CN101020815A - Method of facilitating separation of ternary combined flooding from extracted fluid or extracted water - Google Patents
Method of facilitating separation of ternary combined flooding from extracted fluid or extracted water Download PDFInfo
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- CN101020815A CN101020815A CN 200710071946 CN200710071946A CN101020815A CN 101020815 A CN101020815 A CN 101020815A CN 200710071946 CN200710071946 CN 200710071946 CN 200710071946 A CN200710071946 A CN 200710071946A CN 101020815 A CN101020815 A CN 101020815A
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 126
- 239000007788 liquid Substances 0.000 claims description 79
- 238000000605 extraction Methods 0.000 claims description 25
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- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 12
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- 229940120146 EDTMP Drugs 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- YDONNITUKPKTIG-UHFFFAOYSA-N [Nitrilotris(methylene)]trisphosphonic acid Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CP(O)(O)=O YDONNITUKPKTIG-UHFFFAOYSA-N 0.000 claims description 6
- LOGBRYZYTBQBTB-UHFFFAOYSA-N butane-1,2,4-tricarboxylic acid Chemical compound OC(=O)CCC(C(O)=O)CC(O)=O LOGBRYZYTBQBTB-UHFFFAOYSA-N 0.000 claims description 6
- NFDRPXJGHKJRLJ-UHFFFAOYSA-N edtmp Chemical compound OP(O)(=O)CN(CP(O)(O)=O)CCN(CP(O)(O)=O)CP(O)(O)=O NFDRPXJGHKJRLJ-UHFFFAOYSA-N 0.000 claims description 6
- URDCARMUOSMFFI-UHFFFAOYSA-N 2-[2-[bis(carboxymethyl)amino]ethyl-(2-hydroxyethyl)amino]acetic acid Chemical compound OCCN(CC(O)=O)CCN(CC(O)=O)CC(O)=O URDCARMUOSMFFI-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
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- 229910021529 ammonia Inorganic materials 0.000 claims description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 235000020681 well water Nutrition 0.000 claims description 4
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- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
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- 235000015165 citric acid Nutrition 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 13
- 229910021645 metal ion Inorganic materials 0.000 abstract description 13
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract description 12
- 235000012239 silicon dioxide Nutrition 0.000 abstract description 7
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 3
- 150000005837 radical ions Chemical class 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 229910000323 aluminium silicate Inorganic materials 0.000 abstract 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 52
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- 244000018633 Prunus armeniaca Species 0.000 description 22
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 19
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 description 19
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 19
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- 238000004581 coalescence Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
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- 238000011084 recovery Methods 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 3
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- 150000001768 cations Chemical class 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
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- 230000002950 deficient Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
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- 239000010954 inorganic particle Substances 0.000 description 2
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- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
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- 239000000377 silicon dioxide Substances 0.000 description 2
- 229960001866 silicon dioxide Drugs 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 1
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 description 1
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
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- Fats And Perfumes (AREA)
Abstract
The present invention discloses method of facilitating separation of ternary combined flooding from extracted fluid or extracted water. The method features that complexing agent and alkaline agent are thrown into the ternary combined flooding extracted fluid to avoid the over saturation of bivalent metal ion, multivalent metal ion, silicic acid, silicic radical ion and metaaluminic radical ion in the water phase of the ternary combined flooding extracted fluid, and to suppress the generation of carbonate, sulfate, hydroxide, silicate, aluminosilicate and amorphous silica grain, so as to facilitate the separation of ternary combined flooding from extracted fluid or extracted water.
Description
Technical field:
The present invention relates to a kind of chemical treatment method that is used for ternary composite driving (alkali, surfactant and polymer drives) extraction liquid and recovered water in the oil recovery field, especially a kind ofly eliminate the method that inorganic particulate matter causes ternary combination flooding produced liquid and recovered water separation difficulty.
Background technology:
As a kind of practical technique that increases substantially oil recovery factor, the ternary composite driving technology has obtained developing rapidly in recent years, has carried out several mineral reserve tests at present both at home and abroad, and the recovery ratio increase rate can reach more than 18%, demonstrates good prospects for application.
