WO2019045588A1 - Procédé pour augmenter le rendement de couches productrices de pétrole et composition pour améliorer le rendement de couches productrices - Google Patents

Procédé pour augmenter le rendement de couches productrices de pétrole et composition pour améliorer le rendement de couches productrices Download PDF

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WO2019045588A1
WO2019045588A1 PCT/RU2017/000631 RU2017000631W WO2019045588A1 WO 2019045588 A1 WO2019045588 A1 WO 2019045588A1 RU 2017000631 W RU2017000631 W RU 2017000631W WO 2019045588 A1 WO2019045588 A1 WO 2019045588A1
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water
composition
systems
injected
oil
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PCT/RU2017/000631
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Russian (ru)
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Айдар Алмазович ГАЗИЗОВ
Алмаз Шакирович ГАЗИЗОВ
Елена Игоревна ШАСТИНА
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Общество С Ограниченной Ответственностью "Иджат Ресурс"
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Priority to PCT/RU2017/000631 priority Critical patent/WO2019045588A1/fr
Priority to EA201700440A priority patent/EA201700440A1/ru
Publication of WO2019045588A1 publication Critical patent/WO2019045588A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds

Definitions

  • the invention relates to the oil industry, in particular, to a balanced composition for enhanced oil recovery and method of injection into the reservoir, and can be used in oil fields in injection and production wells with terrigenous and carbonate reservoirs, including with high heterogeneity and fracturing, to limit the inflow of formation water, level the displacement front, increase the formation’s coverage by exposure, involve low-permeability streams in operation and increase I oil.
  • composition for limiting the flow of formation water and the method of its injection disclosed in RU 2109939 C1, publ. 04/27/1998.
  • the composition for limiting the inflow of formation water that is pumped into the formation contains oil, surfactant, water, non-ionic surfactant (NSAW) and additionally wood flour in the following ratio of components, wt.%: Oil - 3-10, nonionic surfactants - 0.5-5.0; wood flour - 0.1-5.0; water - the rest.
  • the disadvantage of the above composition is that its action has limited applicability - only for injection wells and the method of its applicability has low efficiency when used on highly permeable heterogeneous formations that are in the late stages of development.
  • the prior art composition for limiting the flow of formation water and the method of its injection disclosed in SU 1298347 A1, 03/23/1987.
  • the composition for limiting the inflow of formation water that is pumped into the formation contains hypane, clay, fresh water, silicate and sulfonol — a mixture of sodium salts of alkyl benzene sulfonic acid, in the following ratio of components in masses%: clay — 0.5–2.0; sulfonol – 1 -3; sodium silicate, 1-3; hypan-40-60; fresh water - the rest.
  • clay — 0.5–2.0; sulfonol – 1 -3; sodium silicate, 1-3; hypan-40-60; fresh water - the rest.
  • the disadvantage of the above composition is the technological duration of its preparation at the well, weak coagulation in fields with low salinity of formation waters, the use of the composition does not effectively block the washed seams.
  • a known composition for treating subterranean formations that is pumped into the formation contains fluid on water based; a crosslinking agent and a gelling agent containing a polymer, which is a crosslinkable polymer, and a polymer, which is a biopolymer, where the biopolymer molecule (1) consists only of glucose or (2) has a main chain containing one or more units that include, at least, (a) one glucose unit and (b) one linear or cyclic pyranose-type monosaccharide unit, where (a) and (b) have different molecular structures, and where the ratio of biopolymer and crosslinkable polymer is from approximately 0.05: one of about 1: 1.
  • composition is the low efficiency of reducing water loss in the reservoir, due to the low adsorption capacity of crosslinkable polymers, destruction of biopolymers used in the process of preparation and injection into the reservoir, as well as the complexity of preparation of the composition in the winter, and the use of the composition can cause technological difficulties associated with plugging oil-saturated low-permeability zones of the formation of sand, the disadvantages include limitations of the applicability of the composition in high-temperature seams and the high cost of treating subterranean formations.
  • gel-forming composition based on polyacrylamide and staplers, disclosed in RU 2180039, publ. February 27, 2002.
