AU2013262703B2 - Pipeline reaction for removing heavy metals from produced fluids - Google Patents
Pipeline reaction for removing heavy metals from produced fluids Download PDFInfo
- Publication number
- AU2013262703B2 AU2013262703B2 AU2013262703A AU2013262703A AU2013262703B2 AU 2013262703 B2 AU2013262703 B2 AU 2013262703B2 AU 2013262703 A AU2013262703 A AU 2013262703A AU 2013262703 A AU2013262703 A AU 2013262703A AU 2013262703 B2 AU2013262703 B2 AU 2013262703B2
- Authority
- AU
- Australia
- Prior art keywords
- pipeline
- fluid
- fixing agent
- produced
- heavy metals
- 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.)
- Ceased
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 140
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 71
- 238000006243 chemical reaction Methods 0.000 title description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000010790 dilution Methods 0.000 claims abstract description 47
- 239000012895 dilution Substances 0.000 claims abstract description 47
- 238000000034 method Methods 0.000 claims abstract description 36
- 239000010779 crude oil Substances 0.000 claims abstract description 22
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 58
- 229910052753 mercury Inorganic materials 0.000 claims description 53
- 238000004519 manufacturing process Methods 0.000 claims description 44
- 229930195733 hydrocarbon Natural products 0.000 claims description 28
- 150000002430 hydrocarbons Chemical class 0.000 claims description 28
- 239000003921 oil Substances 0.000 claims description 25
- 239000004215 Carbon black (E152) Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 22
- 229910052785 arsenic Inorganic materials 0.000 claims description 20
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 18
- -1 dithio organic acid Chemical class 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 150000003464 sulfur compounds Chemical group 0.000 claims description 10
- 239000005077 polysulfide Substances 0.000 claims description 9
- 229920001021 polysulfide Polymers 0.000 claims description 9
- 150000008117 polysulfides Polymers 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 229910052977 alkali metal sulfide Inorganic materials 0.000 claims description 2
- 239000002283 diesel fuel Substances 0.000 claims description 2
- 239000012990 dithiocarbamate Substances 0.000 claims description 2
- 239000003502 gasoline Substances 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 229930192474 thiophene Natural products 0.000 claims description 2
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 claims 6
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 claims 3
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 claims 2
- 239000012988 Dithioester Substances 0.000 claims 2
- 125000005022 dithioester group Chemical group 0.000 claims 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims 2
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 claims 1
- 150000007524 organic acids Chemical class 0.000 claims 1
- 239000002351 wastewater Substances 0.000 abstract description 7
- 239000002244 precipitate Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 235000019198 oils Nutrition 0.000 description 18
- 239000007789 gas Substances 0.000 description 17
- 239000012071 phase Substances 0.000 description 11
- 239000008139 complexing agent Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- QXKXDIKCIPXUPL-UHFFFAOYSA-N sulfanylidenemercury Chemical compound [Hg]=S QXKXDIKCIPXUPL-UHFFFAOYSA-N 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000003079 shale oil Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 4
- 239000004614 Process Aid Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000005708 Sodium hypochlorite Substances 0.000 description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003085 diluting agent Substances 0.000 description 3
- 150000004820 halides Chemical class 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- 239000003027 oil sand Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 229910052956 cinnabar Inorganic materials 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical class O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002731 mercury compounds Chemical class 0.000 description 2
- BQPIGGFYSBELGY-UHFFFAOYSA-N mercury(2+) Chemical compound [Hg+2] BQPIGGFYSBELGY-UHFFFAOYSA-N 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052569 sulfide mineral Inorganic materials 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- XPDICGYEJXYUDW-UHFFFAOYSA-N tetraarsenic tetrasulfide Chemical compound S1[As]2S[As]3[As]1S[As]2S3 XPDICGYEJXYUDW-UHFFFAOYSA-N 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- HTDIUWINAKAPER-UHFFFAOYSA-N trimethylarsine Chemical compound C[As](C)C HTDIUWINAKAPER-UHFFFAOYSA-N 0.000 description 2
- DOBUSJIVSSJEDA-UHFFFAOYSA-L 1,3-dioxa-2$l^{6}-thia-4-mercuracyclobutane 2,2-dioxide Chemical compound [Hg+2].[O-]S([O-])(=O)=O DOBUSJIVSSJEDA-UHFFFAOYSA-L 0.000 description 1
- XZXYQEHISUMZAT-UHFFFAOYSA-N 2-[(2-hydroxy-5-methylphenyl)methyl]-4-methylphenol Chemical compound CC1=CC=C(O)C(CC=2C(=CC=C(C)C=2)O)=C1 XZXYQEHISUMZAT-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910017000 As2Se3 Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000004155 Chlorine dioxide Chemical class 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000012028 Fenton's reagent Substances 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910002567 K2S2O8 Inorganic materials 0.000 description 1
- 229910019093 NaOCl Inorganic materials 0.000 description 1
- 239000012425 OXONE® Substances 0.000 description 1
- 108700020962 Peroxidase Proteins 0.000 description 1
- 102000003992 Peroxidases Human genes 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- YWIULWOWYIZJBX-UHFFFAOYSA-N [Cl].O1C=COC=C1 Chemical compound [Cl].O1C=COC=C1 YWIULWOWYIZJBX-UHFFFAOYSA-N 0.000 description 1
- IHWQVEJFTCBEKM-UHFFFAOYSA-M [Hg]O.[Hg]=[Se] Chemical class [Hg]O.[Hg]=[Se] IHWQVEJFTCBEKM-UHFFFAOYSA-M 0.000 description 1
- ZGSDJMADBJCNPN-UHFFFAOYSA-N [S-][NH3+] Chemical class [S-][NH3+] ZGSDJMADBJCNPN-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229940107816 ammonium iodide Drugs 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 description 1
- 229910052964 arsenopyrite Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- VTIIJXUACCWYHX-UHFFFAOYSA-L disodium;carboxylatooxy carbonate Chemical compound [Na+].[Na+].[O-]C(=O)OOC([O-])=O VTIIJXUACCWYHX-UHFFFAOYSA-L 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 150000004659 dithiocarbamates Chemical class 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002429 hydrazines Chemical class 0.000 description 1