When increasing substantially oil recovery factor, the ternary composite driving The Application of Technology is also given the new problem of having brought of separating of extraction liquid and recovered water.Ternary composite driving injects liquid owing to added a large amount of alkaline agent (as 1.2%NaOH), mineral such as rock in the oil reservoir and clay there is the intensive corrosion, the divalent-metal ion that is produced, polyvalent metal ion, silicate ion and meta-aluminic acid radical ion progress in the displacing fluid, add the ion-exchange effect that exists between the mineral such as displacing fluid and rock and clay, displacing fluid is saturated by divalent-metal ion, polyvalent metal ion, silicate ion and meta-aluminic acid radical ion institute gradually to the long-time transition process the extraction well from injecting well.Because oil reservoir water is to the mixing between the extraction liquid (the extraction liquid that especially pH is different) that originates from different oil wells in the diluting effect of displacing fluid and ground oil-gas gathering and transportation and the treating processes; in the ternary combination flooding produced liquid through regular meeting divalent-metal ion appears; polyvalent metal ion; silicic acid; the carbonate that silicate ion or the supersaturation of meta-aluminic acid radical ion cause; vitriol; silicate; silico-aluminate; the phenomenon that oxyhydroxide and amorphous silica particulate matter are separated out; formed solia particle not only makes extraction liquid aqueous phase suspended solids content increase; cause produced water disposal and re-injection difficulty; the part yardstick also can be adsorbed onto on the water-oil interface less than the colloidal particulate of 1 μ m; the formed sterically hindered coalescence difficulty between oil droplet and the water droplet that often causes causes ternary combination flooding produced liquid oily water separation difficulty.
The main means that solve at present ternary combination flooding produced liquid oily water separation problem are that to add with polyethers in extraction liquid treating processes be the emulsion splitter of main actives, the defective that exists mainly is that emulsion splitter can not make the colloidal state inorganic particles that is adsorbed on the water-oil interface all leave, be difficult to coalescence between the oil droplet under the situation that colloidal state inorganic particles content is big in extraction liquid and become big oil droplet, cause extraction liquid phase separation difficulty, isolated recovered water oleaginousness is too high.
The main means that solve the ternary composite flooding water extraction handling problem at present comprise chemical coagulation-flocculation, gravity settling, centrifugal settling, air supporting choosing, deep-bed filtration.Although chemical coagulation-flocculence can effectively be removed the suspended particulate in the ternary composite flooding water extraction, there is the problem that adds the dose height and produce the flocculation that has environmental hazard in a large number.Because it is a process that slowly continues that carbonate, vitriol, silicate, silico-aluminate, oxyhydroxide and amorphous silica precipitation are separated out, even if adopt physical methods such as gravity settling, centrifugal settling, air supporting choosing, deep-bed filtration the particulate matter in the ternary composite flooding water extraction effectively can be removed separately, still exist the particulate matter of newly separating out to cause and handle the problem that the suspended solids content bounce-back raises in the ternary composite flooding water extraction of back.
Summary of the invention:
The purpose of this invention is to provide a kind of method that inorganic particulate matter causes ternary combination flooding produced liquid and recovered water separation difficulty of eliminating.The principle of this method is to add complexing agent and alkaline agent in ternary combination flooding produced liquid, by preventing ternary combination flooding produced liquid aqueous phase divalent-metal ion, polyvalent metal ion, silicic acid, silicate ion and the supersaturation of meta-aluminic acid radical ion, suppress the generation of carbonate, vitriol, oxyhydroxide, silicate, silico-aluminate and amorphous silica particulate matter, eliminate the difficulty that above-mentioned inorganic particulate matter causes for ternary combination flooding produced liquid oily water separation and produced water disposal from the source.
Provided the water quality data of test site ternary composite flooding water extraction in May, the 2005 Daqing oil field apricot two in the following table 1.Provided in the table 2 according to the water quality data in the table 1 and adopted Downhole Sat
(tm)The instantaneous supersaturation amount of various inorganic salt in the recovered water of computed in software.
By in the following table 2 as seen, there is the oversaturated phenomenon of plurality of inorganic salt in the test site ternary composite flooding water extraction in May, the 2005 Daqing oil field apricot two, wherein supersaturation amount maximum be barium carbonate, lime carbonate and barium sulfate.
