CN103980877A - Coal-bed gas well foam fracturing fluid system and preparation method thereof - Google Patents
Coal-bed gas well foam fracturing fluid system and preparation method thereof Download PDFInfo
- Publication number
- CN103980877A CN103980877A CN201410230530.5A CN201410230530A CN103980877A CN 103980877 A CN103980877 A CN 103980877A CN 201410230530 A CN201410230530 A CN 201410230530A CN 103980877 A CN103980877 A CN 103980877A
- Authority
- CN
- China
- Prior art keywords
- active agent
- tensio
- gas well
- bed gas
- foam fracturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/703—Foams
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
Abstract
The invention relates to a coal-bed gas well foam fracturing fluid system, in particular to a foam fracturing fluid system which can adequately carry the sand, rapidly discharge the sand and reduce the harm on a coal bed when a coal-bed gas well is fractured and does not contain a macromolecular foam stabilizer, and a preparation method thereof. The coal-bed gas well foam fracturing fluid system is prepared by the following raw material components by mass percent: 1 to 3 percent of inorganic salt, 0.1 to 0.3 percent of SSN surface active agent, 0.2 to 0.4 percent of FK-18 surface active agent, 0.5 to 0.7 percent of RX-013 surface active agent and 95.6 to 98.2 percent of water. The foam fracturing fluid system is simple in formula and has no foam stabilizer, so that the harm on the coal bed can be further reduced on the basis of the characteristics of the foam fracturing fluid.
Description
Technical field
The present invention relates to a kind of coal bed gas well foam fracturing liquid system, be specifically related to a kind of can reaching and fully take sand, rapid anti-row, minimizing coal seam injury object when coal bed gas well pressure break, do not contain foam fracturing liquid system of macromole suds-stabilizing agent and preparation method thereof.
Background technology
Reservoiring Mechanism of Coalbed Methane is complicated, and reservoir matrix has the feature of obvious low hole, hypotonic, low gas content saturation ratio; Young's modulus is little, Poisson's ratio is large, easily produces distortion; Extremely grow in joint, the crack in coal seam; Coal seam is very strong adsorption medium, very easily comes to harm.These features in coal seam make the as easy as rolling off a log absorption outside fluid in coal seam, cause the obstruction of coal seam hole and the expansion of matrix, thereby have a strong impact on gas production rate.
If conventional coal bed gas well is difficult to obtain production capacity without fracturing reform, this just has very high requirement to bringing the fracturing liquid on stratum into.In linear fracturing fluid, contain a large amount of macromolecular substance; In crosslinked fracturing liquid, all contain a large amount of macromolecular substance, but be not easy brokenly glue under the low temperature of coal seam; The broken glue of clean fracturing fluid is thorough, but cost is high.
The most popular active water fracturing liquid of coal bed fracturing, because viscosity is low, is taken sand difficulty at present, needs large discharge capacity, easily causes coal dust migration obstruction.Foamed fracturing fluid is little with its dehydration, prop-carrying capacity by force, anti-feature of arranging energy foot, in coal bed gas well pressure break, have good application prospect.
But conventional foamed fracturing fluid is such as foamed fracturing fluid, also be to add suds-stabilizing agent to make at existing linear glue, cross-linked rubber, clean fracturing fluid on as suds-stabilizing agent basis, but the problem that the macromolecular substance existing in suds-stabilizing agent easily adsorbs, is not easy brokenly under the low temperature of coal seam glue still exists.
Summary of the invention
The object of the present invention is to provide a kind of coal bed gas well foam fracturing liquid system, this foam fracturing fluid viscosity is high, prop-carrying capacity is strong, dehydration is little, it is little that coal seam is injured, and utilizes the smooth anti-row of self residual amount of energy when can bring propping agent into stratum.
Another object of the present invention is also to provide a kind of preparation method of coal bed gas well foam fracturing liquid system.
The object of the present invention is achieved like this, and a kind of coal bed gas well foam fracturing liquid system is formulated by the feed composition of following mass percent: inorganic salt 1-3%; SSN tensio-active agent 0.1-0.3%; FK-18 tensio-active agent 0.2-0.4%; RX-013 tensio-active agent 0.5-0.7%; Water 95.6-98.2%.