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- JGJLWPGRMCADHB-UHFFFAOYSA-N hypobromite Inorganic materials Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Inorganic materials Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 229910052945 inorganic sulfide Inorganic materials 0.000 description 1
- ICIWUVCWSCSTAQ-UHFFFAOYSA-M iodate Chemical compound [O-]I(=O)=O ICIWUVCWSCSTAQ-UHFFFAOYSA-M 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229940074994 mercuric sulfate Drugs 0.000 description 1
- MINVSWONZWKMDC-UHFFFAOYSA-L mercuriooxysulfonyloxymercury Chemical compound [Hg+].[Hg+].[O-]S([O-])(=O)=O MINVSWONZWKMDC-UHFFFAOYSA-L 0.000 description 1
- 229910000371 mercury(I) sulfate Inorganic materials 0.000 description 1
- 229910000372 mercury(II) sulfate Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001511 metal iodide Inorganic materials 0.000 description 1
- ZTEHTGMWGUKFNE-UHFFFAOYSA-N methyl 3-[[2-(diaminomethylideneamino)-1,3-thiazol-4-yl]methylsulfanyl]propanimidate Chemical compound COC(=N)CCSCC1=CSC(N=C(N)N)=N1 ZTEHTGMWGUKFNE-UHFFFAOYSA-N 0.000 description 1
- NALMPLUMOWIVJC-UHFFFAOYSA-N n,n,4-trimethylbenzeneamine oxide Chemical compound CC1=CC=C([N+](C)(C)[O-])C=C1 NALMPLUMOWIVJC-UHFFFAOYSA-N 0.000 description 1
- 239000003498 natural gas condensate Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 235000019476 oil-water mixture Nutrition 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 150000008116 organic polysulfides Chemical group 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- JLKDVMWYMMLWTI-UHFFFAOYSA-M potassium iodate Chemical compound [K+].[O-]I(=O)=O JLKDVMWYMMLWTI-UHFFFAOYSA-M 0.000 description 1
- 239000001230 potassium iodate Substances 0.000 description 1
- 235000006666 potassium iodate Nutrition 0.000 description 1
- 229940093930 potassium iodate Drugs 0.000 description 1
- OKBMCNHOEMXPTM-UHFFFAOYSA-M potassium peroxymonosulfate Chemical compound [K+].OOS([O-])(=O)=O OKBMCNHOEMXPTM-UHFFFAOYSA-M 0.000 description 1
- 235000019394 potassium persulphate Nutrition 0.000 description 1
- 239000007843 reactive sulfur species Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 description 1
- 239000011697 sodium iodate Substances 0.000 description 1
- 235000015281 sodium iodate Nutrition 0.000 description 1
- 229940032753 sodium iodate Drugs 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 235000010262 sodium metabisulphite Nutrition 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 1
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical class [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- MWNQXXOSWHCCOZ-UHFFFAOYSA-L sodium;oxido carbonate Chemical compound [Na+].[O-]OC([O-])=O MWNQXXOSWHCCOZ-UHFFFAOYSA-L 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 150000003577 thiophenes Chemical class 0.000 description 1
- 150000004764 thiosulfuric acid derivatives Chemical class 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- BPLUKJNHPBNVQL-UHFFFAOYSA-N triphenylarsine Chemical compound C1=CC=CC=C1[As](C=1C=CC=CC=1)C1=CC=CC=C1 BPLUKJNHPBNVQL-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 1
- JBIQAPKSNFTACH-UHFFFAOYSA-K vanadium oxytrichloride Chemical compound Cl[V](Cl)(Cl)=O JBIQAPKSNFTACH-UHFFFAOYSA-K 0.000 description 1
- 239000002569 water oil cream Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G53/00—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes
- C10G53/02—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only
- C10G53/04—Treatment of hydrocarbon oils, in the absence of hydrogen, by two or more refining processes plural serial stages only including at least one extraction step
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G21/00—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents
- C10G21/06—Refining of hydrocarbon oils, in the absence of hydrogen, by extraction with selective solvents characterised by the solvent used
- C10G21/08—Inorganic compounds only
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G19/00—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G27/00—Refining of hydrocarbon oils in the absence of hydrogen, by oxidation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G31/00—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for
- C10G31/08—Refining of hydrocarbon oils, in the absence of hydrogen, by methods not otherwise provided for by treating with water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/205—Metal content
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/36—Underwater separating arrangements
Abstract
A method for simultaneously transporting and removing trace amount levels of heavy metals from produced fluids such as crude oil, with the injection of a fixing agent into the pipeline for use in transporting the produced fluid. A sufficient amount of the fixing agent is injected into the pipeline containing the produced fluid and a dilution fluid. The fixing agent reacts with the heavy metals forming precipitate or soluble complexes in the dilution. The dilution fluid containing the heavy metal complexes is separated from the produced fluid, generating a treated produced fluid having a reduced concentration of heavy metals. In one embodiment, the dilution fluid is water, and the wastewater containing the heavy metal complexes after recovery can be recycled by injection into a reservoir.
Description
The invention relates generally to a process, method, and system for removing heavy metals including mercury from hydrocarbon fluids such as crude oil and gases.
BACKGROUND [003] Pipelines are widely used in a variety of industries, allowing a large amount of material to be transported from one place to another. The transport can be for a short distance as within a plant or over a long distance such as a continent. A variety of fluids, such as oil and/or gas, as well as particulate, and other small solids suspended in fluids, are transported cheaply and efficiently using pipelines. Pipelines can be subterranean, submarine, on the surface of the earth, and even suspended above the earth. Submarine pipelines especially carry enormous quantities of oil and gas products indispensable to energy-related industries, often under tremendous pressure and at low temperatures and at high flow rates.
