CN1204225C - Crude oil flowability improver - Google Patents
Crude oil flowability improver Download PDFInfo
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- CN1204225C CN1204225C CN 02123728 CN02123728A CN1204225C CN 1204225 C CN1204225 C CN 1204225C CN 02123728 CN02123728 CN 02123728 CN 02123728 A CN02123728 A CN 02123728A CN 1204225 C CN1204225 C CN 1204225C
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- nonionogenic tenside
- crude oil
- fatty alcohol
- sodium salt
- type nonionogenic
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Abstract
The present invention relates to a crude oil flowability improver, particularly to a crude oil flowability improver used in the processes of exploiting and transporting crude oil. The crude oil flowability improver is a five-component compound which comprises 20 to 65 wt% of AE-shaped non-ionic surface active agent, 3 to 20 wt% of TA-shaped non-ionic surface active agent, 1 to 10 wt% of SP-shaped non-ionic surface active agent, 20 to 60 wt% of fatty alcohol polyolxyethyleneether sodium sulfate and 3 to 30 wt% of sulfated fatty alcohol sodium salt. The crude oil flowability improver has the functions of emulsion breaking, pipe wall moistening, emulsification dispersion, emulsification paraffin control, etc.; the crude oil flowability improver reduces the flow resistance of produced liquid and has good inhibiting effect on the deposition of paraffin crystals.
Description
Technical field
The present invention relates to a kind of crude oil flowability improver, particularly relate to a kind of crude oil flowability improver in oil mining and crude oil transmission.
Background technology
High wax content oil and high colloid, asphaltic crude are failed in the process often owing to its viscosity causes the back pressure height greatly in exploitation and pipeline collection; When produced liquid in oil well from the shaft bottom extraction to ground, temperature constantly descends, and has the wax partial crystallization to go out when liquid stream temperature is lower than crude oil wax precipitation piont temperature, forms precipitation of paraffin at tube inner wall; Because temperature reduces, and especially when the extraction liquid temp was reduced near the condensation point temperature, viscosity of crude can increase significantly, cause the increase of oil pumper load, back pressure to raise, and then influence the efficient of oil pumper simultaneously, reduce the life-span of oil pumper, reduce the crude oil produced quantity.
At present, extraction liquid resistance to flow is separated out, reduced to high wax content oil and high colloid, asphaltic crude in order to prevent paraffin in exploitation and the defeated process of pipeline collection, mainly adopt heat energy method, water mixing method and chemical method.Chemical method wherein mainly is to make the brilliant modification of wax or crude oil is disperseed by adding chemical agent, forms the oil-in-water state, and form aqueous wetting film on tube wall, thereby reach the purpose of improving crude oil flow performance, viscosity reduction drag reduction.Use wax removing agent for crude oil water containing less than 20% low aqueous well and wax control; To water content is 20%～70% extraction crude oil, owing to mostly be water-in-oil (W/O) milk sap greatly, so employing emulsion splitter breakdown of emulsion viscosity reduction usually; Greater than 70% extraction crude oil, use the viscosity-depression agent viscosity reduction for water content.
The Chinese patent CN1048798C that on January 26th, 2000 was announced, paraffin inhibitor chemical based on high-water-cut oil-producing well and ground gathering pipeline is the main mechanism of action with the gathering that prevents crude oil in the liquid stream, discloses a kind of viscosity lowering antiwax agent that is used for high-water-cut oil-producing well and gathering pipeline and preparation method thereof.This viscosity lowering antiwax agent is five yuan of compounds, the weight proportion of its component is: fatty alcohol sulphuric acid fat sodium salt 0.1%～10%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt or aliphatic alcohol polyethenoxy ether carboxylate 50%～98%, amber acid ester sodium sulfonate 0.1%～10%, AE type nonionogenic tenside 1%～40%, SP type nonionogenic tenside 0.1%～10%.The main deficiency of this viscosity lowering antiwax agent is very little to the higher viscous crude effect of moisture lower crude oil (as 20～50%), particularly colloid, asphalt content.