Wherein, SSN tensio-active agent is sodium lauryl sulphate, and FK-18 tensio-active agent is the WD-18 that Fukang, Guanghan company produces, the WZJ-013 that RX-013 tensio-active agent Wei Rongxin company produces.Three kinds are mixed and used, and lather volume and transformation period are best, and the total concentration after three kinds of pore forming materials being mixed according to said ratio is not high yet, is 1%.
The method of particularly, testing coal bed gas well foam fracturing liquid system performance provided by the invention is:
The foamed fracturing fluid of 100mL volume is poured in slurry cup, with high speed agitator, at >=5000r/min, stirred 1min under at a high speed, the foam of foaming is poured in 500mL graduated cylinder, record lather volume and record that to separate out the semiliquid time used be half foam life period.
Test-results shows:
Because foam fracturing liquid system of the present invention is not containing macromole suds-stabilizing agent, do not need to be cross-linked, so there is not the problem of broken glue difficulty under the cold condition of coal seam; Foam fracturing liquid system of the present invention is at 170s
-1down cut 2h can keep 100MPa.s high viscosity, and prop-carrying capacity is strong; Foam fracturing liquid system froth quality of the present invention is 75%-80%, and water content is low, viscosity is high, almost without dehydration.Feature of the present invention is: the present invention relates to a kind of coal bed gas well foam fracturing liquid system.This foamed fracturing fluid is mixed by certain mass percent by a kind of inorganic salt, three kinds of tensio-active agents and clear water.The invention solves the problem that in fracturing liquid, other fracturing liquid rubber-breaking is difficult, prop-carrying capacity is little, dehydration is large for current coal-seam gas, owing to not containing suds-stabilizing agent in foam fracturing liquid system, also greatly reduced the problem of coal seam injury.
Further, formulated by the feed composition of following mass percent: inorganic salt 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Water 97%.
Further, in order to reduce the impact of water on the finished product performance, preferably, described water is deionized water.
Further, described inorganic salt are any one or the multiple combination in sodium-chlor, ammonium chloride, Repone K.
The best Repone K that uses of described inorganic salt, best working concentration is 2%; The best working concentration of described SSN tensio-active agent is 0.1%; The best working concentration of described FK-18 tensio-active agent is 0.3%; The best working concentration of described RX-013 tensio-active agent is 0.6%; Described water is preferably deionized water, and best working concentration is 97%.
Foamed fracturing fluid system formulation in the present invention is simple, without suds-stabilizing agent, on the basis of the existing feature of foamed fracturing fluid, further reduced the injury to coal seam.
The preparation method of a kind of coal bed gas well foam fracturing liquid system provided by the invention, comprises the steps:
Step 1. is mixed the described inorganic salt of default per-cent and described water, is stirred to described inorganic salt and dissolves completely, is mixed with salt solution;
Step 2. joins the described tensio-active agent SSN of default per-cent in described salt solution, fully stirs until the first mixed solution is made in dissolving;
Step 3. adds the described tensio-active agent FK-18 of default per-cent in described the first mixed solution, makes the second mixed solution;
Step 4. joins the described surfactant R X-013 of default per-cent in described the second mixed solution, makes coal bed gas well foam fracturing liquid system.
The foamed fracturing fluid of making by this preparation method, compared with prior art has following features: foamed fracturing fluid composition is few, and formula is simple, and froth quality is high, and viscosity is high, and prop-carrying capacity is strong; Not containing macromolecular substance, little to coal seam pollution, dehydration is little, has further reduced the risk of polluting reservoir; And with low cost, preparation technology is simple.
Accompanying drawing explanation
Flow curve when Fig. 1 is foamed fracturing fluid optimum concn provided by the invention;
Fig. 2 is the preparation flow figure of a kind of coal bed gas well foam fracturing liquid system provided by the invention.
Embodiment
Below by specific embodiment, also by reference to the accompanying drawings the present invention is described in further detail.