[004] Oil and gas pipelines, including undersea or submarine pipelines, typically carry production fluids from one of the production wells including subsea wells. These fluids may be, but are not limited to, a gas, a liquid, an emulsion, a slurry and / or a stream comprising solid particles (oil sand). The production fluid can be a single phase, a two phase or even a three phase admixture.
[005] Methods have been disclosed to remove heavy metals from produced fluids. Common approaches utilize treatments for the fluids once the fluids are recovered from subterranean reservoirs and brought to a surface production installation. US Patent No. 4,551,237 discloses the use of an aqueous solution of sulfide materials to remove arsenic from oil shale. US Patent No. 4,877,515 discloses a process for removing mercury from hydrocarbon streams, gas or liquid. US Patent No. 4,915,818 discloses a method of removing mercury from liquid hydrocarbons (natural gas condensate) by contact with a dilute aqueous
1002067072
2013262703 29 Jan 2018 solution of alkali metal sulfide salt. US Patent No. 6,268,543 discloses a method for removing elemental mercury with a sulfur compound. US Patent No. 6,350,372 discloses removing mercury from a hydrocarbon feed by contact with an oil soluble or oil miscible sulfur compound. U.S. Pat. No. 4,474,896 discloses using polysulfide based absorbents to remove elemental mercury (Hg°) from gaseous and liquid hydrocarbon streams.
[0006] Given the cost of expensive installations of equipment in production facilities for the removal of heavy metals from produced fluids, there is a need for the efficient removal of trace levels of heavy metals from hydrocarbon fluids from production wells, before reaching refineries, shipping terminals, or upstream oil processing facilities that separate and prepare crude oil for sale including land-based oil processing facilities, and offshore oil processing platforms including floating production, storage and offloading (FPSO) units and others performing similar functions.
[0006A] Reference to any prior art in the specification is not an acknowledgment or suggestion that this prior art forms part of the common general knowledge in any jurisdiction or that this prior art could reasonably be expected to be understood, regarded as relevant, and/or combined with other pieces of prior art by a skilled person in the art.
[0006B] As used herein, except where the context requires otherwise, the term comprise and variations of the term, such as comprising, comprises and comprised, are not intended to exclude other additives, components, integers or steps.
SUMMARY OF THE INVENTION [0007] In one aspect of the invention there is provided a method for simultaneously transporting and removing a trace amount of heavy metals from a produced fluid, comprising: transporting a mixture of produced fluid and dilution fluid in a pipeline from a production well to a processing facility; injecting into the pipeline carrying the produced fluid an effective amount of a fixing agent to form a mixture for at least a portion of the heavy metals to react with the fixing agent forming heavy metal complexes that are insoluble in the produced fluid and the dilution fluid while the mixture is being transported in the pipeline before the produced fluid reaches the processing facility; and separating the insoluble heavy metal complexes from the dilution fluid and produced fluid for a treated hydrocarbon stream having a reduced concentration of heavy metals; wherein the fixing agent is injected into the pipeline at an entry point to a well head of the production well or close to the well head; wherein the pipeline is at least 0.5 km; and wherein the mixture is being transported in the pipeline has superficial liquid velocity of at least 0.1 m/s.
1002067072
2013262703 29 Jan 2018 [0007A] Also disclosed herein is a method for simultaneously transporting and removing a trace amount of heavy metals from a produced fluid. The method comprises: extracting a produced fluid containing heavy metals from a production well; injecting into the produced fluid an effective amount of at least fixing agent and a dilution fluid forming a mixture; transferring the mixture through a pipeline from the production well for a sufficient distance for at least a portion of the heavy metals to react with the mixture, at least a fixing agent, and be extracted into the dilution fluid as complexes; and separating the dilution fluid containing the heavy metal complexes from the produced fluid for a treated produced fluid having a reduced concentration of heavy metals.
[0008] Also disclosed herein is a method for simultaneously transporting and removing mercury from a crude. The method comprises: extracting the crude containing a trace amount of mercury from a production well; injecting into the crude an effective amount of at least fixing agent and a sufficient amount of water forming a mixture; transferring the mixture through a pipeline for a sufficient distance for at least a portion of mercury to react with the fixing agent forming a soluble mercury complex in water; separating the water containing the soluble mercury complex from the crude for a treated crude having reduced mercury concentration.
BRIEF DESCRIPTION OF THE FIGURES
2a
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PCT/US2013/041386 [009] FIG. 1 is a diagram of an embodiment of a pipeline conditioning system from one or more subsea wells to a floating production, storage and offloading (FPSO) unit.
[010] FIG. 2 is a diagram of a pipeline conditioning system with one or more intermediate collection and / or processing facilities.
DETAILED DESCRIPTION [Oil] The following terms will be used throughout the specification with following meanings unless otherwise indicated.
[012] “Hydrocarbons” refers to hydrocarbon streams such as crude oils and / or 10 natural gases.
[013] “Produced fluids” refers hydrocarbon gases and / or liquids such as crude oil that is removed from a geologic formation via a production well, including mixtures of hydrocarbons and water that is typically extracted with the hydrocarbons.
[014] “Crude oil” refers to a hydrocarbon material, including both crude oil and 15 condensate, which is typically in liquid form. Under some formation conditions of temperature and/or pressure, the crude may be in a solid phase. Under some conditions, the oil may be in a very heavy liquid phase that flows slowly, if at all, e.g., as a slurry phase comprising oil sand or bitumen flecks. While the description described herein sometimes refers to “crude” or “crude oil,” the description of “crude oil” also includes hydrocarbon gases unless specified otherwise.