The water quality data table 1 of test site ternary composite flooding water extraction in May, 2005 apricot two
| Test event | Test data | Test event | Test data |
| pH | 9.40 | Apparent viscosity (40 ℃, 7.43s -1)，mPa·s | 1.10 |
| Polyacrylamide, mg/l | 125 | Alkyl benzene sulfonate surfactant, mg/l | 25 |
| Na +，mg/l | 2475 | Ca 2+，mg/l | 21.82 |
| K +，mg/l | 6.64 | Ba 2+，，mg/l | 33.52 |
| Mg 2+，mg/l | 3.86 | HCO 3 -，mg/l | 1879 |
| CO 3 2-，mg/l | 1320 | OH
-，mg/ |
0 |
| Cl -，mg/l | 1117 | SO 4 2-，mg/l | 24.2 |
| Fe，mg/l | 0.48 | Mn，mg/l | 0.26 |
| Sr 2+，mg/l | 2.06 | B，mg/l | 2.89 |
| S 2-，mg/l | 20.0 | Si，mg/l | 63.57 |
| Al，mg/l | 0.20 |
The instantaneous supersaturation amount (40 ℃) of various inorganic salts in the test site ternary composite flooding water extraction in May, 2005 apricot two: table 2
| Salt | Supersaturation amount under 40 ℃, mg/l |
| Barium carbonate (BaCO 3) | 47.74 |
| Lime carbonate (CaCO 3) | 12.47 |
| Strontium carbonate powder (SrCO 3) | 3.4 |
| Magnesiumcarbonate (MgCO 3) | 2.31 |
| Barium sulfate (BaSO 4) | 8.65 |
| Magnesium Silicate q-agent (Mg 2SiO 4) | 1.10 |
Provided in the accompanying drawing 2 with mean pore size be in the filtering apricot two of cellulose acetate film of 0.45 μ m the test site ternary composite flooding water extraction 40 ℃ of suspended particle size distribution test results after aging through 96h down.
By in the accompanying drawing 2 as seen, because carbonate, vitriol, silicate supersaturation in the test site ternary composite flooding water extraction in the apricot two, it can separate out the solid particulate of a large amount of particle diameters less than 4.3 μ m through long-time placement down at 40 ℃, and wherein size accounts for 71.36% of particle cumulative volume less than the colloidal particulate of 1 μ m.
Provided in May, 2005 isolated Fourier transform infrared spectroscopy test curve in the test site ternary combination flooding produced liquid from apricot two in the accompanying drawing 3 with the active suspended solid fine particles of water-oil interface.
By can determine in the accompanying drawing 3 in May, 2005 from apricot two in the test site ternary combination flooding produced liquid isolated main component with the active inorganic particulate matter of water-oil interface be amorphousness silicon-dioxide, silicate and carbonate.
Provided in May, 2005 Fourier transform infrared spectroscopy test curve of isolated suspended solids in the test site ternary composite flooding water extraction from apricot two in the accompanying drawing 4.
By can determine in the accompanying drawing 4 in May, 2005 from apricot two in the test site ternary composite flooding water extraction main inorganic composition of isolated inorganic particulate matter also be amorphousness silicon-dioxide, silicate and carbonate.
Provide test site ternary composite flooding water extraction and this water sample in May, 2005 apricot two in the following table 3 and filtered with the middling speed quantitative paper and remove test site dehydration gas-free oil in filtered water that suspended particle obtains and the apricot two to be emulsified into water ratio be 70% simulation extraction liquid, simulated the water remnants emulsification oil mass of extraction liquid behind 40 ℃ of following standing sedimentation 4h.
In the apricot two in the test site ternary composite flooding water extraction filterability suspended particle to the influence of simulation extraction liquid water oleaginousness after leaving standstill 4h under 40 ℃: table 3
| Water sample | The remaining emulsification oil mass of 4h water, mg/l |
| Former water | 14219 |
| Filtered water | 2692 |
By in the table 3 as seen, contain the suspended substance that to be held back and to have interfacial activity by filter paper in the apricot two in the test site ternary composite flooding water extraction, the oily water separation difficulty of removing the simulation ternary combination flooding produced liquid that ternary composite flooding water extraction and emulsification of crude oil behind these suspended substances form obviously reduces than the direct oily water separation difficulty with the simulation ternary combination flooding produced liquid of ternary composite flooding water extraction and emulsification of crude oil formation, wherein the remaining emulsification oil mass of the water of 4h is reduced to 2692mg/l by 14219mg/l, and the reduction amplitude is 81%.
