CN101712863A - Water plugging agent for carbonatite and preparation method and using method thereof - Google Patents
Water plugging agent for carbonatite and preparation method and using method thereof Download PDFInfo
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- CN101712863A CN101712863A CN200910210625A CN200910210625A CN101712863A CN 101712863 A CN101712863 A CN 101712863A CN 200910210625 A CN200910210625 A CN 200910210625A CN 200910210625 A CN200910210625 A CN 200910210625A CN 101712863 A CN101712863 A CN 101712863A
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Abstract
The invention provides a water plugging agent for carbonatite and a preparation method and a using method thereof. The water plugging agent consists of the following raw materials in part by weight: 5 to 14 parts of cement, 4 to 8 parts of quartz, 0.1 to 0.5 part of cement flocculating agent, 4 to 11 parts of density lightening admixture, 1 to 2 parts of grid structure agent and 72 to 74 parts of water. The water plugging agent has high bonding strength and low density, and is suitable for high-temperature and high-mineralization carbonatite oil wells so as to solve the problem that the water plugging agent in the prior art is not suitable for the high-temperature and high-mineralization environment, has poor bonding strength and high density, and cannot effectively control water or improve the oil recovery ratio.
Description
Technical field
The present invention relates to oilfield exploitation specialty chemical, particularly, relate to a kind of water plugging agent for carbonatite.The invention still further relates to the preparation method and the using method of this plugging agent.
Background technology
The geological state in the big hole of the normally big seam of main oil producing interval of Carbonate Reservoir barreler, reservoir have the bigger end water water body of association in tangible nonuniformity characteristics, the while oil well.
In the process of exploitation carbonatite oil well, in case bottom-water breakthrough and enter reservoir after since the density variation of crude oil and end water (density of crude oil is 0.8g/cm
3, the density of end water is 1.14g/cm
3), the water ratio of oil reservoir rises rapidly, can cause compacting to the oil reservoir of oil well payzone, cause output to descend significantly.And behind the oil well water breakthrough, along with the quickening of end lifting speed waterborne, the speed of gathering of oil well is also successively decreased thereupon.Work present situation both domestic and external shows often sudden and violent property water logging behind the Carbonate Reservoir water breakthrough, oil reservoir is gathered cause very big influence.As seen, in correlation technique, there is the problem of Carbonate Reservoir water inlet back oil recovery decline at present.
Water-plugging technique can solve the problem that Carbonate Reservoir water inlet back oil recovery descends.Water-plugging technique comprises cement water blockoff and deep chemical water plugging.
(1) cement water blockoff
The cement water-plugging technique is meant with grout (being plugging agent) shutoff whole production well section, promptly passage and the whole shutoff of produce oil passage waterbornely scurried in the end, and then recovers the oil according to feed flow situation acidolysis part payzone.
But in actual applications, there is following problem at least in the cement water-plugging technique:
The first, the grout cementing property is poor, and grout is met end water dilution or self sedimentation after entering productive section, is unfavorable for forming complete plugging system, thereby can't carries out effective water blockoff;
The second, cement slurry density is big, and cement slurry density reaches 1.5g/cm usually
3About (reservoir pressure coefficient generally is lower than 1.15g/cm3), produce big pressure reduction in pit shaft (in the 5000m tubing string) bottom, form grout and miss in a large number, thereby effective water blockoff; Can form water blockoff by polluted reservoir if grout is not missed, like this, need carry out acidolysis to payzone and recover production capacity, thereby can't effectively recover the oil;
The 3rd, the grout plugging agent high temperature, high salinity (more than 120 ℃, easily disperse in 20 * 104mg/L) the carbonatite oil well, be difficult for cohesion, thereby can't carry out effective water blockoff;
The 4th, in the process of practice of construction, the density of grout is far above reservoir pressure coefficient, and factors judgements such as consumption selection and operation pressure are blured during process implementing, and the success ratio of influence construction can't realize effective water blockoff, oil recovery.
(2) deep chemical water plugging
The deep techniques of chemical water plugging adopts the principles of chemistry to make plugging agent form tamper, promptly forms control water dividing plate between end water and crude oil, realizes the control end purpose of scurrying, improve oil recovery waterborne.