[015] “Production well” is a well through which produced fluids are carried from an oil-bearing geological formation to the earth's surface, whether the surface is the seafloor, a fixed or floating structure on water, or land. Surface facilities are provided for handling and processing the produced fluids from the formation upon the surface. Production well may be used interchangeably with wellhead or well.
[016] “Produced water” refers to the water generated in the production of oil and gas, including formation water (water present naturally in a reservoir), as well as water previously injected into a formation either by matrix or fracture injection, which can be any of connate water, aquifer water, seawater, desalinated water, industrial by-product water, and combinations thereof. In one embodiment, produced water is a component of produced fluids.
[017] “FPSO” (floating production, storage and offloading unit) is a floating vessel for the processing of hydrocarbons and for storage of oil / gas. In one embodiment, the FPSO processes an incoming stream of crude oil, water, gas, and sediment, and produce a
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PCT/US2013/041386 shippable crude oil with acceptable properties including levels of heavy metals such as mercury, vapor pressure, basic sediment & water (BS&W) values, etc.
[018] “Pipeline conditioning system” refers to a pipeline that contains produced fluids and at least one chemical reagent for the removal of at least a heavy metal from the produced fluids.
[019] “Trace amount” refers to the amount of heavy metals in a produced fluid.
The amount varies depending on the source of the fluid and the type of heavy metal, for example, ranging from a few ppb to up to 30,000 ppb for mercury and arsenic.
[020] “Heavy metals” refers to gold, silver, mercury, osmium, ruthenium, uranium, cadmium, tin, lead, and arsenic. While the description described herein refers to mercury removal, in one embodiment, the treatment removes one or more of the heavy metals from the produced fluids.
[021] “Mercury sulfide” may be used interchangeably with HgS, referring to mercurous sulfide, mercuric sulfide, or mixtures thereof. Normally, mercury sulfide is present as mercuric sulfide with a stoichiometric equivalent of one mole of sulfide ion per mole of mercury ion. Mercuric sulfide can be in any of the common crystal forms, e.g., cinnabar, metacinnabar, hypercinnabar, or combinations thereof.
[022] “Fixing agent” refers to chemical reagents that are added to the pipeline to form complexes with the heavy metals in the produced fluid, or to convert the heavy metals into compounds that are soluble in the dilution fluid, e.g., water, that is added to the pipeline to assist the flow of the produced fluid in the pipeline.
[023] The invention relates to a method for simultaneously transporting and removing heavy metals contained in produced fluids such as crude oil, gases and the like. In the course of being transferred through a pipeline with a sufficient amount of dilution fluid, e.g., water including produced water and / or lighter hydrocarbon, sufficient mixing occurs in the pipeline for reactions to take place between the fixing agent and heavy metals such as mercury, arsenic, etc. to be extracted into the dilution fluid or to precipitate out of the crude.
[024] Produced Fluids for Removal of Heavy Metals: Heavy metals such as lead, zinc, mercury, silver, arsenic and the like can be present in trace amounts in all types of hydrocarbon streams such as crude oils and natural gases. Some crude oils contain trace amounts of heavy mercury and/or arsenic. The amount of mercury and / or arsenic can range from below the analytical detection limit to several thousand ppb depending on the feed source.
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PCT/US2013/041386 [025] Arsenic species can be present in produced fluids in various forms including but not limited to trimethylarsine, arsine (Asfh), triphenylarsine (PliAs), triphenylarsine oxide (Ph3AsO), arsenic sulfide minerals (e.g., AS4S4 or AsS or AS2S3), metal arsenic sulfide minerals (e.g., FeAsS; (Co, Ni, Fe)AsS; (Fe, Co)AsS), arsenic selenide (e.g., As2Ses, As2Se3), arsenic-reactive sulfur species, organo-arsenic species, and inorganic arsenic held in small water droplets.
[026] Mercury can be present in produced fluids as elemental mercury Hg°, ionic mercury, inorganic mercury compounds, and / or organic mercury compounds. Examples include but are not limited to: mercuric halides, mercurous halides, mercuric oxides, mercuric sulfide, mercuric sulfate, mercurous sulfate, mercury selenide mercury hydroxides, organo-mercury compounds and mixtures of thereof. Mercury can be present as particulate mercury, which can be removed by filtration or centrifugation. The particulate mercury in one embodiment is predominantly non-volatile.
[027] In one embodiment, the produced fluid is a crude oil containing at least50 pbbw mercury. In another embodiment, the mercury level is at least 100 pbbw. In one embodiment of a mercury-containing crude, less than 50% of the mercury can be removed by stripping (or more than 50% of the mercury is non-volatile). In another embodiment, at least 65% of the mercury in the crude is non-volatile. In a third embodiment, at least 75% of the mercury is of the particulate or non-volatile type.
[028] In one embodiment, the produced fluid for transporting in the pipeline is in the form of a mixture of crude oil and water. For some production wells, the amount of produced water in the crude can be as much as 98% of the crude / water mixture transported in the pipeline.
[029] Pipeline Reaction: The pipeline reaction system effectively reduces levels of heavy metals such as mercury and / or arsenic from produced fluids with the addition of at least a chemical reagent as a fixing agent to the pipeline. The fixing agent can be introduced into the pipeline along with a dilution fluid or separately by itself without a dilution fluid, into the production well at the well head, into a manifold, into a location downhole in the wellbore, an intermediate location into a pipeline between the production well and a processing facility, or combinations of the above. In one embodiment, the dilution fluid is produced water in the production fluids.
[030] In one embodiment, the fixing agent is introduced into the pipeline at an entry point at the wellhead or close to the well head, e.g., within 1000 ft of the well head, and separate from the dilution fluid. In another embodiment, the fixing agent is introduced into
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PCT/US2013/041386 the production well along with a dilution fluid. In yet another embodiment, the fixing agent is introduced into a pipeline carrying a crude in a processing facility for the reaction to take place in the pipeline before the crude reaches its destination such as a piece of equipment in the facility.
