selective plugging ball is proposed following technological requirement: 1. selective plugging ball relative density is: 0.9～1, and can be floating mobile in fluid to guarantee the selective plugging ball; 2. high temperature resistant 320 ℃ of selective plugging ball, withstand voltage 17MPa; 3. the selective plugging ball can have good mechanical strength and certain elasticity under HTHP, and on the one hand, under high-temperature and high-pressure conditions, stifled ball can not affect plugging effect because of breakage; On the other hand, under high-temperature and high-pressure conditions, stifled ball must have certain elasticity (under 320 ℃, 17MPa pressure, borehole about shutoff 12mm, the spheroid insert depth is about 3mm), namely can not follow the string affects the effect of shutoff borehole, more can not because of the selective plugging ball too soft borehole that is squeezed into that becomes, stop up oil reservoir.4. the diameter of stifled ball is 22mm.During steam injection, metal ball stops steam to enter with the direct shutoff high permeability formation of steam flow borehole, finishes profile control in the pit shaft.
In recent years, above-mentionedly utilize pitching to select the notes technology also to be useful on water injection well shutoff high permeability formation borehole, thereby the shutoff waterflood path is annotated well but be only limited to system, and be the interior shutoff of pit shaft.See " Studies on Technology of Water Injectivity " (Sun Tongwen etc. for details, " oilfield chemistry ", 1 phase P20-22 in 2003), wherein be at the large interval of water injection well water absorption, flow synchronously with injected water, slightly larger in diameter is in the direct homogeneous rigidity plastics of borehole ball, leaning on the tangible borehole of pressing under the difference between reservoir pre ssure and injection pressure effect, borehole is blocked, make injected water flow to and enter other intervals.In addition, and prior art document " theoretical and experimental study of water injection well ball injection profile control technique " (Sun Tongwen etc., " oilfield chemistry ", 2003Vol.20No.2P.113-118); " the ball injection profile control technology is in the application of waterflooding reservoir " (Xue Lei, " Inner Mongol petrochemical industry ", the 10th phase P142 in 2010); " ball injection profile control is adjusted reservoir water section technology " (Shao Chen, Wang Huaiming, " Worker's Univ. Shengli Oil Field's journal " Vol.23No.1P44-45) also is studied report to the technology of same principle.CN2597662Y discloses a kind of composite unidirection ball injection stop, formed by oil pipe and tubing string, tubing nipple, unidirectional resistive device, righting stop, after ball injection profile control or temporarily stifled acidifying of pitching, the forward and reverse well-flushing of energy, near profile control ball certain area oil reservoir does not flow away with current, has strengthened the long-time stability of profile control effect.
Yet, in the practical application, because there are the problems such as substratum is many, interlayer is thin in the water filling block that has, cause thinner that water injection string can't divide, just still there is the inhomogeneous problem of interlayer suction in this in the little interval that causes dispensing, and the interval of dispensing has been not easy to take chemical profile control technique owing to reasons such as Water-filling nozzle throttlings, more can't implement the ball injection profile control in the layering well section.
Summary of the invention
Main purpose of the present invention is to provide a kind of Profile Control in Injection Well selective plugging ball, specifically throws the stifled ball of accent that profile control ball shutoff borehole is used in a kind of subdivision injection interval, with the raising flood effectiveness, thereby improves oil extraction output and oil recovery efficiency.
Another object of the present invention is to provide the preparation method of described Profile Control in Injection Well with the selective plugging ball.
Another object of the present invention is to provide the application of described Profile Control in Injection Well with the selective plugging ball, specifically its application in the Profile Control in Injection Well process.
On the one hand, the invention provides a kind of Profile Control in Injection Well selective plugging ball, it is to be made by the mixture of rosin and industrial paraffin.
Be the rigidity plastics ball than traditional selective plugging ball, the present invention has thoroughly changed the material of selective plugging ball, adopts the mixture of rosin and industrial paraffin to prepare the selective plugging ball.