Comprehensive above-mentioned data, ternary combination flooding produced liquid is adsorbed on the water-oil interface because of aqueous phase carbonate, vitriol, oxyhydroxide, silicate, silico-aluminate supersaturation cause producing solia particle, add the polyacrylamide in the extraction liquid and be adsorbed on interaction between the solia particle on the water-oil interface, having formed and hindered between the oil droplet the sterically hindered of coalescence mutually, is a major reason that causes ternary combination flooding produced liquid oily water separation difficulty.
Technical scheme of the present invention is: this elimination inorganic particulate matter causes the method for ternary combination flooding produced liquid or recovered water separation difficulty, be to add complexing agent and alkaline agent to ternary combination flooding produced liquid or ternary combination flooding produced liquid in the extraction liquid with mixing of water drive and/or polymkeric substance flooding produced liquid, the dosage of every liter of extraction liquid aqueous phase complexing agent and alkaline agent is respectively 100mg～2000mg.
The embodiment of aforesaid method is for to add complexing agent and alkaline agent at oil well oil sets annular space, oil well water mixing pipeline or oil-gas separator/triphase separator liquid-inlet pipe line position place.Water pH＞8.5, surfactant content＞10mg/l, the polymer content＞20mg/l that mix extraction liquid of ternary combination flooding produced liquid or ternary combination flooding produced liquid and water drive and/or polymkeric substance flooding produced liquid.Complexing agent is one or more the compound in the following medicament: ethylenediamine tetraacetic acid (EDTA) or its salt, N one hydroxyethylethylene diamine tri-acetic acid or its salt, 2-phosphonic acids butane-1,2,4 tricarboxylic acid or its salt, Amino Trimethylene Phosphonic Acid or its salt, hydroxy ethylene diphosphonic acid or its salt, diethylene triamine pentamethylene phosphonic or its salt, ethylene diamine tetra methylene phosphonic acid or its salt, diethylene triamine pentacetic acid (DTPA) or its salt, 2-hydroxy propane-1,2,3-tricarboxylic acid or its salt, nitrilotriacetic acid(NTA) or its salt.Alkaline agent is one or more a compound of following medicament: ammonia, sodium hydroxide, yellow soda ash, sodium bicarbonate, potassium hydroxide, salt of wormwood, saleratus.
The present invention has following beneficial effect: the invention discloses and a kind ofly suppress ternary combination flooding produced liquid and cause suspended solids content in the recovered water to increase and the method for extraction liquid oily water separation difficulty because of its water divalent-metal ion, polyvalent metal ion, silicic acid, silicate ion and the supersaturation of meta-aluminic acid radical ion produce colloidal particle by add complexing agent and alkaline agent in ternary combination flooding produced liquid.Adopt this method can effectively prevent separating out of ternary combination flooding produced liquid aqueous phase carbonate, vitriol, oxyhydroxide, silicate, silico-aluminate and amorphous silica particulate, significantly improve the oily water separation characteristic of ternary combination flooding produced liquid, reduce the intractability of ternary composite flooding water extraction.The complexing agent that wherein adds can form stable water soluble complex with the divalence and the multivalent metal cation of ternary combination flooding produced liquid aqueous phase, make the divalence and the polyvalent metal ion of aqueous phase be in undersaturated condition, prevent the formation of carbonate, vitriol, silicate and hydroxide particulate, and the effect that adds alkaline agent is the pH value that improves the ternary combination flooding produced liquid water, increase the dissociation degree of silicic acid and meta-aluminic acid, improve its solubleness in water, thereby prevent the formation of silico-aluminate and amorphous silica particulate matter.So not only can effectively suppress separating out of carbonate, vitriol, silicate, silico-aluminate, oxyhydroxide and amorphous silica particulate matter, also original part carbonate, vitriol, silicate, silico-aluminate, oxyhydroxide and amorphous silica particle dissolution in the extraction liquid can be prevented that these particulates are adsorbed on the coalescence that stops on the water-oil interface between oil droplet and the water droplet.
For the complexing agent that overcomes single kind causes required dose and the too high defective of processing costs of adding to the divalence of some kind of ternary combination flooding produced liquid aqueous phase and the complex ability difference of multivalent metal cation, use can be combined with each other two or more complexing agent.From the action effect of complexing agent, the compound proportion of various complexing agents can be can both reach effect of the present invention arbitrarily, because all be complexing agent, they are the same to effect of the present invention and contribution.