[031] In one embodiment, the dilution fluid is non-potable water, e.g., connate water, aquifer water, seawater, desalinated water, oil field produced water, industrial byproduct water, or combinations thereof. In another embodiment, the dilution fluid is a lighter hydrocarbon, e.g., pentane, diesel oil, gas oil, kerosene, gasoline, benzene, toluene, heptane, and the like. Depending on the produced fluids to be transported and the type of dilution fluid employed, the volume ratio of dilution fluid to the produced fluid in the pipeline may range from 20:1 to 1:20 in one embodiment, 5:1 to 1:5 in another embodiment, and 4:1 to 1:1 in a yet another embodiment.
[032] In the pipeline, the fixing agent effectively extracts heavy metals from the produced fluid into a dilution fluid such as water. The pipeline is of sufficient length so that, in the course of transferring produced fluid through it, sufficient mixing of produced fluids and water occurs for reactions to take place between the fixing agent and the heavy metals, for heavy metals such as mercury to form insoluble complexes, or be extracted from the produced fluid into the water phase. In one embodiment wherein mercury reacts with the fixing agent to form insoluble complexes, the heavy metals can then be removed by filtration, settling, or other methods known in the art, e.g., removal of solids from a or gas liquid stream to produce a hydrocarbon product with reduced mercury content. In another embodiment wherein mercury reacts with the fixing agent and is extracted into the dilution fluid as a soluble compound, the Hg-enriched water phase can be separated from the crude by means known in the art, e.g., gravity settler, coalescer, separator, etc., at a processing facility at the destination of the pipeline to produce a hydrocarbon product with reduced mercury content.
[033] The pipeline is sufficiently long for a residence time of at least one minute in one embodiment, at least 10 minutes in another embodiment, at least 30 minutes in yet another embodiment, at least 10 hours in a fourth embodiment. The pipeline can be in the range of 20-200 hours that extends for hundreds if not thousands of kilometers. In one embodiment, the reaction takes place over a relatively short pipeline, e.g., at least 10 m but less than 50 meters for intra-facility transport. In yet another embodiment, the reaction takes place in pipeline sections for a long distance transport of at least 0.5 km, at least 50 km, at least 500 km and less than 10,000 km in another embodiment. In one embodiment the flow in the pipeline is turbulent, and in another embodiment the flow is laminar.
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PCT/US2013/041386 [034] For effective removal of mercury from the produced fluids with sufficient mixing to create a dispersion of water in a produced fluid such as crude oil, or oil in the water, the pipeline has a minimum superficial liquid velocity (based on combined oil and water phases) of at least 0.1 m/s in one embodiment; at least 0.5 m/s in a second embodiment;
and at least 5 m/s in a third embodiment. In one embodiment with the transport of certain produced fluids or under certain transport conditions, e.g., heavy oil and / or at or low superficial velocities, the natural mixing in the pipeline can be augmented with the use of mixers at the point of introduction of the fixing agent, or at intervals downstream in the pipeline. Examples include static or in-line mixers as described in Kirk-Othmer
Encyclopedia of Chemical Technology, Mixing and Blending by David S. Dickey, Section 10, incorporated herein by reference.
[035] Depending on the produced fluid being carried in the pipeline, e.g., oil sand with low viscosity, crude oil, etc., the temperature of the pipeline is maintained at a temperature of at least 5°C in one embodiment, at least 10°C in a second embodiment, and at least 10°C in a second embodiment. The produced fluid can be mixed with a heated dilution fluid at the production site before being pumped through the pipeline for the mixture in the pipeline to have a temperature in the range of 5-70°C at the entry point of the fixing agent. In one embodiment, steam or hot water containing fixing agents is injected at the entry point, or at intervals along the pipeline for the desired chemistry and temperature for the pipeline reaction to take place.
[036] The pipeline reaction system can be either land-based or located subsea, extending from a production site to a crude processing facility and receiving production flow from a surface wellhead or other sources. Examples include subsea pipelines, where the great depth of the pipeline can make the pipeline relatively inaccessible, and where the pipelines include a header or vertical section that forms a substantial pressure head. The pipeline system can be on-shore, off-shore (as a platform, FPSO, etc), or combinations thereof. For off-shore locations, the pipeline system can be a structure rising above the surface of the water (well platform) or it can be sub-surface (on the sea bed).
[037] In one embodiment where the production site is at a sufficient distance from the processing facility, the pipeline system includes intermediate separation, collection and / or processing facilities. The intermediate facilities contain one or more supply tanks to dispense fixing agents and / or other process aids, e.g., foamants, NaOH, diluents, etc., to facilitate the flow of produced fluids in into the pipeline. The intermediate facilities may also include equipment such as gravity separator, plate separator, hydroclone, coalescer,
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PCT/US2013/041386 centrifuge, filter, collection tanks, etc. for the separation, storage, and treatment of recovered water after separation from the crude. The separation is carried out at the destination in one embodiment, and at intervals along the pipeline in another embodiment.
[038] In one embodiment for a pipeline system within a production or processing facility, the pipeline may extend from a first equipment to another equipment located at a different location or section of the facility. The first equipment can be a vessel where the fixing agent is first introduced or mixed with the produced fluid. The second equipment can be a separator for the oil / water separation or another vessel. In one embodiment, additional chemical reagents such as complexing agents can be added to the second equipment to facilitate the oil / water separation to recover treated crude oil and waste water for subsequent water treatment or discharge.
[039] The wastewater after being separated from the treated crude is injected back into the oil or gas reservoir (in production or depleted) in one embodiment. In another embodiment, the wastewater is further treated being injected into the reservoir prior to being discharged. In another embodiment the wastewater is treated to meet environmental regulations for water quality and discharged.
