CN102127416B - Anionic surfactant type acid fracturing fluid and preparation method thereof - Google Patents
Anionic surfactant type acid fracturing fluid and preparation method thereof Download PDFInfo
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- CN102127416B CN102127416B CN 201010554267 CN201010554267A CN102127416B CN 102127416 B CN102127416 B CN 102127416B CN 201010554267 CN201010554267 CN 201010554267 CN 201010554267 A CN201010554267 A CN 201010554267A CN 102127416 B CN102127416 B CN 102127416B
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Abstract
The invention relates to anionic surfactant type acid fracturing fluid and a preparation method thereof. The anionic surfactant type acid fracturing fluid is characterized by comprising the following components in part by mass: 22 to 32 parts of alkyl benzene sulfonic acid, 20 to 30 parts of sodium alkyl sulfate, 55 to 60 parts of cosolvent, 50 to 60 parts of cross-linking agent, 20 to 25 parts of water and 390 to 400 parts of acidic solvent, wherein the cosolvent is a mixture of short chain hydrocarbons which mainly include isooctane; the cross-linking agent is a linear chain alcohol having 12 to 16 carbon atoms; and the acidic solvent is 36 to 38-percent mixture of hydrochloric acid and water in a volume ratio of 1:9. The performance of the anionic surfactant type acid fracturing fluid is higher than the conventional high polymer fracturing fluid. According to test result, the PH value of the fracturing fluid system is about 1, the acidifying effect is high, the viscoelasticity is high, and the fluid carrying and gel breaking effects are high. The anionic surfactant type acid fracturing fluid can be used in fracturing exploitation of hypotonic oil fields, and has the characteristics of low cost, high backflow rate, no residue, cleanness, high efficiency and the like.
Description
Technical field
The preparation method of the anionic surfactant type acid fracturing fluid that uses when the present invention relates to fracturing yield increasing in the recovery process of a kind of low-permeability oil gas field.
Background technology
The oil recovery rate of China's low-permeability oil deposit is low, and the stable yields difficulty is large, and fracturing technique is rapid as Main Yield-increasing, the development of augmented injection method of hydrocarbon-bearing pool.Fracturing liquid is the important component part of fracturing technique, and commonly used is aqueous fracturing fluid both at home and abroad, comprises macromole fracturing liquid and viscoelastic surfactant (VES) fracturing liquid etc.
Progress along with hydraulic fracturing technology, for making propping agent reach deep penetration, the macromole fracturing liquid abroad begins one's study from the end of the sixties, such fracturing liquid viscosity is high, it is effective to take sand, has satisfied preferably pressure break demand at that time, but also has many shortcomings: such as because the host molecular weight is large, dispersing and dissolving is poor in water, and utilization ratio is lower; After pressure break finishes, quite a few insolubles and not thoroughly the macromole of broken glue remain in the formation fracture, make zone permeability decline; The row of returning of polymer fracturing fluid leads lower, and formation contaminant is serious.At the beginning of the nineties, viscoelastic surfactant begins to substitute macromole and becomes fracturing liquid host, and such fracturing liquid mainly is comprised of VES and salt solution.Because VES is easy to dissolve in salt solution, system is little and can keep good flow conductivity to the nocuity on stratum.
In recent years, domestic and international various viscoelastic surfactant fracturing liquid prescription continues to bring out, host mainly contains following several: long chain alkyl ammonium salt type cats product, betaine type amphoteric surfac-tant, nonionogenic tenside and anion surfactant.Using more is to adopt quaternary ammonium salt as thickening host, and this kind fracturing liquid becomes colloidality, heat-resisting property good, and synthesis technique is ripe and cheap, has therefore obtained general application.