Under the rosin normal temperature be a kind of little Huang to the transparent solid of yellowish red color, 70～90 ℃ of its softening points, proportion 1.070～1.085g/cm
3The proportion of paraffin is 0.78～0.82g/cm
3, 55～75 ℃ of softening points.
For every batch rosin and paraffin, must accurately measure its density.
According to specific embodiments of the present invention, be that to make the density of selective plugging ball be 0.9～1g/cm for the mixed proportion of adjusting rosin and paraffin
3
According to specific embodiments of the present invention, the mixed proportion of described rosin and paraffin is generally: the rosin blend range approximately is 24%～41%, and the paraffin blend range approximately is 76%～59%.
According to specific embodiments of the present invention, Profile Control in Injection Well of the present invention with the selective plugging ball be with rosin become with the industrial paraffin Hybrid Heating fused mass or with rosin with mix after industrial paraffin is heated into fused mass, and pour mould into, cooling and the solid-state selective plugging ball product that obtains.
The present invention with transferring in the past another difference of stifled ball was: changing the outer shutoff of borehole is shutoff in the borehole, and according to specific embodiments of the present invention, Profile Control in Injection Well of the present invention selective plugging ball, its diameter are 70～90% of purpose oil-layer blasthole diameter.The selective plugging ball is slightly less than borehole, can enter to carry out profile control in the borehole.
On the other hand, the present invention also provides the preparation method of described Profile Control in Injection Well with the selective plugging ball, and the method comprises:
Rosin is become fused mass with the industrial paraffin Hybrid Heating, perhaps with rosin with mix after industrial paraffin is heated into fused mass, then pour the rosin of melting and the mixture of industrial paraffin into mould, cooling obtains solid-state selective plugging ball product.
On the other hand, the present invention also provides the application of described Profile Control in Injection Well with the selective plugging ball, specifically its application in the water injection well in oil fields profile control, and more specifically described selective plugging ball is used for ball-off borehole in the water injection well in oil fields subdivision injection interval.
When utilizing selective plugging ball of the present invention to carry out the water injection well in oil fields profile control, can utilize existing pitching device that selective plugging ball pushing belt is entered well, enter oil reservoir by borehole.For example, specifically can carry out according to following operation:
1, according to geologic requirements, water injection well is divided into several intervals according to formation condition, select again the interval of needs dispensing ball injection profile control selective plugging ball profile control according to the formation condition of the substratum in each interval;
2, select the dispensing ball injection profile control selective plugging ball of respective numbers according to the substratum geological conditions in the need ball injection profile control interval, blasthole number and borehole aperture, the quantity of ball guarantees to be as the criterion needing the shutoff borehole to block;
3, dispensing ball injection profile control selective plugging ball is packed on the ground Sheng cage Inner of ball injection profile control injection well downhole flow regulator, and baffle plate installed;
4, successively tubing string is connected by the dispensing requirement, lower after the planned well section completion;
5, behind the release profile control ball, normal water filling can reach requirement.
In sum, provide and thrown the stifled ball of accent that profile control ball shutoff borehole is used in a kind of subdivision injection interval, be applied to the interior ball injection profile control of pit shaft of separate injection interval in the oil-field flooding later stage separate water injection well, realization is to the shutoff of water stream channel, with plane and the interlayer contradiction of improving the separate injection interval oil reservoir, make the intake profile of water injection well become more balanced, enlarge the water drive swept volume, thereby can improve flood effectiveness, improve oil extraction output and oil recovery efficiency, lay the foundation for realizing water injection well in oil fields subdivision injection ball injection profile control integral process.The present invention has following beneficial effect:
1, with low cost, Meteorological is low, compares with existing subdivision injection technique, has just increased the expense of dispensing ball injection profile control ball, reduces great amount of cost than the chemical profile control technology;
2, use safety, environmental protection, compare more environmental protection, safety than chemical profile control technique;
3, used profile control ball is slightly less than borehole, can enter to carry out profile control in the borehole;
If 4 actual plugging strengths are higher, cause water injection pressure too high, do not meet field requirement, can adopt the method for heating with dispensing ball injection profile control selective plugging ball fusing de-plugging, that is, used profile control ball can block up and can separate.