Alkaline agent effect in the present invention is the pH value that improves the ternary combination flooding produced liquid water, so ammonia, sodium hydroxide, yellow soda ash, sodium bicarbonate, potassium hydroxide, salt of wormwood, saleratus all can be used for preventing to separate out in the ternary combination flooding produced liquid silico-aluminate and amorphous silica particulate matter, in use can be that single a kind of alkali also can be that two or more alkaline agent is composite, the composite ratio of various alkaline agents can be arbitrarily, as long as the enough height of pH of extraction liquid water can both reach effect of the present invention, because they are the same to effect of the present invention and contribution.
Description of drawings:
Fig. 1 be complexing agent and alkaline agent add snack made with traditional Chinese medicines setting, the production tree of 1-well mouth of oil well among the figure, the chemicals dosing plant of 2-complexing agent and alkaline agent, 3-water mixing process furnace, 4-oil-gas separator or three phases separator, 5-free water knockout (FWKO) (jar), 6-water trap (jar);
Fig. 2 is the size distribution of suspended solids in the ternary composite flooding water extraction;
Fig. 3 is the Fourier transform infrared spectroscopy test curve that has the active suspended solid fine particles of water-oil interface in the apricot two in the test site ternary combination flooding produced liquid;
Fig. 4 is the Fourier transform infrared spectroscopy test curve of suspended solids in the test site ternary composite flooding water extraction in the apricot two.
Embodiment:
The invention will be further described below in conjunction with embodiment:
3 positions that are adapted at adding in the ternary combination flooding produced liquid complexing agent and alkaline agent have been provided in the accompanying drawing 1, the dosing position that is from upstream to the downstream by the flow direction of oil well produced liquid is followed successively by: 1, oil well oil sets annular space: to add advantage that snack made with traditional Chinese medicines adds complexing agent and alkaline agent be medicament just joined in the fluid that flow into from the stratum in the pit shaft before profit machinery emulsification and the mutual blending of different oil well produced liquids from this, can make the effect of complexing agent and alkaline agent obtain the performance of fullest; 2, oil well water mixing pipeline: adding the advantage that snack made with traditional Chinese medicines adds complexing agent and alkaline agent from this is that medicament just joins the individual well extraction liquid before the mutual blending of different oil well produced liquids, be convenient to the performance of complexing agent and alkaline agent effect, and medicament adds a little less convenient operation and management; 3, oil-gas separator/triphase separator feed liquor pipeline: adding advantage that snack made with traditional Chinese medicines adds complexing agent and alkaline agent from this, to be that medicament adds a little few, convenient operation and management.
Complexing agent in the accompanying drawing 1 can divide different grug feeding jar and the dosing pumps of employing that come to add with alkaline agent, also can be pre-mixed into mixed solution and add together.Under complexing agent and alkaline agent branch come situation about adding, the dispensing point of alkaline agent should be arranged on complexing agent and add the downstream of snack made with traditional Chinese medicines to prevent before adding complexing agent, separating out carbonate and hydroxide particles.
Above-mentioned 3 add snack made with traditional Chinese medicines and should cause the degree of extraction liquid oily water separation difficulty, the scale of surface gathering system and concrete surface gathering and transferring processing parameter to select according to inorganic particulate matter.Single from action effect, should select to add snack made with traditional Chinese medicines by the priority of oil well oil sets annular space, oil well water mixing pipeline, oil-gas separator/triphase separator feed liquor pipeline.
See Table 4 by the suspended solids content in the ternary composite flooding water extraction of above-mentioned steps test.The suspended solids content test data as seen in the ternary composite flooding water extraction in the contrast table 4, in ternary composite flooding water extraction, add the 500mg/l disodium EDTA and can make it be reduced to 12mg/l by 26mg/l, in recovered water, add the 500mg/l disodium EDTA and then can make through the suspended solids content in the recovered water of identical time settlement with different alkaline agents in 100mg/l～2000mg/l table 4 and be reduced to 12mg/l～15mg/l through the suspended solids content behind 6h 40 ℃ of standing sedimentations.
Table 4
| Disodium EDTA dosage mg/l | Alkaline agent | Alkaline agent dosage mg/l | Initial suspended solids content mg/l | 6h suspended solids content mg/ |
| 0 | 0 | 48 | 26 | |
| 500 | 0 | 12 | ||
| 500 | NaOH | 500 | 14 | |
| 500 | |
100 | 12 | |
| 500 | Na 2CO 3 | 1000 | 13 | |
| 500 | NaHCO 3 | 2000 | 12 | |
| 500 | |
500 | 13 | |
| 500 | K 2CO 3 | 1000 | 13 | |
| 500 | KHCO 3 | 2000 | 15 |
See Table 5 by remaining emulsification oil mass of the water of above-mentioned steps test and oil phase water ratio data.