  • the gel-forming composition which is injected into the reservoir, contains trivalent chromium salts, for which the gel formation time is pre-calculated using a mathematical model describing the behavior of the polyacrylamide system — chromium alum — mineralized water.
  • a disadvantage of the known gelling composition is the instability of the applied composition, which is expressed in the need to preliminarily determine the kinetic parameters of the gelation process of the composition used taking into account multiple parameters, namely the molecular weight of polyacrylamide, its degree of hydrolysis, concentration of polymer and crosslinker, temperature and pH of the medium, porosity and permeability rocks, etc. Moreover, after the calculations, the time of the gelation process should be longer than pitching the composition into the well, which reduces (limits) of its application to the wells.
  • composition for enhanced oil recovery of oil reservoirs which is pumped into the reservoir, contains aqueous solutions of surfactant - surfactant and polyacrylamide - PAA, while in the quality of surfactant solution is used 0.5-15% aqueous solution of anionic micelle-forming natural soap - AMNM, as a solution of PAA 0.3-5% aqueous solution of PAA with a molecular weight up to 18 million units and additionally 0, 1-1% aqueous suspension of ultrafine nanometric carbon - UDNMU, with the following ratio of components, wt.%: the specified solution AMHM - 10-90, the specified solution of PAA - 9.9-89, the specified suspension - 0, 1-1.
  • the method of injection of the composition to enhance oil recovery of oil reservoirs includes desorption of residual and capillary oil with aqueous solutions of surfactants and displacement of residual oil to production wells with highly viscous agents based on aqueous solutions of polyacrylamide, converted into "microgel” under the action of "crosslinkers", for example, aqueous solutions of salts metals.
  • the above disclosed composition is used, before which injection a mixture of 0.5–15% aqueous solution of AMMN and 0, 1–1% aqueous suspension of UFNMU is pumped into the oil reservoir, pushing it into the zone of contact between the oil displacement front and low-permeable clay part of the oil reservoir, it extracts metal salts from the clay material of the specified part for stitching the PAA and the formation of a microgel.
  • the technical solution disclosed in RU 2586356 C1 has low oil displacement efficiency and has limited applicability, especially when developing layered-non-uniform oil reservoirs with a water content of up to 98%.
  • Used in the composition of natural soap - AMNM hydrophilizes the surface of rocks, which complicates the displacement of oil, and one of the main disadvantages of micelle-forming natural soap, is that anionic micelle-forming solutions lose their stability (stability) when the salt content in the formation water is more than 15 g / l and is also unstable at a low salt concentration of 5 g / l and turn into water-oil emulsions and lose their oil-displacing qualities, in reservoir conditions the anionic micelle-forming natural soap is exposed to destr and biodegradation, which leads to an insufficient increase in the coverage of the deposit by exposure and reduces oil production, the low efficiency of the known composition, due to the use of natural soap with low oil-washing properties, also due to insufficiently low interfacial tension, the
  • the task of the claimed group of inventions is the development of a method and composition for enhanced oil recovery, allowing to ensure high efficiency in the development of oil fields in injection and production wells with terrigenous and carbonate reservoirs.
  • the technical result of the group of inventions is an increase in oil production and a decrease in the flow of formation water.
  • the method of enhanced oil recovery includes pumping a well into the formation of at least one cycle of a rim with a buffer fluid, including components of the composition containing acrylamide polymer, ultrafine silicon containing solid particles, a crosslinking agent in the form of salts of polyvalent metals and water, or at least one cycle of successive alternating rims with a buffer liquid, including components from the above composition, while - alternating fringes formed by the following sequentially injected slugs: aqueous acrylamide polymer solution, an aqueous polyvalent metal salt solution and the aqueous slurry of ultrafine silicon containing solids.
  • the composition additionally contains ultrafine systems with a self-organized nanosystem and / or resistant microcellular systems and / or resistant microemulsion systems and / or ultragel systems.
  • a rim containing ultra-dispersed systems with self-organized nanosystem and / or resistant micellar systems and / or resistant microemulsion systems and / or ultragel systems is pumped.
  • PPD water water for flooding of oil reservoirs
  • saline water including sea water, or oil are used as a buffer liquid.