A coal bed gas well foam fracturing liquid system, formulated by the feed composition of following mass percent: inorganic salt 1-3%; SSN tensio-active agent 0.1-0.3%; FK-18 tensio-active agent 0.2-0.4%; RX-013 tensio-active agent 0.5-0.7%; Water 95.6-98.2%.
Wherein, SSN tensio-active agent is sodium lauryl sulphate, FK-18 tensio-active agent is the WD-18 that Fukang, Guanghan company produces, the WZJ-013 that RX-013 tensio-active agent Wei Rongxin company produces, three kinds are mixed and used, lather volume and transformation period are best, and the total concentration after three kinds of pore forming materials being mixed according to said ratio is not high yet, is 1%.
The method of particularly, testing coal bed gas well foam fracturing liquid system performance provided by the invention is:
The foamed fracturing fluid of 100mL volume is poured in slurry cup, with high speed agitator, at >=5000r/min, stirred 1min under at a high speed, the foam of foaming is poured in 500mL graduated cylinder, record lather volume and record that to separate out the semiliquid time used be half foam life period.
Test-results shows:
Because foam fracturing liquid system of the present invention is not containing macromole suds-stabilizing agent, do not need to be cross-linked, so there is not the problem of broken glue difficulty under the cold condition of coal seam; Foam fracturing liquid system of the present invention can keep 100MPa.s high viscosity at 170s-1 down cut 2h, and prop-carrying capacity is strong; Foam fracturing liquid system froth quality of the present invention is 75%-80%, and water content is low, viscosity is high, almost without dehydration.Feature of the present invention is: the present invention relates to a kind of coal bed gas well foam fracturing liquid system.This foamed fracturing fluid is mixed by certain mass percent by a kind of inorganic salt, three kinds of tensio-active agents and clear water.The present invention has solved the problem that in fracturing liquid, other fracturing liquid rubber-breaking is difficult, prop-carrying capacity is little, dehydration is large for current coal-seam gas preferably, owing to not containing suds-stabilizing agent in foam fracturing liquid system, has also greatly reduced the problem of coal seam injury.
Preferably, formulated by the feed composition of following mass percent: inorganic salt 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Water 97%.
In order to reduce water quality for the impact of final product performance, preferably water is deionized water.
Preferably, described inorganic salt are any one or the multiple combination in sodium-chlor, ammonium chloride, Repone K.
The best Repone K that uses of described inorganic salt, best working concentration is 2%; The best working concentration of described SSN tensio-active agent is 0.1%; The best working concentration of described FK-18 tensio-active agent is 0.3%; The best working concentration of described RX-013 tensio-active agent is 0.6%; Described water is preferably deionized water, and best working concentration is 97%.
Foamed fracturing fluid system formulation in the present invention is simple, without suds-stabilizing agent, on the basis of the existing feature of foamed fracturing fluid, further reduced the injury to coal seam.
The preparation method of a kind of coal bed gas well foam fracturing liquid system provided by the invention, as shown in Figure 2, comprises the steps:
Step 1. is mixed the described inorganic salt of default per-cent and described water, is stirred to described inorganic salt and dissolves completely, is mixed with salt solution;
Step 2. joins the described tensio-active agent SSN of default per-cent in described salt solution, fully stirs until the first mixed solution is made in dissolving;
Step 3. adds the described tensio-active agent FK-18 of default per-cent in described the first mixed solution, makes the second mixed solution;
Step 4. joins the described surfactant R X-013 of default per-cent in described the second mixed solution, makes coal bed gas well foam fracturing liquid system.
The present invention compared with prior art, has following characteristics: foamed fracturing fluid composition is few, and formula is simple; Froth quality is high, and viscosity is high, and prop-carrying capacity is strong; Not containing macromolecular substance, to coal seam, pollute little; Dehydration is little, has further reduced the risk of polluting reservoir, and with low cost, and preparation technology is simple.
Embodiment 1:
Inorganic salt Repone K 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Clear water 97%.
2% Repone K is joined in 97% clear water, mix, form transparent salt brine solution, to the SSN tensio-active agent that adds 0.1% in salt brine solution, stir until SSN dissolves completely, add respectively wherein again 0.3% tensio-active agent FK-18 and 0.6% surfactant R X-013, stir, form foamed fracturing fluid.