Table 5
| Disodium EDTA dosage mg/l | Alkaline agent | Alkaline agent dosage mg/l | The remaining emulsification oil mass of 1h water mg/l | 1h oil phase water ratio % |
| 0 | —— | 0 | 75254 | 3.5 |
| 500 | —— | 0 | 43261 | 2.2 |
| 500 | NaOH | 500 | 29611 | 7.1 |
| 500 | |
100 | 30577 | 2.8 |
| 500 | Na 2CO 3 | 1000 | 28214 | 6.7 |
| 500 | NaHCO 3 | 2000 | 25378 | 7.3 |
| 500 | |
500 | 29869 | 6.5 |
| 500 | K 2CO 3 | 1000 | 27631 | 6.9 |
| 500 | KHCO 3 | 2000 | 26162 | 5.9 |
The remaining emulsification oil mass of water in the contrast table 5 as seen, in ternary composite flooding water extraction, add the 500mg/l disodium EDTA and can make the simulation ternary combination flooding produced liquid be reduced to 43261mg/l by 75254mg/l, in recovered water, add the 500mg/l disodium EDTA and then can make the remaining emulsification oil mass of water of identical time be reduced to 25378mg/l～30577mg/l with alkaline agent in 100mg/l～2000mg/l table 5 through the remaining emulsification oil mass of the water behind 1h40 ℃ of standing sedimentation.By the contrast of the 1h oil phase water cut test data in the table 2 as seen, in ternary composite flooding water extraction, add the 500mg/l disodium EDTA and can make extraction liquid be reduced to 2.2% by 3.5%, in recovered water, add the 500mg/l disodium EDTA and then make the oil phase water ratio of identical time rise to 2.8%～7.2% by 2.2% with alkaline agent in 100mg/l～2000mg/l table 5 through the oil phase water ratio behind 1h 40 ℃ of standing sedimentations.The above analysis, adding 500mg/l complexing agent disodium EDTA in ternary combination flooding produced liquid can make its oily water separation characteristic be significantly improved, the alkaline agent that adds in ternary combination flooding produced liquid in 500mg/l complexing agent disodium EDTA and the 100mg/l～2000mg/l table 5 has then reduced the water oleaginousness on the one hand, and the oil phase water ratio is risen.
See Table 6 by the suspended solids content in the ternary composite flooding water extraction of above-mentioned steps test.
Complexing agent and alkaline agent are to the stabilization of ternary composite flooding water extraction
Table 6
| Sequence number | Complexing agent | Add dose mg/l | Alkaline agent | Alkaline agent adds dose, mg/l | The 72h suspended solids content, mg/ |
| 1 | —— | 0 | —— | 0 | 75 |
| 2 | Disodium EDTA | 500 | —— | 0 | 13 |
| 3 | N one hydroxyethylethylene diamine tri-acetic |
500 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 15 |
| 4 | 2-phosphonic acids butane-1,2,4 |
1000 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 12 |
| 5 | Amino Trimethylene Phosphonic Acid | 300 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 17 |
| 6 | Hydroxy ethylene diphosphonic acid | 200 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 19 |
| 7 | The diethylene triamine pentamethylene phosphonic five sodium- |
2000 | ——— | 0 | 10 |
| 8 | Ethylene diamine tetra methylene |
1000 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 12 |
| 9 | Diethylene triamine pentacetic acid (DTPA) | 1500 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 11 |
| 10 | 2-hydroxy propane-1,2, the 3- |
1500 | 50％NaOH+ 50％Na 2CO 3 | 1000 | 12 |
| 11 | Nitrilotriacetic acid(NTA) | 100 | 50％ |
1000 | 25 |
| 50％Na 2CO 3 | |||||
| 12 | 80% nitrilotriacetic acid(NTA)+20% disodium EDTA | 500 | NaOH | 500 | 10 |
| 13 | 80% nitrilotriacetic acid(NTA)+20%N one hydroxyethylethylene diamine tri-acetic |
500 | NaOH | 500 | 12 |
| 14 | 80% nitrilotriacetic acid(NTA)+20%2-phosphonic acids butane-1,2,4 |
500 | NaOH | 500 | 15 |
| 15 | 80% nitrilotriacetic acid(NTA)+20% Amino Trimethylene Phosphonic Acid | 500 | NaOH | 500 | 15 |
| 16 | 80% nitrilotriacetic acid(NTA)+20% hydroxy ethylene |
500 | NaOH | 500 | 13 |