5, technique is simple, only uses tubing string to connect and both can finish, and is simple, convenient.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and beneficial effect being had more clearly, existing technical scheme of the present invention is carried out following detailed description, but but can not be interpreted as restriction to practical range of the present invention.
Embodiment 1
It is the fused mass of 1.00g/cm3 that the rosin 24% of proportion 1.070 is become proportion with proportion 0.78 paraffin 76% Hybrid Heating, pour in the mould of 6mm diameter, except burr removing, (this finished diameter be about purpose oil-layer blasthole diameter 80%) gets product after the cooling.
When utilizing selective plugging ball of the present invention to carry out the water injection well in oil fields profile control, can selective plugging ball pushing belt be entered well by " the water injection well in oil fields subdivision injection ball injection profile control integrated pipe column " of prior art, enter oil reservoir by borehole, concrete operations are as follows:
1, according to Jin2-12-503Jing suction situation, water injection well is divided into two intervals according to formation condition, places at the bottom interval and transfer stifled ball.
2, according to the substratum geological conditions in the need profile control interval, select 200 in profile control selective plugging ball.
3, dispensing ball injection profile control selective plugging ball is packed on the ground Sheng cage Inner of water injection well subdivision injection ball injection profile control integrated pipe column injection well downhole flow regulator (prior art), and baffle plate installed.
4, successively tubing string is connected by the dispensing requirement, lower after the planned well section completion.
5, behind the release profile control ball, normal water filling.
6, after the construction, water injection pressure rises to 3.05MPa by 2.5MPa.
7, construction is after three months, corresponding oil well brocade 99-34-26 side well, and creation data is by day production fluid 31.3m
3, day produce oil 0.3t, moisture 99%, be changed to a day production fluid 29.8m
3, day produce oil 0.9t, moisture 98%, seen certain oil increasing precipitation effect.
Claims (9)
1. Profile Control in Injection Well selective plugging ball, it is to be made by the mixture of rosin and industrial paraffin.
2. Profile Control in Injection Well according to claim 1 selective plugging ball, wherein, 70～90 ℃ of the soft change points of described rosin, proportion 1.070～1.085g/cm
355～75 ℃ of the softening points of described paraffin, proportion 0.78～0.82g/cm
3
3. Profile Control in Injection Well according to claim 1 selective plugging ball, wherein, it is 0.9～1g/cm that the mixed proportion of adjusting rosin and paraffin makes the density of selective plugging ball
3
4. according to claim 1 or 3 described Profile Control in Injection Well selective plugging balls, wherein, the mixed proportion of described rosin and paraffin is: rosin 24%～41%, paraffin 76%～59%.
5. Profile Control in Injection Well according to claim 1 selective plugging ball, this selective plugging ball be with rosin become with the industrial paraffin Hybrid Heating fused mass or with rosin with mix after industrial paraffin is heated into fused mass, and pour mould into, cooling and the solid-state selective plugging ball product that obtains.
6. Profile Control in Injection Well according to claim 1 selective plugging ball, the diameter of this selective plugging ball is 70%～90% of purpose oil-layer blasthole diameter.
7. one kind prepares the method that each described Profile Control in Injection Well of claim 1～6 is used the selective plugging ball, and the method comprises:
Rosin is become fused mass with the industrial paraffin Hybrid Heating, perhaps with rosin with mix after industrial paraffin is heated into fused mass, then pour the rosin of melting and the mixture of industrial paraffin into mould, cooling obtains solid-state selective plugging ball product.
8. each described Profile Control in Injection Well selective plugging ball application in the water injection well in oil fields profile control of claim 1～6.