Along with each large oil-gas mining company to the attention of environment protection and the raising that the oil-gas field Sustainable Exploitation is required, how further to reduce clean fracturing fluid the injury on stratum become the important research direction.Along with going deep into of using, the investigator finds cats product, although long chain quaternary class tensio-active agent excellent property particularly, also there are some problems, such as in the stratum, producing easily Adsorption And Retention, thereby have a strong impact on recovery ratio, certain bio-toxicity etc. is arranged.Most of anion surfactants are difficult to form vermiculate glues under strong acid environment, and system viscosity is low, can't satisfy the pressure break requirement.
Summary of the invention
The technical problem that solves
For fear of the deficiencies in the prior art part, the present invention proposes a kind of anionic surfactant type acid fracturing fluid and preparation method thereof, and this fracturing liquid can increase the row's of returning ability when satisfying conventional crush properties requirement, avoid the injury to the stratum.
Thought of the present invention is: the amphipathic molecule that the anion surfactant alkyl benzene sulphonate (ABS) is comprised of oleophylic alkylbenzene and hydrophilic sulfonate radical, the amphipathic molecule that sodium alkyl sulfate is comprised of oleophylic chain alkyl and hydrophilic sulfate radical, the oleophilic group of two materials and short chain alkanes connect, hydrophilic group sulfonate radical, sulfate radical and water connect, form micellar structure, the existence of organic crosslinking agent has reduced the repulsive interaction between surface active agent ion, more tensio-active agent is entered in the micella, promoted the growth of vermiculate glues, visco-elasticity appears in system.
Technical scheme
A kind of anionic surfactant type acid fracturing fluid is characterized in that component is alkyl benzene sulphonate (ABS) 22-32 part, sodium alkyl sulfate 20-30 part, solubility promoter 55-60 part, linking agent 50-60 part, water 20-25 part and acid solvent 390-400 part; Described solubility promoter is as main short hydrocarbon mixture take octane-iso; Described linking agent is the straight chain alcohol of 12-16 carbon atom; Described acid solvent is the hydrochloric acid of 36%-38% and the mixture of water, and the volume ratio of hydrochloric acid and water is 1: 9; Described part is mass parts.
Described take octane-iso as main short hydrocarbon mixture as 90# gasoline, 93# gasoline or 97# gasoline.
The carbonatoms of described alkyl benzene sulphonate (ABS) is 10-13.
The carbonatoms of described sodium alkyl sulfate is 10-13.
A kind of method for preparing anionic surfactant type acid fracturing fluid is characterized in that step is as follows:
Step 1: the alkyl benzene sulphonate (ABS) that will take by weighing in mass ratio, sodium alkyl sulfate and solubility promoter mix, and preserve 90-100 hour in the normal temperature sealing;
Step 2: the water that adds 50-60 part linking agent and 20-25 part mixes rearmounted 40-50 hour;
Step 3: add again acid solvent 390-400 part and obtain anionic surfactant type acid fracturing fluid.
A kind of method of using anionic surfactant type acid fracturing fluid, it is characterized in that: the acid solvent of anionic surfactant type acid fracturing fluid and 140-150 mass parts is mixed, add the gel breaker that the parcel of the haydite of 15%-30% mass parts and 1%-3% mass parts is processed, the rear notes well that stirs uses again; The step of the gel breaker that described parcel is processed is: metering takes by weighing 85% hexalin, 3% anhydrous calcium oxide or calcium chloride, place container, be stirred to its whole dissolvings, add again 12% magnesium oxide, be mixed, indoor airing 50-80 hour to complete drying, broken, sieving obtains wrapping up the gel breaker of processing.
Hexalin is replaced by isopropylcarbinol or the trimethyl carbinol in the gel breaker that described parcel is processed.
Beneficial effect
A kind of anionic surfactant type acid fracturing fluid that the present invention proposes and preparation method thereof, anion surfactant type fracturing liquid and acid-fracture technology combine, system not only has the series of advantages of clean fracturing fluid, and because the silicates material band identical charges in anion surfactant and the most of oil reservoir, fracturing liquid is little to stratum absorption, injures little.