Summary of the invention
The objective of the invention is provides a kind of crude oil flowability improver of being convenient to Oil extraction and crude oil transmission in order to overcome the deficiency that emulsion splitter viscosity reduction and viscosity-depression agent viscosity reduction exist.When crude oil water containing greater than 20%, particularly water content in crude oil reaches at 20%～50% o'clock, and extraction liquid exists with the water-in-oil state, and viscosity of crude is big, resistance to flow is big, suitably add the resistance to flow that crude oil flowability improver of the present invention can greatly reduce extraction liquid, reduce the defeated pressure of collection.
In order to achieve the above object, the crude oil flowability improver of the present invention's design is five yuan of compounds, comprises AE type nonionogenic tenside, TA type nonionogenic tenside, SP type nonionogenic tenside, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt, fatty alcohol sulphuric acid fat sodium salt; The weight proportion of its material is: AE type nonionogenic tenside 20%～65%, TA type nonionogenic tenside 3%～20%, SP type nonionogenic tenside 1%～10%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 20%～60%, fatty alcohol sulphuric acid fat sodium salt 3%～30%;
Wherein the general formula of AE type nonionogenic tenside is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of TA type nonionogenic tenside is:
Q is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of SP type nonionogenic tenside is:
Polymerization degree m1=10～40 in the formula, n1=200～400, m2=5～20;
The general formula of fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt is:
RO(CH
2CH
2O)
nSO
3Na
R is the straight chain or the branched alkyl of carbon number 6～18 in the formula, and best when the effect of R when being carbon number 12～15, n is 2～5;
The general formula of fatty alcohol sulphuric acid fat sodium salt is:
ROSO
3Na
R is the straight chain or the branched alkyl of carbon number 9～15 in the formula.
Crude oil flowability improver of the present invention has effects such as breakdown of emulsion, moistening tube wall, emulsification dispersion and emulsification wax control.This crude oil flowability improver is in pit shaft or in the gathering line, at first make water-in-oil (W/O) type emulsion breakdown or stop and form water-in-oil (W/O) type milk sap, during then with the extraction of extraction liquid, form aqueous wetting film at tube wall, extraction liquid is flowed with oil-in-water (O/W) state, not only reduced the resistance to flow of extraction liquid, and it is inhibited to the deposition of paraffin crystal, simultaneously, owing in prescription, added the emulsion splitter composition, after the liquid collection of extraction is transported to treatment station, can realize oily water separation fast.
Crude oil flowability improver of the present invention is applicable to that moisture various crude oil productions and collection greater than 20% is defeated, particularly high exploitation and collection sticking, crude oil with high solidifying point are defeated, can make its viscosity reduce more than 90%, on-the-spot oil well production back pressure reduces by 0.1～0.5MPa, thereby reduce the oil pumper energy consumption, improve crude production rate.
Embodiment
Crude oil flowability improver of the present invention is five yuan of compounds, comprises AE type nonionogenic tenside, TA type nonionogenic tenside, SP type nonionogenic tenside, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt, fatty alcohol sulphuric acid fat sodium salt; The weight proportion of its material is: AE type nonionogenic tenside 20%～65%, TA type nonionogenic tenside 3%～20%, SP type nonionogenic tenside 1%～10%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 20%～60%, fatty alcohol sulphuric acid fat sodium salt 3%～30%;
The general formula of AE type nonionogenic tenside is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of TA type nonionogenic tenside is:
Q is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of SP type nonionogenic tenside is:
Polymerization degree m1=10～40 in the formula, n1=200～400, m2=5～20;
The general formula of fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt is:
RO(CH
2CH
2O)
nSO
3Na
R is the straight chain or the branched alkyl of carbon number 6～18 in the formula, and best when the effect of R when being carbon number 12～15, n is 2～5;
The general formula of fatty alcohol sulphuric acid fat sodium salt is:
ROSO
3Na
R is the straight chain or the branched alkyl of carbon number 9～15 in the formula.