| 17 | 80% nitrilotriacetic acid(NTA)+20% diethylene triamine pentamethylene phosphonic five sodium- |
500 | NaOH | 500 | 12 |
| 18 | 80% nitrilotriacetic acid(NTA)+20% ethylene diamine tetra methylene |
500 | NaOH | 500 | 14 |
| 19 | 80% nitrilotriacetic acid(NTA)+20% diethylene triamine pentacetic acid (DTPA) | 500 | |
500 | 10 |
| 20 | 80% nitrilotriacetic acid(NTA)+20%2-hydroxy propane-1,2, the 3- |
500 | NaOH | 500 | 13 |
| 21 | Nitrilotriacetic acid(NTA) | 500 | NaOH | 500 | 11 |
By the suspended solids content test data of the aging membrane filtration water in the table 6 as seen, after the ternary composite flooding water extraction after the membrane filtration under the situation that does not add complexing agent is aging through 40 ℃ of 72h once more the suspended solids content measured of membrane filtration up to 75mg/l; And under the situation of the alkaline agent in the complexing agent in adding 100mg/l～2000mg/l table 6 and the 500mg/l～1000mg/l table 6, the suspended solids content after the ternary composite flooding water extraction after the membrane filtration wears out through 40 ℃ of 72h is all below 25mg/l.Above-mentioned phenomenon shows, adds complexing agent and alkaline agent and can effectively suppress wherein separating out of inorganic solid particles thing in ternary composite flooding water extraction.
See Table 7 by remaining emulsification oil mass of the water of above-mentioned steps test and oil phase water ratio data.
Table 7
| Sequence number | Complexing agent | Complexing agent adds dose mg/l | Alkaline agent | Alkaline agent adds dose mg/l | The remaining emulsification oil mass of 1h water mg/l | 1h oil phase water ratio % |
| 1 | —— | 0 | —— | 0 | 145100 | 7.7 |
| 2 | Disodium EDTA | 500 | —— | 0 | 1623 | 5.0 |
| 3 | N one hydroxyethylethylene |
500 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 1752 | 9.5 |
| 4 | 2-phosphonic acids butane-1,2,4 |
1000 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 1450 | 8.1 |
| 5 | Amino Trimethylene Phosphonic Acid | 300 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 1975 | 9.4 |
| 6 | Hydroxy ethylene diphosphonic acid | 200 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 1863 | 8.3 |
| 7 | The diethylene triamine pentamethylene phosphonic five sodium- |
2000 | —— | 0 | 916 | 3.8 |
| 8 | Ethylene diamine tetra methylene |
1000 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 812 | 9.0 |
| 9 | Diethylene triamine pentacetic acid (DTPA) | 1500 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 1429 | 10.0 |
| 10 | 2-hydroxy propane-1,2, the 3- |
1500 | 50％ NaOH+ 50％Na 2CO 3 | 1000 | 835 | 9.7 |
| 11 | Nitrilotriacetic acid(NTA) | 100 | 50％ NaOH+ 50％Na
2 |
1000 | 2285 | 11.6 |
| 12 | 80% nitrilotriacetic acid(NTA)+20% disodium EDTA | 500 | NaOH | 500 | 1129 | 8.3 |
| 13 | 80% nitrilotriacetic acid(NTA)+20% N, one hydroxyethylethylene diamine, three |
500 | NaOH | 500 | 1240 | 9.3 |
| Acid | ||||||
| 14 | 80% nitrilotriacetic acid(NTA)+20% 2-phosphonic acids butane-1,2,4 |
500 | NaOH | 500 | 1652 | 10.3 |
| 15 | 80% nitrilotriacetic acid(NTA)+20% Amino Trimethylene |
500 | NaOH | 500 | 948 | 9.2 |
| 16 | 80% nitrilotriacetic acid(NTA)+20% hydroxy ethylene |
500 | NaOH | 500 | 1026 | 8.6 |
| 17 | 80% nitrilotriacetic acid(NTA)+20% diethylene triamine pentamethylene phosphonic five sodium- |
500 | NaOH | 500 | 1151 | 10.5 |
| 18 | 80% nitrilotriacetic acid(NTA)+20% ethylene diamine tetra methylene |
500 | NaOH | 500 | 1301 | 8.7 |
| 19 | 80% nitrilotriacetic acid(NTA)+20% diethylene triamine pentacetic acid (DTPA) | 500 | NaOH | 500 | 1059 | 93 |
| 20 | 80% nitrilotriacetic acid(NTA)+20%2-hydroxy propane-1,2, the 3- |
500 | NaOH | 500 | 1240 | 10.8 |
| 21 | Nitrilotriacetic acid(NTA) | 500 | NaOH | 500 | 929 | 8.9 |