9. application according to claim 8 wherein is that described selective plugging ball is used for ball-off borehole in the water injection well in oil fields subdivision injection interval.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210357107.2A CN102877811B (en) | 2012-09-21 | 2012-09-21 | Profile Control in Injection Well selective plugging ball and preparation method thereof and application |
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| CN201210357107.2A CN102877811B (en) | 2012-09-21 | 2012-09-21 | Profile Control in Injection Well selective plugging ball and preparation method thereof and application |
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| CN102877811B CN102877811B (en) | 2016-02-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273350A (en) * | 2015-11-09 | 2016-01-27 | 中国石油天然气股份有限公司 | Plugging control ball and preparation method thereof |
| CN105370238A (en) * | 2015-11-18 | 2016-03-02 | 中国石油天然气股份有限公司 | Blockage adjusting ball density and diameter selecting method and device |
| CN108329899A (en) * | 2018-02-20 | 2018-07-27 | 盘锦众帮商贸有限公司 | A kind of stifled ball of isodensity tune |
| CN111827917A (en) * | 2019-04-22 | 2020-10-27 | 中国石油天然气股份有限公司 | Fireflooding gas injection well ball injection profile control process |
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| US4233162A (en) * | 1978-02-07 | 1980-11-11 | Halliburton Company | Oil well fluids and dispersants |
| CN1597837A (en) * | 2004-08-05 | 2005-03-23 | 北京卓辰基业技术开发有限公司 | Water-solubility acidity temporary plugging agent for press cracking |
| CN102504779A (en) * | 2011-12-21 | 2012-06-20 | 中国石油天然气股份有限公司 | Paraffin rosin water plugging agent for water plugging of thick oil huff-puff well and water plugging construction method |
| CN102606118A (en) * | 2012-03-28 | 2012-07-25 | 中国石油天然气股份有限公司 | Subdivision water injection, ball-off and profile control integrated tubular column for water injection well of oilfield and process of tubular column |
-
2012
- 2012-09-21 CN CN201210357107.2A patent/CN102877811B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4233162A (en) * | 1978-02-07 | 1980-11-11 | Halliburton Company | Oil well fluids and dispersants |
| CN1597837A (en) * | 2004-08-05 | 2005-03-23 | 北京卓辰基业技术开发有限公司 | Water-solubility acidity temporary plugging agent for press cracking |
| CN102504779A (en) * | 2011-12-21 | 2012-06-20 | 中国石油天然气股份有限公司 | Paraffin rosin water plugging agent for water plugging of thick oil huff-puff well and water plugging construction method |
| CN102606118A (en) * | 2012-03-28 | 2012-07-25 | 中国石油天然气股份有限公司 | Subdivision water injection, ball-off and profile control integrated tubular column for water injection well of oilfield and process of tubular column |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273350A (en) * | 2015-11-09 | 2016-01-27 | 中国石油天然气股份有限公司 | Plugging control ball and preparation method thereof |
| CN105273350B (en) * | 2015-11-09 | 2017-07-28 | 中国石油天然气股份有限公司 | One kind adjusts stifled ball and preparation method thereof |
| CN105370238A (en) * | 2015-11-18 | 2016-03-02 | 中国石油天然气股份有限公司 | Blockage adjusting ball density and diameter selecting method and device |
| CN105370238B (en) * | 2015-11-18 | 2017-12-05 | 中国石油天然气股份有限公司 | A kind of choosing method and device for adjusting stifled ball density and diameter |
| CN108329899A (en) * | 2018-02-20 | 2018-07-27 | 盘锦众帮商贸有限公司 | A kind of stifled ball of isodensity tune |
| CN111827917A (en) * | 2019-04-22 | 2020-10-27 | 中国石油天然气股份有限公司 | Fireflooding gas injection well ball injection profile control process |
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| CN102877811B (en) | 2016-02-10 |
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