But there is following at least problem in the deep techniques of chemical water plugging in practical application:
The first, glued joint inorganic plugging agent owing to have easily diluted or density is big, the end water dilution that can be entered in the immediate vicinity of wellbore, thus the forfeiture characteristic or can not shutoff from hole with seam, pit shaft ground far away slightly, and then forfeiture water blockoff function;
The second, composition plugging agent performance difference in application changes greatly, forms big pressure reduction in the shaft bottom easily, can cause unpredictable injury to oil reservoir; And the bonding property of composition plugging agent is poor, miss easily, makes that the Control Radius of the control water dividing plate that blocking agent forms is little, and water blockoff is invalid or validity period short;
The 3rd, the sedimentation type plugging agent contacts back formation precipitation easily and stops up and scurry the crack with end water, though this plugging agent has certain selectivity, low and not anti-the washing away of intensity, and also reaction occurs in the face contact site and makes the serviceability of follow-up blocking agent to be utilized effectively.
As seen, the plugging agent that is applied to the carbonatite oil well in the correlation technique exists that environment, the cementing property be not suitable for high temperature and high salinity are poor, density is big, thereby can't effectively control water, reduce the problem of oil recovery.
Summary of the invention
In view of this, the present invention proposes a kind of water plugging agent for carbonatite and shutoff method, plugging agent exists in the correlation technique the environment that is not suitable for high temperature and high salinity, cementing property are poor, density is big in order to solve, and can't effectively control the problem of water, reduction oil recovery.
According to an aspect of the present invention, provide a kind of water plugging agent for carbonatite.
Water plugging agent for carbonatite according to the present invention is made of the raw material of following weight part: 5～14 parts of cement, quartzy 4～8 parts, 0.1～0.5 part of Flocculated Cement agent, 4～11 parts of density light-weight additives, 1～2 part of spatial grid structure agent, 72～74 parts in water.
Preferably, above-mentioned plugging agent is made of the raw material of following weight part: 5.82 parts of cement, quartzy 8.73 parts, 10.92 parts of density light-weight additives, 1.46 parts of spatial grid structure agent, 0.29 part of Flocculated Cement agent, 72.78 parts in water.
Preferably, above-mentioned plugging agent is made of the raw material of following weight part: 14.75 parts of cement, quartzy 4.42 parts, 4.79 parts of density light-weight additives, 1.84 parts of spatial grid structure agent, 0.44 part of Flocculated Cement agent, 73.75 parts in water.
Preferably, above-mentioned density light-weight additive comprises one of following: flyash, clay.
Preferably, above-mentioned spatial grid structure agent comprises: polypropylene acyl ammonia.
A kind of preparation method of above-mentioned water plugging agent for carbonatite is provided according to another aspect of the present invention.
The preparation method of above-mentioned water plugging agent for carbonatite comprises: add 5～14 parts of Flocculated Cement agent in 72～74 parts of water, stir, become first solution; In first solution, add 1～2 part of spatial grid structure agent, stir, become second solution; In second solution, add 4～8 parts of quartz, stir, become the 3rd solution; In the 3rd solution, add 4～11 parts of density light-weight additives, stir, become the 4th solution; In the 4th solution, add 5～14 parts of cement, stir, promptly get plugging agent; Wherein, part is a weight part.
A kind of using method of above-mentioned water plugging agent for carbonatite is provided according to another aspect of the present invention.
The using method of above-mentioned water plugging agent for carbonatite comprises: measure the height on surface waterborne, the end in the carbonatite oil well and the height of crude oil lower surface; With the injection phase of the zone between the height of the height on surface waterborne, the end and crude oil lower surface as plugging agent; The plugging agent for preparing is injected into the injection phase.