Fracturing liquid among the present invention has following features:
1, easy and simple to handle, raw material sources are abundant, and are with low cost.
2, acid resistance is good, and viscosity still remains on more than the 100mpa.s under strong acid environment;
3, the heatproof endurance of cutting is good, and 70 ℃, 170S
-1Shearing rate down cut 90min, viscosity remains on 100mpa.s;
4, taking grittiness can be excellent, easily broken glue, the easily row of returning.
5, the required starting material consumption of prescription is few, and cost is low.
Embodiment
Now the invention will be further described in conjunction with the embodiments:
Embodiment 1:
Preparation anionic surfactant type acid fracturing fluid: take by weighing in mass ratio Witco 1298 Soft Acid 2.4g, sodium lauryl sulphate 2.1g, 93# gasoline 5.5g places container, be mixed, the normal temperature sealing was preserved 96 hours, added 5g lauryl alcohol and 2g water to above-mentioned sample; After 48 hours, add acid solvent 39.7g and obtain anionic surfactant type acid fracturing fluid for subsequent use.
The gel breaker that parcel is processed: metering takes by weighing 85% hexalin, 3% anhydrous calcium oxide or calcium chloride, places container, is stirred to its whole dissolvings, add again 12% magnesium oxide, be mixed, indoor airing 50-80 hour to complete drying, broken, sieving obtains wrapping up the gel breaker of processing; Described hexalin is replaced by isopropylcarbinol or the trimethyl carbinol.
When using pressing crack construction, get the acid solvent that reserve liquid adds 14.2g again, add the gel breaker that the parcel of the haydite of 15%-30% mass parts and 1%-3% mass parts is processed again, the rear notes well that stirs uses.
Above-mentioned fracturing liquid performance obtained in laboratory test result is as follows:
Detecting instrument: 2NN-D6S type six fast rotational viscosimeters, the sensible instrumentation factory in sea, Qingdao.
(1) temperature and viscosity relationship are measured
The relation of table one temperature and viscosity is measured
| Temperature | Viscosity (mpa.s of unit) |
| 30℃ | 245 |
| 40℃ | 245 |
| 50℃ | 230 |
| 60℃ | 225 |
| 70℃ | 220 |
[0038](2), high thermal resistance is measured
Temperature tolerance is measured under table two quiescent conditions
| Temperature (℃) | 70(30min) | 70(60min) | 70(90min) |
| Viscosity (mpa.s) | 220 | 215 | 215 |
(3), endurance of cutting can be measured
Temperature tolerance is measured under table three shearing condition
| Temperature (℃) | 70 | 70 | 70 | 70 |
| Tolerance time (min) | 30 | 60 | 90 | 120 |
| Shearing rate (170S -1) | 170 | 170 | 170 | 170 |
| Viscosity (mpa.s) | 240 | 230 | 220 | 220 |
Acidic fracturing fluid is in the temperature-rise period of normal temperature to 70 ℃, and viscosity remains at more than the 200mpa.s.Acidic fracturing fluid is at 70 ℃ of static 90min, and viscosity remains on more than the 200mpa.s.Acidic fracturing fluid is sheared 90min at 70 ℃, and viscosity remains on more than the 200mpa.s.Above-mentioned performance satisfies the conventional of the fracturing fluid sand requirement of taking.
Embodiment 2:
Preparation anionic surfactant type acid fracturing fluid: take by weighing in mass ratio Witco 1298 Soft Acid 3.2g, sodium lauryl sulphate 3.0g, 93# gasoline 6.0g places container, be mixed, the normal temperature sealing is preserved, and after 96 hours, adds 5g lauryl alcohol and 2g water to above-mentioned sample; After 48 hours, add acid solvent 39g and obtain anionic surfactant type acid fracturing fluid for subsequent use.
