SU816406A3 - Method of exploiting oil deposit - Google Patents

Abstract

The invention relates to a process for the secondary extraction of petroleum from petroleum deposits, oil sands and oil shale. The process involves using as flooding medium an aqueous dispersion of one or more glycolipids.

Description

The invention relates to the oil industry, in particular to the development of oil fields by. injection into oil reservoirs of agents displacing oil. There is a method of developing petroleum deposits by injection into a micellar dispersion. Consisting of petroleum sulfonate, hydrocarbon, detergent, and water W. However, when contacted with Reservoir waters containing divalent metal ions, the micelle dispersion is destroyed and the efficiency of the method of developing oil fields decreases. Also known is a method of developing a petroleum reservoir by flooding an oil reservoir with an aqueous dispersion of a non-ionic surfactant 2J. The disadvantage of this method is the low oil recovery associated with the formation of a deposited product. The purpose of the invention is to increase oil recovery by preventing the formation of deposition products. The goal is achieved by using glycolipids of the following structures as surfactants:

Oh

G & J

816406

n

n

Ri

four

H

R,

ibtg

n

n

 5g

one

n g

3 n

3

RI

/

l

n x

Rz

"five

Jd

Ri

ABOUT

Ying

n

and

.R2 n

.

nRI

HRI wherein in Formulas Ha and, JT.a groups R, -R are in cis- or transkonfighg radios, and R / -R - hydroxyl, adk.oksilny, alkylcarbonyloxy alkylcarboxamide, aminoostatok, RJ oxymethylene, aminomethylene, alkoksimetilenovy, gshkilkarbon tksymetilenovy , apkylcarboxamidN-methylene, carboxyl, carboxamide, alkoxycarbonyl,. L-clylcarboxamide residue, as well as R, Rf: are: one or various of these functional groups - with alkyl residues With C / e .... In formulas 16 and 6, glycosidic bonds 1,1; 1.2; 1.3; 1.4; 1.6 in the anomeric forms "g, -dl-oi and the groups ft, -Rj in the 1,2,3,4 positions are in cis or trans configuration, and R, R, is a hydroxyl alkoxy, alkylcarbonyloxy, alkylcarboxy (amide, amino and oxy {methylene, amino-methylene, alk-, oxymethylene, alkylcarbonyloxymethylene, alkylcarboxamide N-methylene, carboxyl, carboxyamide, sycoxycarbonyl, N-alkylcarboxamide residue, and RI-I, appendants, and aral i, ape, i-aryl with alkyl residues With Cfo "In the formulas J with and C with glycosidic e bonds 1,2; 1,3; 1,4; 1,6 in anomeric forms with and / 3 in formula f with branching within the oligosaccharide, glycosytic bonds 1,2; 1,3; 1.4; 1.6 in the anomeric forms ot and in the group R / and R in the positions 5/3 and 4 are in cis or trans configuration, and also in the formula Tc n is 1.5-5 and c. Formula .j / c p is 1-3; R; and R is a hydro strong, alkoxy; al to il arbonyloxy, alkylcarboxamide or amino residual; alkoxycarbonyl ny or N-alkylcarboxamide residue, and I, -R, are one GSS. or. various of these functional groups, with alkyl residues ... The monosaccharide part of the formulas Gai 7. a consists of glucose, fructose, mannose, galactose; at. The formulas Ja and f and the alkyl groups of the And, R substituents are unbranched and / or branched, saturated and / or. unsaturated, and (i) hydroxylated; The disaccharide part of formulas Gb and nb consists of trehalose, cellobiose maltose and isomaltose in formulas J6 and the ib alkyl groups of the substituent R, -RV are unbranched and / or branched, saturated and / or not saturated, and / or hydroxylated; The olgosaccharide portion of the formulas JT p.; And 1 / C is represented by amylose amylose, amylose, cellulose, dextrins, chitin, yeast glucan, pullulan and glycogen derivatives; R / -RJ substituent groups are straight and / or branched, saturated and / or unsaturated and / or hydroxylated; and the glycolipid concentration of 0.01-5 g / l is established in the aqueous dispersion. , The flooding is carried out in such a way that a drill core containing oil and film water is first flooded with about ten times the total pore volume of saline (sea) water. This amount is sufficient to achieve residual oil saturation, further lower as a result of the presence of salt water; By flooding with saline (sea) water, approximately 50% of the oil contained in the garbage is obtained from the beginning of flooding. Enter the following substances. in an amount of, for example, 0.2-2 pore volumes, recovery of oil from core is achieved up to 80% of the total amount of oil: b-O-octadecanoyl O-glucose / 3-0-texadecanoyl-4-O-octadeuatrien 6-9, 12 oyl -e-: y-oxydecanoyl-O-galacto for; 2-O - / - decanyl-oxy-dodecano and 4-o-tridecanyl-0-glucuronate; 2-N-OJC tadecanoyl-O-M-mannose. The invention is illustrated by examples. Three liters of tidal water are mixed with 450 mg of b-di-O-inC-tetradecanil-voxy-hexadecenoyl-9-oil-V / / trehalose (compound 1) and using a magnetic stirrer while being sonicated, mix for about 15 minutes at plus 10C. The accustomed aqueous dispersion is used to improve the production of oil and the oil-containing core, which is watered up with salt water, g / l 102 NaCf, 28 CaCl ,, 10 MdSL. The permeability of the core at 140s is about 1,800 millidarcies, the viscosity of oil at 40 ° C is about 30 centipoise, the density is at 0.87 g / cm. The core has the following characteristics: length 27 cm, diameter 5 cm, porosity 20%, pore volume 115 cm. Water flooding occurs at a constant rate of 60 ml / h using compound (1)., The results obtained after the water flooding are given in the table. To solve the problem of the invention, the following glycolipids can be used, for example: 6,6-di-O-heptadec-1H1SH3-hydroxy-triacontanoyl-saAarose. Z-Ou ndekanil-; 3-oxytetradecane-2 -11, 14-O-docosadienoyl-cellulose, 2-O-tridecanryl-6-O-6-hexadecanoylaltosis 6,6-di-O-octadecanoyl-4gDI-6 -hexsschean-6-oyl-isomaltose.