In crude oil flowability improver of the present invention, AE type nonionogenic tenside, fatty alcohol sulphuric acid fat sodium salt, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt are oil-in-water (O/W) the type emulsifying agent of excellent property dynamically the time, and when low temperature (particularly) has very strong stability to oil-in-water (O/W) type crude oil emulsion; TA type nonionogenic tenside is the emulsion splitter of excellent property water-in-oil (W/O) type crude oil emulsion, has the characteristics of fast dewatering; SP type nonionogenic tenside is the emulsion splitter of excellent property, and purifying water effect is splendid.
Embodiment:
When using crude oil flowability improver of the present invention, its addition is decided according to the rerum natura of crude oil, and addition is generally 100～700g/t
Oil, its indoor application effect mainly determines that by mensuration dehydration rate, observation profit dispersion state, mensuration viscosity break ratio effect of field application is mainly failed the main line back pressure by oil well or collection, produce oil, production fluid quantitative changeization are determined.
Embodiment 1: when viscosity of crude less than 3000mPas and moisture greater than 20%, or viscosity is greater than 3000mPas and moisture less than 50% o'clock, the weight proportion of its material is: AE type nonionogenic tenside 40%～60%, TA type nonionogenic tenside 10%～20%, SP type nonionogenic tenside 1%～5%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 20%～40%, fatty alcohol sulphuric acid fat sodium salt 3%～10%.
In test, the weight proportion of the crude oil flowability improver material that uses is: AE type nonionogenic tenside (adopting trade names AE8051) 52%, TA type nonionogenic tenside (adopting trade names TA1031) 14%, SP type nonionogenic tenside (adopting trade names SP169) 3.5%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt (adopting trade names AES) 26.5%, fatty alcohol sulphuric acid fat sodium salt (employing sodium lauryl sulphate) 4%.
Through checking:
The outward appearance weak yellow liquid
Density 0.9120g/cm
3
Condensation point-31 ℃
Application one: Dagang Oilfield operation one district, oil density 0.9364g/cm
3, viscosity 1379.93mPas, condensation point-8 ℃, the content of wax 4.9%, extraction crude oil water containing 40%; Indoor dosing 200g/t
OilBack test-results, profit homodisperse, dehydration rate 85% (50 ℃), viscosity break ratio 99%; Rig-site utilization result, dosing 200g/t
Oil, Oil Well Back Pressure is reduced to 0.5MPa by 0.8MPa, decline 0.3MPa.
Application two: Dagang Oilfield operation one district, pure oil viscosity 810mPas, moisture 55%, apart from transhipment station 5.5km, use crude oil flowability improver of the present invention, add from the ring set space of oil well, adding concentration is 0.25kg/t
Oil, system's back pressure is reduced to 0.35MPa by 0.7MPa, and decline 0.35MPa has stopped water mixing, has realized not heating, not water mixing normal temperature collection is defeated.
Embodiment 2: when viscosity of crude greater than 3000mPas, and it is moisture greater than 50% o'clock, the weight proportion of its material is: AE type nonionogenic tenside 20%～40%, TA type nonionogenic tenside 3%～10%, SP type nonionogenic tenside 1%～5%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 40%～60%, fatty alcohol sulphuric acid fat sodium salt 10%～30%.
In test, the weight proportion of the crude oil flowability improver material that uses is: AE type nonionogenic tenside (adopting trade names AE8051) 24%, TA type nonionogenic tenside (adopting trade names TA1031) 4%, SP type nonionogenic tenside (adopting trade names SP169) 2%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt (adopting trade names AES) 49%, fatty alcohol sulphuric acid fat sodium salt (employing sodium lauryl sulphate) 21%
Through checking:
The outward appearance weak yellow liquid
Density 0.9120g/cm
3
Condensation point-31 ℃
Application: Dagang Oilfield south company, the viscosity number that the thickest two mouthfuls of wells of crude oil are 50 ℃ is respectively 4518mPas and 3592mPas, all the other well viscosity are between 2000～3000mPas, former oil freezing point is all more than 24 ℃, the content of wax and gum asphalt belong to tangible high pour point and viscous crude oil all greater than 20%; Indoor dosing 400g/t
OilBack test-results, profit homodisperse, dehydration rate 81% (60 ℃), viscosity break ratio 97%; Rig-site utilization result (dosing 400g/t
Oil): 1. the reduction of system's back pressure is bigger, and the range of decrease is 0.2～0.5MPa, by 1.0～1.15MPa before the test, the minimum 0.67MPa that reduces to; 2. total oil offtake raises, and tests 51 days accumulative total and increases 406 tons of oil, increases liquid 1274m
3, increasing oily rate is 10.2%; 3. the electric current of oil well changes steadily, and is totally on a declining curve, and the motor power consumption is reduced, and efficiency of the pumping unit improves; 4. successfully carried out the effectively trial of downward modulation of watering quantity, subtracting the rate of mixing is 29%.