[040] In one embodiment after the pipeline reaction, at least 50% of mercury is removed from the produced fluid for a mercury concentration of less than 100 ppbw in the treated hydrocarbon. In another embodiment, at least 50% of arsenic is removed from a produced fluid such as shale oil for an treated shale oil having less than 100 ppbw arsenic in the treated hydrocarbon. In yet another embodiment after the pipeline reaction, at least 50% of mercury is removed from the produced fluid for a mercury concentration of less than 50 ppbw in the treated hydrocarbon. In another embodiment, at least 50% of arsenic is removed from a produced fluid such as shale oil for an treated shale oil having less than 50 ppbw arsenic in the treated hydrocarbon. A least 75% of the heavy metals such as mercury and / or arsenic is removed from a produced fluid such as crude oil in one embodiment; and at least 90% in a second embodiment.
[041] Fixing Agent: In one embodiment for the removal of arsenic and / or mercury, the fixing agent is a sulfur-based compound for forming sulfur complexes with the heavy metals. Examples include organic and inorganic sulfide materials (including polysulfides), which in some embodiments, convert the heavy metal complexes into a form which is more soluble in an aqueous dilution fluid than in a produced fluid such as shale oil. In one embodiment, the sulfur based compounds are selected from sodium polysulfide, ammonium polysulfide, and mixtures thereof.
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PCT/US2013/041386 [042] In one embodiment, the fixing agent is a water-soluble monatomic sulfur species, e.g., sodium sulfides and alkali sulfides such as hydrosulfides or ammonium sulfides, for the extraction of mercury into an aqueous dilution fluid as soluble mercury sulfur complexes. In another embodiment, the sulfur-based compound is any of hydrogen sulfide, bisulfide salt, or a polysulfide, for the formation of precipitates which require separation from the treated produced fluid by filtration, centrifugation, and the like. In yet another embodiment, the fixing agent is an organic polysulfide such as di-tertiary-nonyl-polysulfide. In another embodiment, the sulfur based compound is an organic compound containing at least a sulfur atom that is reactive with mercury as disclosed in US Patent No. 6,685,824; the relevant disclosure is included herein by reference. Examples include but are not limited to dithiocarbamates, sulfurized olefins, mercaptans, thiophenes, thiophenols, mono and dithio organic acids, and mono and dithiesters.
[043] In one embodiment for the treatment / removal of heavy metals such as elemental mercury in the gas phase, the fixing agent is a polysulfide (organic or inorganic) which converts the elemental Hg into a species that is dissolved in the dilution fluid, e.g., HgS2H-.
[044] In another embodiment, the fixing agent is an oxidizing agent which converts the heavy metal to an oxidation state that is soluble in water. Examplary fixing agents include elemental halogens or halogen containing compounds, e.g., chlorine, iodine, fluorine or bromine, alkali metal salts of halogens, e.g., halides, chlorine dioxide, etc; iodide of a heavy metal cation; ammonium iodide; an alkaline metal iodide; etheylenediamine dihydroiodide; hypochlorite ions (OCf such as NaOCl, NaOCfi, NaOCfi, NaOCfi, Ca(OCl)2, NaClCfyNaClCk, etc.); vanadium oxytrichloride; Fenton’s reagent; hypobromite ions; chlorine dioxine; iodate IO3 (such as potassium iodate KIO3 and sodium iodate NalCb);
monopersulfate; alkali salts of peroxide like calcium hydroxide; peroxidases that are capable of oxidizing iodide; oxides, peroxides and mixed oxides, including oxyhalites, their acids and salts thereof. In one embodiment, the fixing agent is selected from KMnCU K2S2O8, lUCrO?, and C’f. In another embodiment, the fixing agent is selected from the group of persulfates. In yet another embodiment, the fixing agent is selected from the group of sodium perborate, potassium perborate, sodium carbonate perhydrate, potassium peroxymonosulfate, sodium peroxocarbonate, sodium peroxodicarbonate, and mixtures thereof.
[045] In one embodiment in addition to at least a fixing agent, a complexing agent is also added to the fixing agent to form strong complexes with the heavy metal cations in the
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PCT/US2013/041386 produced fluids, e.g., Hg2+, extracting heavy metal complexes from the oil phase and / or the interface phase of the oil-water emulsion into the water phase by forming water soluble complexes. Examples of complexing agents to be added to an oxidizing fixing agent include hydrazines, sodium metabisulfite (Na2S20s), sodium thiosulfate (Na2S2O3), thiourea, thiosulfates (such as Na2S2O3), ethylenediaminetetraacetic acid, and combinations thereof.
In one embodiment with the addition of a complexing agent to a fixing agent, the fixing agent is added to the pipeline first to oxidize the heavy metal, then the complexing agent is subsequently added to form a complex that is soluble in water. The complexing agent can be injected at intervals along the pipeline, or it can be subsequently added after the introduction of the fixing agent.
[046] The fixing agent can be added as in a solid form, or slurried / dissolved in a diluent, e.g., water, alcohol (such as methanol, ethanol, propanol), a light hydrocarbon diluent, or combinations thereof, in an effective amount for the treated produced fluid to have a mercury concentration of less than 100 ppbw. Effective amount means a sufficient amount for a molar ratio of fixing agent to heavy metals ranging from 1:1 to 100,000:1 in one embodiment, 5:1 to 20,000:1 in a second embodiment; from 50:1 to 10,000:1 in a third embodiment; from 100:1 to 5,000:1 in a fourth embodiment; and from 150:1 to 500:1 in a fifth embodiment. If a complexing agent is to be added to the pipeline reaction to effectively stabilize (forming complexes with) soluble heavy metals, e.g., mercury, in the oil-water mixture, the amount as molar ratio of complexing agent to soluble mercury ranges from 2:1 to about 100,000:1 in one embodiment; from 5:1 to about 3,000:1 in a second embodiment; and from 20:1 to 500:1 in a third embodiment.
[047] The fixing agent can be injected into the pipeline or into a location downhole using conventional equipment known in the art such as metering pumps or jet pumps. In one embodiment with the addition of both an oxidant as a fixing agent and a complexing agent, the oxidant can be added to the pipeline and then mixed by a first static mixer. The complexing agent can be added and mixed with a second static mixer, then allowed to enter the pipeline for the reaction to go to sufficient conversion.
[048] Some of the fixing agents may require special handling, e.g., corrosion resistant equipment and / or safety procedures. In one embodiment with the use of sodium hypochlorite as a fixing agent, the solution can be generated on-site with the use of commercially available electro-chlorination system, allowing the generation of sodium hypochlorite on-site for injection directly into the pipeline. In another embodiment, the pipeline reaction is allowed to take place in a section that provides sufficient residence time
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PCT/US2013/041386 for the removal of the target heavy metals from the produced fluids. For example, the pipeline reaction section requiring special handling can run from the production well to an intermediate processing facility located a short distance from the production well, for the collection and separation of the treated produced fluids from waste water containing heavy metals and corrosive fixing agents. Additional aqueous dilution fluid can be injected into the pipeline for the transport of the treated produced fluids from the intermediate processing facility to the final destination, e.g., shipping terminal or FPSO.
[049] Figures Illustrating Embodiments: Reference will be made to the figures to further illustrate embodiments of the invention.
[050] FIG. 1 is a diagram of an exemplary floating production, storage and offloading (FPSO) unit with a pipeline conditioning system for removing heavy metals from hydrocarbons such as oil and gas from one or more subsea wells 102. In one embodiment, a system 104 for dispensing at least a fixing agent into the pipeline deployed in conjunction with the facility 100 is located at a water surface 106. The dispensing system 104 services one or more subsea production wells 102 residing in a seabed 108. Conventionally, each well 102 includes a wellhead 112 and related equipment positioned over a wellbore 114 formed in a subterranean formation 116. Production fluid is conveyed to a surface collection facility such as the FPSO 100 or separate structure, such as an intermediate collection and / or processing facility (not shown), via a pipeline 120. The fluid may be conveyed to the surface facility 100 in an untreated state or after being processed, at least partially, by an intermediate collection and / or processing facility (not shown). The line 120 extends directly from the wellhead 112 or from a manifold (not shown) that receives production flow from a plurality of wellheads 112.
[051] The flow line 120 includes a vertical section or riser 124 (not shown) that terminates at the FPSO 100. The dispensing system 104 continuously or intermittently injects at least a fixing agent into the flow line 120 or the well 102 for the removal of heavy metals.
[052] In one embodiment, the dispensing system 104 can be utilized with one or more sensors 132 positioned along selected locations along the flow line 120 and the well
102. During production operations, the dispensing system 104 supplies (or pumps) one or more fixing agents to the flow line 120. This supply of fixing agents may be continuous, intermittent or actively controlled in response to sensor measurements. In one mode of controlled operation, the dispensing system 104 receives signals from the sensors 132 regarding a parameter of interest relating to a characteristic of the produced fluid, e.g.,
WO 2013/173602
PCT/US2013/041386 temperature, pressure, flow rate, amount of water, concentration of heavy metals in the produced fluids based on the formation of intermediate complexes, etc. Based on the data provided by the sensors 132, the dispensing system 104 determines the appropriate type and / or amount of fixing agents needed for the pipeline reactions to take place to reduce the concentration of mercury, arsenic, and the like.
[053] In embodiments, the dispensing system 104 can include one or more supply lines 140, 142, 144 that dispense fixing agents, e.g., fixing agents such as sodium hypochlorite, etc., into the pipeline 120 at a location close to the wellhead, or right at the wellhead 102, in a manifold (not shown) or into a location downhole in the wellbore 114, respectively. The supply tank or tanks 146 and injection units 148 can be positioned on the surface facility 110 for continuous supply to the dispensing system 104. In other embodiments, one or more of the supply lines 140, 142, 144 can be inside or along the pipeline 120, for intermittent dispensing of fixing agents into the pipeline 120 for the removal of heavy metals.
[054] While multiple dispensation points are shown in FIG. 1, it should be understood that a single dispensation point may be adequate. Moreover, the above-discussed locations are merely representative of the locations at which the fixing agents can be dispensed into the production fluid for the pipeline reactions. The pipeline 120 can extend on land between a production well at a remote location to a facility 100 located in a refinery or a shipping terminal. Lastly, the dispensing system 104 is not limited to the dispensing of fixing agents for the removal of heavy metals. It can also be used for the addition of other process aids into the pipeline.
[055] In one embodiment as shown in FIG. 2, the pipeline reaction system further includes intermediate collection and / or processing facilities. As shown, oil platform 2 is connected to receive production fluid from a wellhead 4 via pipeline 10, and pipeline 12 for the supply of a dilution fluid needed for the removal of heavy metals. The wellhead tree 4 is connected by an output pipeline 6 to a first processing facility 8, which is connected by pipeline 10 and pipeline 12 to a second processing facility 14 situated remotely therefrom. The facilities 8 and 14 may be floating and/or tethered to the seabed. In one embodiment, the facilities contain one or more supply tanks to dispense fixing agents or other process aids into the pipeline 10. In another embodiment, the facility may include equipment such as gravity separator, plate separator, hydroclone, coalescer, centrifuge, filter, etc., for the collection and separation of crude oil from water containing heavy metals, and the discharge of waste water containing removed mercury into pipeline 86 to a reservoir under wellhead 78.