The density of water plugging agent for carbonatite provided by the invention is 0.86～1.14g/cm
3, can under the environment of 50～150 ℃ of temperature under the carbonatite oil well, form impervious solid-state cementing matter, the ultimate compression strength of this cementing matter can reach 0.3～1.0Mpa; Adopt cement and quartz to make the plugging agent possess hydrophilic property as the basic substance of plugging agent, make plugging agent can preferentially enter the product aquaporin, adopt the density light-weight additive that this plugging agent is had than low density, make plugging agent not free settling or leakage, use the spatial grid structure agent to make this plugging agent have stronger bonding capacity, make plugging agent be difficult for disperseing or dilution, and use the Flocculated Cement agent to regulate the curring time that condenses of plugging agent, make that plugging agent splicing degree according to the present invention is strong, the low high temperature that is applicable to of density, the environment of high salinity, thereby can solve the environment that is not suitable for high temperature and high salinity that plugging agent exists in the correlation technique, cementing property is poor, density is big, can't effectively control water, improve the problem of oil recovery.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification sheets, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification sheets of being write, claims.
Embodiment
Below embodiments of the invention are described, should be appreciated that embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Embodiment one
At first, prepare water plugging agent for carbonatite by following preparation method.
(1) preparation method:
Step 1 is inserted the water of 72.78 weight parts in stirred vessel, the Flocculated Cement agent of 0.29 weight part is added in the entry, stirs, and makes it abundant dissolving, becomes first solution;
Step 2 joins the polypropylene acyl ammonia of 1.46 weight parts in above-mentioned first solution, stirs, and makes it abundant dissolving, becomes second solution;
Step 3 joins the quartz of 8.73 weight parts in above-mentioned second solution, stirs, and makes it abundant dissolving, becomes the 3rd solution;
Step 4 joins the flyash or the clay of 10.92 weight parts in above-mentioned the 3rd solution, stirs, and becomes the 4th solution;
Step 5 joins the cement of 5.82 weight parts in above-mentioned the 4th solution, stirs, and promptly becomes the plugging agent of present embodiment.The density of the plugging agent that present embodiment provides is 0.86g/cm
3
The plugging agent that present embodiment provides has following characteristic:
The first, adopt cement, quartzy basic substance to make its possess hydrophilic property as this plugging agent, wetting ability makes water blockoff liquid can preferentially enter the product aquaporin, can cut off profit communication passage up and down after plugging agent is fixed, and keeps the produce oil passage;
The second, adopt flyash as the density light-weight additive, make this plugging agent have lower density (0.86g/cm
3), and utilize to press the stratified thinking of awl density variation, make this blocking agent can be at the crude oil (0.8g/cm of less dense
3) and the end water (1.14g/cm of bigger density
3) between fixed, thereby can between end water and crude oil, form control water dividing plate, the passage of water of the isolated end and top pay sand;
The 3rd, adopt polypropylene acyl ammonia as the spatial grid structure agent, make this plugging agent have cementing properties preferably, this performance make plugging agent glued form be difficult for behind the solid-state cementing matter diluted, can guarantee the integrity of plugging agent after fixed, and the ultimate compression strength of this solid-state cementing matter can reach 0.3Mpa;
The 4th, adopt the Flocculated Cement agent, make that the consolidation time of plugging agent and dehydration are controlled.
Secondly, the plugging agent that uses following process to use present embodiment to provide.
(2) using method
Step 1 is measured the height on surface waterborne, the end in the described carbonatite oil well and the height of crude oil lower surface;
Step 2 is with the injection phase of the zone between the height of the height on surface waterborne, the end and crude oil lower surface as plugging agent;
Step 3 uses high pressure dredge pump or cementing truck or fracturing truck will be injected into above-mentioned injection phase according to the plugging agent that above-mentioned preparation method prepares.
Because the plugging agent that provides of present embodiment has above-mentioned characteristic, in concrete the application, can bring the advantage aspect following at least:
The first, the density of plugging agent is low, and when plugging agent was injected into the down-hole, injection pressure was steady, can avoid the big pressure-difference fluctuation in shaft bottom, thereby can avoid polluting oil reservoir or blocking agent leakage; And the injection phase is controlled, can enlarge the Control Radius (80～120 can control the dividing plate radius more than 8 meters) of the control water dividing plate of plugging agent formation, this plugging agent can also be injected into relative larger distance with pit shaft, controls the angle of elevation crack in well far away area;
The second, can set the concrete setting time of plugging agent, for engineering construction brings controllability according to the concrete geological condition of carbonatite oil well of exploitation.