The use of an aqueous glycolipid dispersion reduces the surface tension from about 30 dyn / cm to less than 0.1 dyn / cm.

The presence of the following substances in an amount of 0.2-2 pore volume ensures the extraction of oil from the core up to 80% of the total oil recovery: b-three-octadecanoyl-cellotriosis, 6-three-0-pentadecanoyl-2-three-O-bgec. -maltotriosis b-di-O- -decanyl-b-hydroxy-dodecanoyl-2-tri-O-tetradecanoyl-panose

2,3-hexa-pentadecanyl-Three-D-mannuronate.

The proposed method of developing a petroleum reservoir has the advantage that when it is used to enhance oil recovery when a water-dispersion of glycolipids is introduced into the reservoir, no product precipitates. Denys with iron ions and alkaline-earth metals from the reservoir waters.

In addition, glycolipids of a specific structure used for the preparation of an aqueous dispersion can be obtained in various ways, for example by biosynthesis, chemical synthesis, or by extraction from biological material.

The monosaccharides used in the process of the invention can be obtained from substances containing acidic groups or

five

Q n

R

FROM substances containing sugar acids with hydroxyl groups.

mg /;

Maxi (1) extraction of the maximum amount of oil residues% of the initial oil content, including subsequent water flooding with salt water

Claims (8)

Invention Formula 1, A method of developing a petroleum reservoir by flooding an oil reservoir with a water dispersion of a non-ionic surfactant, characterized in that glycolipids of the following structures are used as surfactants to increase reservoir recovery by preventing the formation of deposition products: Pa VcHi-Ri Off VcHa-Ri where in formulas 1a and Ia of the group R, -RV are in. cnc or transcrank., and r; alkoxycarbonyl, N-alkylcarboxamide residue, RI-RJ; are one or different of these functional groups with alkyl groups Cj-Cgo; in formulas 16 and L & glycosidic linkages 1,1; 1.2; 1.3; 1,4 1,6 in the anomeric forms oi o (; i, J, ft, / and the groups R, -Rg in the positions 1,2,3,4 are in the cis-trans configuration, and the hydroxyl alkoxy, alkylcarbonyloxy gshdilcarboxamide, amino residue and Rjj - oxymathylene, aminomethylene, alkoxymethylene, alkylcarbonyl oxymethylene, alkylcarboxamide N-methylene, carboxyl, carboxyamide, alkoxycarbonyl, N- H N  ABOUT H RH alkylcarboxamide residue as well as R / -R are one or different of these functional groups with alkyl residues Cj-Cf), in formulas Jc and glycosidic linkages 1,2 i / 3; 1.4; 1.6 in anomeric forms (C and / 3 in the formula L., with branching within the oligosaccharide, glycosidic link 1,2; 1,3; 1,4; 1,6 in the iomeric forms "(and / 3 and groups R and R in positions 2,3 and 4 are in cisCli transconfiguration, as well as in formula J with p equal to 1.5 and in formula p equal to 1-3; R; and R is hydroxyl, alkoxy alkylcarbonyloxy, alkylcarboxamide. or amino acid R. - hydroxymethylene, aminomethylene alkoxymethylene, alkylcarbonneloxymethylene, alkylcarboxamide-N-methylene, carboxyl, carboxamide, alkoxycarbonyl or Nalkylcarb ksamidny residue .i R -R are one or various of these functional groups with alkyl radicals Ci, -C «o. 2. The method according to paragraph.n. 1 and 2, about tl and tea and the fact that the monosaccharide of the HIM part of the formulas / a and fa consists of KSHAK & LG of fructose, mannose, galacto ... 3. Method according to paragraphs. 1-3, and in that in the Ja Hfa formulas, 1% alkyl groups of the substituents are unbranched branched, saturated and / or unsaturated, and / or hydroxylated. 4. Method according to PP. 1-2,. about t and which, and with the fact that the disaccharide part, of the formulas b and b consists of trehalose, cellobiose, maltose-and yzomaltose. 5. The method according to claims 1-3, characterized in that in the formulas GB the alkyl groups of the substituents R (are unbranched and / or branched, saturated and / or unsaturated, and / or hydroxylated. 6. Method according to paragraphs. 1-2, characterized in that the oligosaccharide portion of the formulas Jc and | 7c are derivatives of amylopectin, amylose, cellulose, dextrins, chitin, yeast, live glucan, pullulan,; glycogen, 7. Method according to PP ,. 1-3, that is, with the fact that in the formulas, the Gs and C alkyl groups of the substituents R, -E3 are, unbranched and / or . branched, saturated and / or unsaturated, and / or hydroxylated. 8. Method according to PP ... 1-5, about tl and h a.yu yi and with the fact that in the water dis. Persia is determined to have a concentration of 15 glycolipids of 0.01-5 g / l. Sources of information taken into account in the examination 1. US patent number 3500518, 20. class. 166-273, publ. 1970 .. 2. US Patent No. 355.3130, cl. 252-855, published. 1971.