The gel breaker that parcel is processed: metering takes by weighing 85% hexalin, 3% anhydrous calcium oxide or calcium chloride, places container, is stirred to its whole dissolvings, add again 12% magnesium oxide, be mixed, indoor airing 50-80 hour to complete drying, broken, sieving obtains wrapping up the gel breaker of processing; Described hexalin is replaced by isopropylcarbinol or the trimethyl carbinol.
When using pressing crack construction, get the acid solvent that reserve liquid adds 14.2g again, add the gel breaker that the parcel of the haydite of 15%-30% mass parts and 1%-3% mass parts is processed again, the rear notes well that stirs uses.
Above-mentioned fracturing liquid performance obtained in laboratory test result is as follows:
(1) temperature and viscosity relationship are measured
The relation of table four temperature and viscosity is measured
| Temperature | Viscosity (mpa.s of unit) |
| 30℃ | 255 |
| 40℃ | 255 |
| 50℃ | 240 |
| 60℃ | 235 |
| 70℃ | 230 |
(2), high thermal resistance is measured
Temperature tolerance is measured under table five quiescent conditions
| Temperature (℃) | 70(30min) | 70(60min) | 70(90min) |
| Viscosity (mpa.s) | 230 | 220 | 220 |
(3), endurance of cutting can be measured
Temperature tolerance is measured under table six shearing condition
| Temperature (℃) | 70 | 70 | 70 | 70 |
| Tolerance time (min) | 30 | 60 | 90 | 120 |
| Shearing rate (170S -1) | 170 | 170 | 170 | 170 |
| Viscosity (mpa.s) | 250 | 240 | 230 | 230 |
Acidic fracturing fluid is in the temperature-rise period of normal temperature to 70 ℃, and viscosity remains at more than the 200mpa.s.Acidic fracturing fluid is at 70 ℃ of static 90min, and viscosity remains on more than the 200mpa.s.Acidic fracturing fluid is sheared 90min at 70 ℃, and viscosity remains on more than the 200mpa.s.Above-mentioned performance satisfies the conventional of the fracturing fluid sand requirement of taking.Compare example (1), because the consumption of anion surfactant and solubility promoter increases, system viscosity increases.
Implement real 3:
Preparation anionic surfactant type acid fracturing fluid: take by weighing in mass ratio Witco 1298 Soft Acid 3.0g, sodium lauryl sulphate 2.8g, 93# gasoline 5.8g places container, be mixed, the normal temperature sealing was preserved 96 hours, added 5g lauryl alcohol and 2g water to above-mentioned sample; After 48 hours, add acid solvent 39g and obtain anionic surfactant type acid fracturing fluid for subsequent use.
The gel breaker that parcel is processed: metering takes by weighing 85% hexalin, 3% anhydrous calcium oxide or calcium chloride, places container, is stirred to its whole dissolvings, add again 12% magnesium oxide, be mixed, indoor airing 50-80 hour to complete drying, broken, sieving obtains wrapping up the gel breaker of processing; Described hexalin is replaced by isopropylcarbinol or the trimethyl carbinol.
When using pressing crack construction, get the acid solvent that reserve liquid adds 14.2g again, add the gel breaker that the parcel of the haydite of 15%-30% mass parts and 1%-3% mass parts is processed again, the rear notes well that stirs uses.
Above-mentioned fracturing liquid performance obtained in laboratory test result is as follows:
(1) temperature and viscosity relationship are measured
The relation of table seven temperature and viscosity is measured
| Temperature | Viscosity (mpa.s of unit) |
| 30℃ | 250 |
| 40℃ | 250 |
| 50℃ | 235 |
| 60℃ | 225 |
| 70℃ | 220 |
(2), high thermal resistance is measured
Temperature tolerance is measured under table eight quiescent conditions
| Temperature (℃) | 70(30min) | 70(60min) | 70(90min) |
| Viscosity (mpa.s) | 220 | 220 | 215 |
(3), endurance of cutting can be measured
Temperature tolerance is measured under table nine shearing condition
| Temperature (℃) | 70 | 70 | 70 | 70 |
| Tolerance time (min) | 30 | 60 | 90 | 120 |
| Shearing rate (170S -1) | 170 | 170 | 170 | 170 |
| Viscosity (mpa.s) | 240 | 235 | 225 | 220 |
Acidic fracturing fluid is in the temperature-rise period of normal temperature to 70 ℃, and viscosity remains at more than the 200mpa.s.Acidic fracturing fluid is under 70 ℃ of static 90min and shearing 90min condition, and viscosity remains on more than the 200mpa.s.Above-mentioned performance satisfies the conventional of the fracturing fluid sand requirement of taking.Compare example (1) (2), because the consumption of anion surfactant and solubility promoter is placed in the middle, system viscosity falls between.