In the above-described embodiments, former oil quality is special, and is moisture lower, viscosity of crude all more than 500mPas, is used the prescription of existing patent CN1048798c, poor effect this moment, can not solve the high problem of situ production back pressure, use the present invention then to obtain good result.
Claims (3)
1. a crude oil flowability improver is five yuan of compounds, comprises AE type nonionogenic tenside, TA type nonionogenic tenside, SP type nonionogenic tenside, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt, fatty alcohol sulphuric acid fat sodium salt; The weight proportion of its material is:
AE type nonionogenic tenside 20%～65%,
TA type nonionogenic tenside 3%～20%,
SP type nonionogenic tenside 1%～10%,
Fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 20%～60%,
Fatty alcohol sulphuric acid fat sodium salt 3%～30%;
Wherein the general formula of AE type nonionogenic tenside is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of TA type nonionogenic tenside is:
Q is:
A represents the block polymerization ether of propylene oxide oxyethylene in the formula, and its structural formula is:
Polymerization degree L=4～7, m=10～100, n=10～50;
The general formula of SP type nonionogenic tenside is:
Polymerization degree m1=10～40 in the formula, n1=200～400, m2=5～20;
The general formula of fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt is:
RO(CH
2CH
2O)
nSO
3Na
R is the straight chain or the branched alkyl of carbon number 6～18 in the formula, and n is 2～5;
The general formula of fatty alcohol sulphuric acid fat sodium salt is:
ROSO
3Na
R is the straight chain or the branched alkyl of carbon number 9～15 in the formula.
2. crude oil flowability improver according to claim 1, when viscosity of crude less than 3000mPas and moisture greater than 20%, or viscosity is greater than 3000mPas and moisture less than 50% o'clock, the weight proportion of its material is: AE type nonionogenic tenside 40%～60%, TA type nonionogenic tenside 10%～20%, SP type nonionogenic tenside 1%～5%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 20%～40%, fatty alcohol sulphuric acid fat sodium salt 3%～10%.
3. crude oil flowability improver according to claim 1, when viscosity of crude greater than 3000mPas, and it is moisture greater than 50% o'clock, the weight proportion of its material is: AE type nonionogenic tenside 20%～40%, TA type nonionogenic tenside 3%～10%, SP type nonionogenic tenside 1%～5%, fatty alcohol-polyoxyethylene ether sulfuric acid ester sodium salt 40%～60%, fatty alcohol sulphuric acid fat sodium salt 10%～30%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123728 CN1204225C (en) | 2002-06-21 | 2002-06-21 | Crude oil flowability improver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123728 CN1204225C (en) | 2002-06-21 | 2002-06-21 | Crude oil flowability improver |
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|---|---|
| CN1388204A CN1388204A (en) | 2003-01-01 |
| CN1204225C true CN1204225C (en) | 2005-06-01 |
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|---|---|---|---|
| CN 02123728 Expired - Fee Related CN1204225C (en) | 2002-06-21 | 2002-06-21 | Crude oil flowability improver |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130762B (en) * | 2013-08-12 | 2017-02-08 | 中国石油化工股份有限公司 | Drag reducing agent for produced liquid of oil well |
| CN104327815A (en) * | 2014-11-05 | 2015-02-04 | 青岛蓬勃石油技术服务有限公司 | Paraffin inhibitor for petroleum extraction and preparation method thereof |
| CN106929113B (en) * | 2015-12-31 | 2018-08-10 | 中国石油天然气股份有限公司 | Polyolefin flow improver and preparation method and application thereof |
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2002
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