Inorganic salt Repone K in embodiment belongs to market sale Industrial products, and embodiment 1 is foamed fracturing fluid preferred plan of the present invention.
Embodiment 2:
Inorganic salt ammonium chloride 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Clear water 97%.2% ammonium chloride is joined in 97% clear water, mix, form transparent salt brine solution, to the SSN tensio-active agent that adds 0.1% in salt brine solution, stir until SSN dissolves completely, add respectively wherein again 0.3% tensio-active agent FK-18 and 0.6% surfactant R X-013, stir, form foamed fracturing fluid.
Embodiment 3:
Inorganic salt Repone K 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.4%; RX-013 tensio-active agent 0.5%; Clear water 97%.2% Repone K is joined in 97% clear water, mix, form transparent salt brine solution, to the SSN tensio-active agent that adds 0.1% in salt brine solution, stir until SSN dissolves completely, add respectively wherein again 0.4% tensio-active agent FK-18 and 0.5% surfactant R X-013, stir, form foamed fracturing fluid.
Embodiment 4:
Inorganic salt sodium-chlor 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Clear water 97%.2% sodium-chlor is joined in 97% clear water, mix, form transparent salt brine solution, to the SSN tensio-active agent that adds 0.1% in salt brine solution, stir until SSN dissolves completely, add respectively wherein again 0.3% tensio-active agent FK-18 and 0.6% surfactant R X-013, stir, form foamed fracturing fluid.
Embodiment 5:
Inorganic salt Repone K 3%; SSN tensio-active agent 0.15%; FK-18 tensio-active agent 0.35%; RX-013 tensio-active agent 0.5%; Clear water 97.5%.3% Repone K is joined in 96% clear water, mix, form transparent salt brine solution, to the SSN tensio-active agent that adds 0.15% in salt brine solution, stir until SSN dissolves completely, add respectively wherein again 0.35% tensio-active agent FK-18 and 0.5% surfactant R X-013, stir, form foamed fracturing fluid.
The foamed fracturing fluid obtaining in embodiment 1-5, through experimental results show that: the foamed fracturing fluid of embodiment 1 records lather volume 470mL by Waring Blengder method, froth quality 78.7%, half foam life period 4000s, to coal heart permeability injury rate, be 15%, effect is best.Use foamed fracturing fluid lather volume that other formula obtains at 400-500ml, froth quality is at 75%-80%, and half foam life period is at 3000-4000s, to coal heart permeability injury at 10-20%.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. a coal bed gas well foam fracturing liquid system, is characterized in that: the feed composition by following mass percent is formulated: inorganic salt 1-3%; SSN tensio-active agent 0.1-0.3%; FK-18 tensio-active agent 0.2-0.4%; RX-013 tensio-active agent 0.5-0.7%; Water 95.6-98.2%.
2. a kind of coal bed gas well foam fracturing liquid system according to claim 1, is characterized in that:
Feed composition by following mass percent is formulated: inorganic salt 2%; SSN tensio-active agent 0.1%; FK-18 tensio-active agent 0.3%; RX-013 tensio-active agent 0.6%; Water 97%.
3. a kind of coal bed gas well foam fracturing liquid system according to claim 1 and 2, is characterized in that:
Described water is deionized water.
4. a kind of coal bed gas well foam fracturing liquid system according to claim 3, is characterized in that:
Described inorganic salt are any one or the multiple combination in sodium-chlor, ammonium chloride, Repone K.