As seen the remaining emulsification oil mass of water in the contrast table 7 adds complexing agent in 100mg/l～2000mg/l table 7 and the alkaline agent in 500mg/l～1000mg/l table 7 it is reduced to below the 2285mg/l by 145100mg/l through the simulation ternary combination flooding produced liquid of 40 ℃ of aging backs of 72h and the dehydration gas-free oil emulsification preparation remaining emulsification oil mass of water after through 40 ℃ of standing sedimentations of 1h in the ternary composite flooding water extraction after membrane filtration.71h； The oil phase moisture content that adds in ternary composite flooding water extraction after 500mg/l disodium EDTA or 1000mg/l diethylene triamine pentamethylene phosphonic five sodium-salt can make 40 ℃ of aging rear simulated produced fluids that prepare with the emulsification of dehydration degassed crude of its process 72h through 40 ℃ of standing sedimentations of 1h is reduced to below 6.5% by 7.7%, and the complexing agent and the alkaline agent in 500mg/l～1000mg/l table 7 that add in recovered water in 100mg/l～2000mg/l table 7 then make the oil phase moisture content of same time rise to 8.1%～11.6% by 7.7%.
Claims (5)
1, a kind ofly eliminates the method that inorganic particulate matter causes ternary combination flooding produced liquid or recovered water separation difficulty, it is characterized in that: add complexing agent and alkaline agent to ternary combination flooding produced liquid or ternary combination flooding produced liquid in the extraction liquid with mixing of water drive and/or polymkeric substance flooding produced liquid, the dosage of every liter of extraction liquid aqueous phase complexing agent and alkaline agent is respectively 100mg～2000mg.
2. elimination inorganic particulate matter according to claim 1 causes the method for ternary combination flooding produced liquid and recovered water separation difficulty, it is characterized in that: add complexing agent and alkaline agent at oil well oil sets annular space, oil well water mixing pipeline or oil-gas separator/triphase separator liquid-inlet pipe line position place.
3, elimination inorganic particulate matter according to claim 1 causes the method for ternary combination flooding produced liquid or recovered water separation difficulty, it is characterized in that: water pH＞8.5, surfactant content＞10mg/l, the polymer content＞20mg/l that mix extraction liquid of ternary combination flooding produced liquid or ternary combination flooding produced liquid and water drive and/or polymkeric substance flooding produced liquid.
4, elimination inorganic particulate matter according to claim 1 causes the method for ternary combination flooding produced liquid and recovered water separation difficulty, it is characterized in that: complexing agent is one or more the compound in the following medicament: ethylenediamine tetraacetic acid (EDTA) or its salt, N one hydroxyethylethylene diamine tri-acetic acid or its salt, 2-phosphonic acids butane-1,2,4 tricarboxylic acid or its salt, Amino Trimethylene Phosphonic Acid or its salt, hydroxy ethylene diphosphonic acid or its salt, diethylene triamine pentamethylene phosphonic or its salt, ethylene diamine tetra methylene phosphonic acid or its salt, diethylene triamine pentacetic acid (DTPA) or its salt, 2-hydroxy propane-1,2,3-tricarboxylic acid or its salt, nitrilotriacetic acid(NTA) or its salt.
5, elimination inorganic particulate matter according to claim 1 causes the method for ternary combination flooding produced liquid and recovered water separation difficulty, it is characterized in that: alkaline agent is one or more a compound of following medicament: ammonia, sodium hydroxide, yellow soda ash, sodium bicarbonate, potassium hydroxide, salt of wormwood, saleratus.
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