Embodiment two
Present embodiment provides a kind of water plugging agent for carbonatite, this plugging agent is made up of the raw material of following weight part: 14.75 parts of cement, quartzy 4.42 parts, 4.79 parts of clays (clay is as the density light-weight additive), 1.84 parts of polypropylene acyl ammonia (polyacrylamide is as the spatial grid structure agent), 0.44 part of Flocculated Cement agent, 73.75 parts in water.The density of this plugging agent is 1.14g/cm
3, the ultimate compression strength of the cementing thing of the fixed formation of this plugging agent is 1.0Mpa.
The preparation method of the plugging agent that present embodiment provides and using method are identical with preparation method and using method in the foregoing description one, repeat no more here.
Therefore the plugging agent that the embodiment of the invention provides has that cementing property is strong, density is low, is applicable to high temperature, the characteristics of the carbonatite oil well of high salinity environment.Table one has been listed the performance comparison situation of the plugging agent of the plugging agent of the embodiment of the invention and correlation technique.
Table one
| The blocking agent title | Shut-off capacity | Adaptive temperature/℃ | Stability | Density | Dispersed in water | Intensity |
| The silicate precipitates system | High | ??100～120 | Generally | ??1.2～1.35 | Disperse | Low |
| Clay dispersion | Higher | ??100～120 | High | ??1.2～1.25 | Generally | Low |
| The clay flocculating body | High | ??100～120 | Generally | ??1.2～1.25 | Generally | High |
| Clay/solidified cement body | Very high | ??100～120 | High | ??1.3～1.5 | Disperse | Higher |
| The present embodiment plugging agent | Very high | ??100～120 | High | ??1.07～1.15 | Substantially do not disperse | Very high |
And, after the plugging agent that present embodiment provides is injected into sudden and violent property water logging carbonatite oil well, can be at water-oil interface the communication passage of fixed and blocking-up end water and pay sand, end water is scurried into payzone from angle of elevation crack and pit shaft can be brought into play the better controlled effect, realize the purpose of water and oil control.In addition, compare with cement water-plugging technique (promptly using conventional cement to stop up afterwards acidolysis top oil reservoir payzone again), the plugging agent that present embodiment provides, can realize that the water blockoff Control Radius increases, prolong and increase oily validity period, reduced the work operations amount of plug water construction simultaneously, remarkable in economical benefits can increase the success ratio of water blockoff measure.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a water plugging agent for carbonatite is characterized in that, is made of the raw material of following weight part:
5～14 parts of cement, quartzy 4～8 parts, 0.1～0.5 part of Flocculated Cement agent, 4～11 parts of density light-weight additives, 1～2 part of spatial grid structure agent, 72～74 parts in water.
2. water plugging agent for carbonatite according to claim 1 is characterized in that, is made of the raw material of following weight part:
5.82 parts of cement, quartzy 8.73 parts, 10.92 parts of density light-weight additives, 1.46 parts of spatial grid structure agent, 0.29 part of Flocculated Cement agent, 72.78 parts in water.
3. water plugging agent for carbonatite according to claim 1 is characterized in that, is made of the raw material of following weight part:
14.75 parts of cement, quartzy 4.42 parts, 4.79 parts of density light-weight additives, 1.84 parts of spatial grid structure agent, 0.44 part of Flocculated Cement agent, 73.75 parts in water.
4. according to each described water plugging agent for carbonatite in the claim 1 to 3, it is characterized in that it is one of following that described density light-weight additive comprises:
Flyash, clay or its mixture.
5. according to each described water plugging agent for carbonatite in the claim 1 to 3, it is characterized in that described spatial grid structure agent comprises:
Polypropylene acyl ammonia.