5. the preparation method of a kind of coal bed gas well foam fracturing liquid system according to claim 4, is characterized in that: comprise the steps:
Step 1. is mixed the described inorganic salt of default per-cent and described water, is stirred to described inorganic salt and dissolves completely, is mixed with salt solution;
Step 2. joins the described tensio-active agent SSN of default per-cent in described salt solution, fully stirs until the first mixed solution is made in dissolving;
Step 3. adds the described tensio-active agent FK-18 of default per-cent in described the first mixed solution, makes the second mixed solution;
Step 4. joins the described surfactant R X-013 of default per-cent in described the second mixed solution, makes coal bed gas well foam fracturing liquid system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230530.5A CN103980877B (en) | 2014-05-28 | 2014-05-28 | Coal-bed gas well foam fracturing fluid system and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410230530.5A CN103980877B (en) | 2014-05-28 | 2014-05-28 | Coal-bed gas well foam fracturing fluid system and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103980877A true CN103980877A (en) | 2014-08-13 |
| CN103980877B CN103980877B (en) | 2017-05-17 |
Family
ID=51273052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410230530.5A Active CN103980877B (en) | 2014-05-28 | 2014-05-28 | Coal-bed gas well foam fracturing fluid system and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103980877B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485827A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气集团公司 | Low-temperature micro-bubble drilling fluid foaming agent and application thereof |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| CN102766450A (en) * | 2012-08-15 | 2012-11-07 | 中国石油大学(华东) | Nitrogen foam fracturing fluid for coal bed methane and preparation method of nitrogen foam fracturing fluid |
-
2014
- 2014-05-28 CN CN201410230530.5A patent/CN103980877B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485827A (en) * | 2010-12-03 | 2012-06-06 | 中国石油天然气集团公司 | Low-temperature micro-bubble drilling fluid foaming agent and application thereof |
| CN102504788A (en) * | 2011-10-25 | 2012-06-20 | 中国石油天然气股份有限公司 | Foaming agent suitable for oil-field development |
| CN102766450A (en) * | 2012-08-15 | 2012-11-07 | 中国石油大学(华东) | Nitrogen foam fracturing fluid for coal bed methane and preparation method of nitrogen foam fracturing fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103980877B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102766450B (en) | Nitrogen foam fracturing fluid for coal bed methane and preparation method of nitrogen foam fracturing fluid | |
| CN103725277B (en) | A kind of fiber composite temporary plugging agent | |
| CN102031103A (en) | Fracturing fluid system of CO2 cleaning foam | |
| CN104927817B (en) | A kind of three-phase self-generating foam water shutoff agent | |
| CN104893702B (en) | One kind is used to contain H2The foam discharging agent of the water-producing gas well water pumping gas production of S gases | |
| CA2743637C (en) | Recyclable low solid content micro-bubble drilling fluid or completion fluid | |
| WO2008106695A3 (en) | Methods and compositions for fracturing subterranean formations | |
| RU2014120518A (en) | POROUS SPLITTING AGENT, ITS CONTAINING BATCH, COMPOSITION OF POROUS PACKING AGENT, METHOD FOR ITS USE AND METHOD FOR PRODUCING POROUS POPPING AGENT | |
| NO20080994L (en) | Non-cryogenic process for granulating polymer pressure loss agents | |
| CN104342095B (en) | A kind of from angry expandable foam frozen glue and preparation method thereof and application | |
| CA2541870A1 (en) | Methods of fracturing a subterranean formation using a ph dependent foamed fracturing fluid | |
| CN101531892B (en) | Ultra low temperature super guanidine gum fracturing fluid | |
| CN103275693A (en) | High-efficiency foaming agent for acidic CO2 foam fracturing system | |
| ES2661010T3 (en) | Procedure for the continuous production of spongy bodies from regenerated cellulose and a spongy body | |
| CN103265318A (en) | Powdery talcum foaming agent | |
| CN103160269A (en) | Water base guanidine gum fracturing fluid and preparation method thereof | |
| GB2581897A (en) | Pickering foam drilling fluids | |
| RU2534286C1 (en) | Drill mud for completion, development and well-workover operations in terrigenous reservoirs | |
| CN102120929A (en) | Preparation method of gas-well water controlling agent | |
| CN103436244A (en) | Composite unblocking agent and method for composite unblocking by using temporary blocking agent and composite unblocking agent | |
| DE602005025718D1 (en) | microcapsules | |
| CN102533242B (en) | Rapid viscosity breaker for surfactant fracturing fluid | |
| CN103980877A (en) | Coal-bed gas well foam fracturing fluid system and preparation method thereof | |
| BRPI1010441A2 (en) | viscoelastic fluids containing hydroxyethyl cellulose | |
| CN107722957A (en) | A kind of Application of weak gel profile agent based on cleaning fracturing outlet liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |