(WO202041258) Methods for paraffin removal and extended post-primary oil recovery 机翻标题: 暂无翻译,请尝试点击翻译按钮。

源语言标题
(WO202041258) Methods for paraffin removal and extended post-primary oil recovery
公开号/公开日
WO2020/041258 / 2020-02-27
申请号/申请日
WOUS2019/047186 / 2019-08-20
发明人
FARMER, SeanALIBEK, KenKARATHUR, Karthik, N.LEFKOWITZ, Andrew, R.NERRIS, AnthonyDIXON, TylerMOLDAKOZHAYEV, AlibekSHUMWAY, Martin, R.;
申请人
LOCUS OIL IP;
主分类号
IPC分类号
C09K-008/52 E21B-037/06
摘要
(WO2020/041258) The subject invention provides a three-part method for increasing the amount of oil recovered from an oil well, the method comprising (1) paraffin removal; (2) gas release; and (3) plugging. The combination of parts provides for enhanced oil recovery over an extended period of time, for example two weeks or longer. In preferred embodiments, the subject invention utilizes microorganisms and/or their growth by-products, as well as other environmentally-friendly compounds, to enhance oil recovery by removing paraffin deposits from a well and providing controlled production of carbon dioxide in the well.
机翻摘要
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地址
代理人
(WO202041258) SALIWANCHIK, David, R. et al. ([US])
代理机构
;
优先权号
2018US-62719773
主权利要求
(WO2020/041258) CLAIMS We claim: 1. A method for enhancing oil production from an oil well having paraffin deposits therein, the method comprising:   (1) applying one or more solvents, one or more surfactants, one or more yeast fermentation products, one or more chelating agents, and, optionally, one or more ammonium salts and/or co surfactants, to the oil well; and, optionally, immediately thereafter,   (2) mixing one or more chelating agents, a biosurfactant, a carbonate salt and water in the presence of a basic pH adjuster to form a basic composition; injecting the basic composition into the well either immediately prior to or immediately after injecting an acid solution into the well, wherein the basic composition and the acid react to cause a release of carbon dioxide gas inside the well; injecting brine or water into the well; and, immediately thereafter,   (3) injecting a plugging composition into the well. 2. The method of claim 1, wherein (1) improves oil production from the well by liquefying or dissolving solid paraffin deposits, dispersing and/or emulsifying precipitated paraffin back into crude oil, freeing stuck or floating rods, and/or opening up clogged channels in the well and/or equipment associated therewith. 3. The method of claim 1, wherein the one or more solvents, one or more surfactants, one or more yeast fermentation products, one or more chelating agents, and, optionally, one or more ammonium salts and/or co-surfactants of (1 ) are pre-mixed in water and/or brine fluid outside of the well and injected into the well as one liquid mixture, and 4. The method of claim 1 , wherein the one or more yeast fermentation products of (1) comprise a first yeast fermentation product comprising cultivated Wicker hamomyces anomalus , Starmerella bombicola, or Meyerozyma guilliermondii, and/or growth by-products thereof, and   wherein the one or more solvents and the one or more surfactants of (1 ) are not produced by the yeasts of the first yeast fermentation product. 5. The method of claim 1, wherein the one or more solvents of (1 ) are selected from isoamyl acetate, primary amyl acetate, d-limonene, dipentene, turpentine, and/or isopropyl alcohol. 6. The method of claim 1 , wherein the one or more surfactants of (1) are biosurfactants. 7. The method of claim 6, wherein the biosurfactants are glycolipids, lipopeptides, fatty acid ester compounds, flavolipids, phospholipids, high-molecular-weight biopolymers, lipoproteins, lipopolysaccharide-protein complexes, and/or polysaccharide-protein-fatty acid complexes. 8. The method of claim 7, wherein the glycolipids are rhamnolipids, rhamnose-d-phospholipids, trehalose lipids, trehalose dimycolates, trehalose monomycolates, mannosylerythritol lipids, cellobiose lipids, ustilagic acid, lactonic sophorolipids, and/or acidic sophorolipids. 9. The method of claim 7, wherein the lipopeptides are surfactin, iturin, fengycin, arthrofactin, viscosin, amphisin, syringomycin, and/or lichenysin. 10. The method of claim 6, wherein the one or more biosurfactants are fatty acid ester compounds having the following chemical formula:      wherein   Ri=Cg to C22 saturated or unsaturated hydrocarbon, or an epoxide, or cyclopropane thereof   Yi=H, C1-C5hydrocarbon, or hydroxyl at any position along Ri   Y2=H, C1-C5hydrocarbon, or hydroxyl at any position along R   Y3=H, CrC5hydrocarbon, or hydroxyl at any position along R2   Y4=H, CI-C5hydrocarbon, or hydroxyl at any position along R2   R2=C Cio saturated or unsaturated, branched or unbranched, hydrocarbon.   1 1 . The method of claim 10, wherein the fatty acid ester compounds are oleic fatty acid ethyl esters and/or oleic fatty acid methyl esters. 12. The method of claim 6, wherein the biosurfactants are in the form of a second yeast fermentation product that comprises fermentation broth resulting from submerged cultivation of biosurfactant-producing yeast,   wherein the fermentation broth comprises yeast cells, biosurfactants and yeast growth by products, and wherein the yeast of the second yeast fermentation product is not the same as the yeast in the first yeast fermentation product. 13. The method of claim 12, wherein the biosurfactant-producing yeast is Wicker hamomyces anomalus, Starmerella bombicola , or Meyerozyma guilliermondii. 14. The method of claim 6, wherein the biosurfactants are in purified form. 15. The method of claim 1 , wherein the one or more optional ammonium salts of (1) comprise ammonium hydroxide and/or monoammonium phosphate. 16. The method of claim 1, wherein the one or more chelators of (1 ) are selected from EDTA, citric acid, sodium citrate, and a mixture thereof. 17. The method of claim 1 , wherein (2) occurs about 60 minutes or less after (1).   1 8. The method of claim 1, wherein the basic composition of (2) comprises EDTA as the chelating agent, an acidic form sophorolipid as the biosurfactant, sodium bicarbonate (baking soda) as the carbonate salt, water, and sodium hydroxide as the basic pH adjuster. 19. The method of claim 18, wherein the basic composition comprises 20 g/L of EDTA, 5-15 g/L of the sophorolipid, 90-1 10 g/L of the sodium bicarbonate, and enough sodium hydroxide to completely dissolve the EDTA and bring the pH of the composition to 9.5 or greater. 20. The method of claim 1, wherein (2) comprises injecting the acid solution prior to injection of the basic composition.   21 . The method of claim 1, wherein (2) comprises injecting the acid solution after injection of the basic composition. 22. The method of claim 1 , wherein the acid solution of (2) comprises 25-35% citric acid. 23. The method of claim 1, wherein a quantity of acid solution in (2) is enough to lower the pH of the basic composition to 7 or below. 24. The method of claim 1, wherein brine or water of (2) has a pH of 3.0 or below, thus obviating the need for the acid solution. 25. The method of claim 1, wherein the plugging composition of (3) comprises sodium alginate, xanthan gum or guar gum. 26. The method of claim 25, wherein the plugging composition comprises 1.0-1.5% sodium alginate dissolved in water. 27. The method of claim 1, wherein after part (3), the oil well is shut in for 12 hours to 30 days, or until carbon dioxide release stops. 28. The method of claim 1, used to supplement and/or enhance an existing chemical, thermal and/or mechanical method of enhancing oil recovery.
法律状态
PENDING
专利类型码
A1
国别省市代码
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