6. the preparation method of each described water plugging agent for carbonatite in the claim 1 to 3 is characterized in that, comprising:
In 72～74 parts of water, add 5～14 parts of Flocculated Cement agent, stir, become first solution;
In described first solution, add 1～2 part of spatial grid structure agent, stir, become second solution;
In described second solution, add 4～8 parts of quartz, stir, become the 3rd solution;
In described the 3rd solution, add 4～11 parts of density light-weight additives, stir, become the 4th solution;
In described the 4th solution, add 5～14 parts of cement, stir, promptly get described plugging agent; Wherein, described part is weight part.
7. the using method of each described water plugging agent for carbonatite in the claim 1 to 3 is characterized in that, comprising:
Measure the height on surface waterborne, the end in the described carbonatite oil well and the height of crude oil lower surface;
With the injection phase of the zone between the height of the height on surface waterborne, the described end and described crude oil lower surface as described plugging agent;
The described plugging agent for preparing is injected into described injection phase.
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| CN200910210625A CN101712863A (en) | 2009-11-04 | 2009-11-04 | Water plugging agent for carbonatite and preparation method and using method thereof |
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| CN200910210625A CN101712863A (en) | 2009-11-04 | 2009-11-04 | Water plugging agent for carbonatite and preparation method and using method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391845A (en) * | 2011-09-13 | 2012-03-28 | 任丘市华北石油通运石油机械有限公司 | Composite chemical blocking agent |
| CN103013479A (en) * | 2012-12-28 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司 | Sandstone coagulation slurry for plugging and plugging method thereof |
| CN104632123A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN105464639A (en) * | 2015-12-29 | 2016-04-06 | 中国石油天然气股份有限公司 | Bottom water reservoir fracturing method for controlling water channeling by using water-deformable proppant |
| CN107721334A (en) * | 2017-11-16 | 2018-02-23 | 重庆建工住宅建设有限公司 | A kind of emergent automatic leakage-blocking material |
| CN110805408A (en) * | 2019-05-31 | 2020-02-18 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN113666686A (en) * | 2021-08-20 | 2021-11-19 | 西南石油大学 | Selective water plugging agent and method for long-term oil stabilization and water control in oil and gas fields with high temperature and high pressure resistance |
| CN118754712A (en) * | 2024-07-18 | 2024-10-11 | 四川兰冠能源科技有限公司 | A selective water plugging agent and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102391845A (en) * | 2011-09-13 | 2012-03-28 | 任丘市华北石油通运石油机械有限公司 | Composite chemical blocking agent |
| CN102391845B (en) * | 2011-09-13 | 2016-07-27 | 任丘市奥源石油科技有限公司 | A kind of composite chemical blocking agent |
| CN103013479A (en) * | 2012-12-28 | 2013-04-03 | 中国石油集团川庆钻探工程有限公司 | Sandstone coagulation slurry for plugging and plugging method thereof |
| CN103013479B (en) * | 2012-12-28 | 2015-08-19 | 中国石油集团川庆钻探工程有限公司 | Sandstone coagulation slurry for plugging and plugging method thereof |
| CN104632123A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN104632123B (en) * | 2013-11-15 | 2017-08-04 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN105464639A (en) * | 2015-12-29 | 2016-04-06 | 中国石油天然气股份有限公司 | Bottom water reservoir fracturing method for controlling water channeling by using water-deformable proppant |
| CN105464639B (en) * | 2015-12-29 | 2018-02-02 | 中国石油天然气股份有限公司 | Bottom water reservoir fracturing method for controlling water channeling by using water-deformable proppant |
| CN107721334A (en) * | 2017-11-16 | 2018-02-23 | 重庆建工住宅建设有限公司 | A kind of emergent automatic leakage-blocking material |
| CN110805408A (en) * | 2019-05-31 | 2020-02-18 | 大港油田集团有限责任公司 | Profile control process method for water injection well with packer pipe column |
| CN113666686A (en) * | 2021-08-20 | 2021-11-19 | 西南石油大学 | Selective water plugging agent and method for long-term oil stabilization and water control in oil and gas fields with high temperature and high pressure resistance |
| CN118754712A (en) * | 2024-07-18 | 2024-10-11 | 四川兰冠能源科技有限公司 | A selective water plugging agent and preparation method thereof |
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Application publication date: 20100526 |