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Claims (2)
1/2
FIG. 1
I
WO 2013/173602
PCT/US2013/041386
1. A method for simultaneously transporting and removing a trace amount of heavy metals from a produced fluid, comprising:
5 transporting a mixture of produced fluid and dilution fluid in a pipeline from a production well to a processing facility;
injecting into the pipeline carrying the produced fluid an effective amount of a fixing agent to form a mixture for at least a portion of the heavy metals to react with the fixing agent forming heavy metal complexes that are insoluble in the produced fluid and the
10 dilution fluid while the mixture is being transported in the pipeline before the produced fluid reaches the processing facility; and separating the insoluble heavy metal complexes from the dilution fluid and produced fluid for a treated hydrocarbon stream having a reduced concentration of heavy metals;
15 wherein the fixing agent is injected into the pipeline at an entry point to a well head of the production well or close to the well head;
wherein the pipeline is at least 0.5 km; and wherein the mixture is being transported in the pipeline has superficial liquid velocity of at least 0.1 m/s.
>0
2. The method of claim 1, wherein the dilution fluid comprises produced water extracted from the production well with the produced fluid.
3. The method of claim 1, further comprising injecting the dilution fluid into the 25 pipeline prior to injecting an effective amount of a fixing agent into the pipeline.
4. The method of claim 3, wherein the dilution fluid is injected into the pipeline at a volume ratio of dilution fluid to production fluid of 20:1 to 1:20.
30 5. The method of claim 1, wherein the dilution fluid is water and the produced fluid is a crude oil.
6. The method of claim 1, wherein the heavy metals are selected from mercury, arsenic, and combinations thereof.
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7. The method of claim 1, wherein the fixing agent is injected into the pipe at a molar ratio of fixing agent to heavy metals ranging from 1:1 to 100,000:1.
5 8. The method of claim 1, wherein the heavy metals contain mercury, the dilution fluid is water, the fixing agent is a polysulfide compound for forming a solid mercury complex.
9. The method of claim 1, wherein separating the dilution fluid containing the
10 heavy metal complexes from the produced fluid comprises:
separating the dilution fluid containing the heavy metal complexes from the produced fluid by any of gravity separation, filtration, centrifugation, and combinations thereof for a treated produced fluid having a reduced concentration of heavy metals.
15 10. The method of claim 1, wherein the treated produced fluid has a mercury concentration of less than 100 ppbw.
11. The method of claim 1, further comprising recovering the dilution fluid after the separating step, for injection into an oil or gas reservoir.
12. The method of claim 1, wherein the separation of the dilution fluid containing the heavy metal complexes from the produced fluid is carried out on a floating production, storage and offloading (FPSO) facility.
25
13. The method of claim 1, wherein the separation of the dilution fluid containing the heavy metal complexes from the produced fluid is carried out at intervals along the pipeline.
14. The method of claim 1, wherein the separation of the dilution fluid containing
30 the heavy metal complexes from the produced fluid is carried out at a destination of the pipeline.
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15. The method of claim 1, wherein the fixing agent is a sulfur based compound selected from the group consisting of: a polysulfide, a disulfide, a sulfurized olefin, a thiophenol, a monothioester, or a dithioester.
5
16. The method of claim 1, wherein the fixing agent is a sulfur based compound selected from the group consisting of a disulfide, a sulfurized olefin, a monothioester, a dithioester, a dithiocarbamate, a mercaptan, a thiophene, a thiophenol, a monothiol organic acid, or a dithio organic acid.
0
17. The method of claim 1, wherein the fixing agent is a sulfur based compound, and wherein the sulfur based compound is not a compound selected from the group consisting of: a polysulfide or an alkali metal sulfide.
18. The method of any one of the preceding claims wherein the dilution fluid is a
5 light hydrocarbon phase.
19. The method of any one of the preceding claims wherein the dilution fluid is selected from the group consisting of: pentane, diesel oil, gas oil, kerosene, gasoline, benzene, toluene, leptane, methanol, ethanol, or propanol.
20. The method of any one of the preceding claims wherein the mixture has a temperature in the range of 5°C to 70°C at the entry point.
WO 2013/173602
PCT/US2013/041386
2/2
CM
FIG. 2
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US201261647674P | 2012-05-16 | 2012-05-16 | |
US61/647,674 | 2012-05-16 | ||
PCT/US2013/041386 WO2013173602A1 (en) | 2012-05-16 | 2013-05-16 | Pipeline reaction for removing heavy metals from produced fluids |
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EP2890666B1 (en) | 2012-08-30 | 2018-12-12 | Chevron U.S.A., Inc. | Process for removing heavy metals from fluids |
SG11201501705PA (en) | 2012-09-07 | 2015-04-29 | Chevron Usa Inc | Process, method, and system for removing heavy metals from fluids |
US20140121138A1 (en) * | 2012-10-30 | 2014-05-01 | Baker Hughes Incorporated | Process for removal of zinc, iron and nickel from spent completion brines and produced water |
US20140339137A1 (en) * | 2012-10-30 | 2014-11-20 | Baker Hughes Incorporated | Methods for removing metals and cations thereof from oil-based fluids |
WO2016004232A1 (en) * | 2014-07-02 | 2016-01-07 | Chevron U.S.A. Inc. | Process for mercury removal |
CN106398748B (en) * | 2015-07-27 | 2018-09-28 | 中国石油化工股份有限公司 | A kind of method of hydrocarbon ils deferrization agent and hydrocarbon ils deferrization |
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WO2012036986A2 (en) * | 2010-09-16 | 2012-03-22 | Chevron U.S.A. Inc. | Process, method, and system for removing heavy metals from fluids |
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WO2012036986A2 (en) * | 2010-09-16 | 2012-03-22 | Chevron U.S.A. Inc. | Process, method, and system for removing heavy metals from fluids |
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EP2850154A1 (en) | 2015-03-25 |
AU2013262703A1 (en) | 2014-11-06 |
CL2014003085A1 (en) | 2015-02-20 |
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US20130306310A1 (en) | 2013-11-21 |
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CN104302738A (en) | 2015-01-21 |
WO2013173602A1 (en) | 2013-11-21 |
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