Claims (7)
1. an anionic surfactant type acid fracturing fluid is characterized in that component is alkyl benzene sulphonate (ABS) 22-32 part, sodium alkyl sulfate 20-30 part, solubility promoter 55-60 part, linking agent 50-60 part, water 20-25 part and acid solvent 390-400 part; Described solubility promoter is as main short hydrocarbon mixture take octane-iso; Described linking agent is the straight chain alcohol of 12-16 carbon atom; Described acid solvent is the hydrochloric acid of 36%-38% and the mixture of water, and the volume ratio of hydrochloric acid and water is 1: 9; Described part is mass parts.
2. anionic surfactant type acid fracturing fluid according to claim 1 is characterized in that: described take octane-iso as main short hydrocarbon mixture as 90# gasoline, 93# gasoline or 97# gasoline.
3. anionic surfactant type acid fracturing fluid according to claim 1, it is characterized in that: the carbonatoms of described alkyl benzene sulphonate (ABS) is 10-13.
4. anionic surfactant type acid fracturing fluid according to claim 1, it is characterized in that: the carbonatoms of described sodium alkyl sulfate is 10-13.
5. method for preparing described any anionic surfactant type acid fracturing fluid of claim 1～4 is characterized in that step is as follows:
Step 1: the alkyl benzene sulphonate (ABS) that will take by weighing in mass ratio, sodium alkyl sulfate and solubility promoter mix, and preserve 90-100 hour in the normal temperature sealing;
Step 2: the water that adds 50-60 part linking agent and 20-25 part mixes rearmounted 40-50 hour;
Step 3: add again acid solvent 390-400 part and obtain anionic surfactant type acid fracturing fluid.
6. a right to use requires the method for 1～4 described any anionic surfactant type acid fracturing fluid, it is characterized in that: the acid solvent of anionic surfactant type acid fracturing fluid and 140-150 mass parts is mixed, add the gel breaker that the parcel of the haydite of 15%-30% mass parts and 1%-3% mass parts is processed, the rear notes well that stirs uses again; The step of the gel breaker that described parcel is processed is: metering takes by weighing 85% hexalin, 3% anhydrous calcium oxide or calcium chloride, place container, be stirred to its whole dissolvings, add again 12% magnesium oxide, be mixed, indoor airing 50-80 hour to complete drying, broken, sieving obtains wrapping up the gel breaker of processing.
7. the using method of anionic surfactant type acid fracturing fluid according to claim 6 is characterized in that: hexalin is replaced by isopropylcarbinol or the trimethyl carbinol in the gel breaker that described parcel is processed.
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| CN110819333B (en) * | 2019-11-19 | 2021-09-03 | 西安石油大学 | Intelligent oil displacement agent capable of automatically finding oil and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020023752A1 (en) * | 1996-10-09 | 2002-02-28 | Qi Qu | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations |
| CN101705083A (en) * | 2009-11-16 | 2010-05-12 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020023752A1 (en) * | 1996-10-09 | 2002-02-28 | Qi Qu | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations |
| CN101705083A (en) * | 2009-11-16 | 2010-05-12 | 山东德仕化工集团有限公司 | Formulation of surfactant oil displacement system for anionic and nonionic oil displacement |
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