  • Composition for enhanced oil recovery containing acrylamide polymer, ultrafine silicon containing solid particles, a crosslinking agent in the form of salts of polyvalent metals and water, in the following ratio of components in May. %:
  • the composition additionally contains ultra-dispersed systems with a self-organized nanosystem and / or resistant microcellular systems, and / or resistant microemulsion systems, and / or ultragel systems, with a volume ratio of the above composition and at least one of the listed systems equal to 1: (0.0005-0 3).
  • the method of enhanced oil recovery includes pumping a well into the formation at least one cycle of a 25-200 m 3 rim with a buffer fluid that forces the composition into the formation, with
  • This composition contains acrylamide polymer, ultrafine silicon containing solid particles, a crosslinking agent in the form of polyvalent metal salts and water.
  • Composition contains in May. %:
  • the composition additionally contains ultra-dispersed systems with a self-organized nanosystem and / or resistant microcellular systems, and / or resistant microemulsion systems, and / or ultragel systems, with a volume ratio of the above composition and at least one of the listed systems equal to 1: (0.0005-0 3).
  • the claimed composition is used in oil fields with terrigenous and carbonate reservoirs, including with high heterogeneity and fracturing, for the treatment of injection and production wells, and no equipment change is required, the injection flow rate of the injection (production) well is refined, then through the ejector device, the mixing tank is supplied with a dry composition from the tank for storage and transportation of bulk materials and water from the injection line of the reservoir pressure maintenance system (RPM), fresh water from a reservoir or) oil, where the mixing and dispersion of the composition takes place. From the mixing tank, the dispersion is injected with plunger pumps into the well, through tubing pipes directly into the reservoir up to 25% of the current injectivity of the wells, then technological exposure is carried out and the well is mastered.
  • RPM reservoir pressure maintenance system
  • CH2CH (CONH2) -] n is a white or yellowish powder or granules with a polyacrylamide content of more than 90%, a molecular weight of 5-16 million or more (for example, DP 9-8177, FP 307, PHPA, Praestol 2540, DKS- ORP-F-40NT or equivalent).
  • ultrafine silicon-containing solid particles use at least one component selected from the group: Aluminosilicates of alkali and alkaline earth metals with an open carcass-cavity structure, the channel diameter of which on the surface of the crystal varies from 0.26 to 0.8 nm, for example, activated zeolite ZEOL TU 2163-001-27860096-2016; zeolite-containing component according to TU 38.1011366-94, containing oxides of silicon, aluminum, potassium, water; crumb synthetic zeolites or analogues; fine bentonite clay powder, more than 92% of the composition of which is represented by the rock-forming mineral - montmorillonite, the structural elements of which are aluminosilicate layers with a thickness of about 1 nm and a width of from 70 to 150 nm, (for example, PBM, PBMV, PBMA according to TU 39-0147001-105-93 or analogs); finely dispersed silicon dioxide (average
  • polyvalent metal salts are used as a crosslinking agent - chromium acetate (AH), chromium alum (HKK) universal chromic crosslinker (XC) according to ⁇ 2432-047-17197708-99, chromium nitrate, aluminum sulphate (SKA), aluminum chloride, aluminum potassium alum (ACC), aluminum ammonium alum (AAK).
  • AH chromium acetate
  • HKK chromium alum
  • XC universal chromic crosslinker
  • SKA aluminum sulphate
  • ACC aluminum potassium alum
  • AAK aluminum ammonium alum
  • sodium and potassium bichromates, manganese dioxide are used as a crosslinking agent; zinc chloride, cobalt naphthenate and octonate, thiourea, utropine, AMG reagent (modified gel-forming agent) according to TU 2146-003-42129794-2003, which is a mixture of alkali metal sulfite and chromium salts with a modifying additive.
  • Ultradispersed systems with a self-organized nanosystem (particle size 1, 0 nm -100 nm) according to TU 2458-022-47081684-2017 or according to TU 2458-019-87869324-2011 or analogues, and (or) stable mycelial systems (MS ) with a particle size of 10-10 4 nm (G. 3. Ibragimov, K.S. Fazlutdinov, N.I. Khisamutdinov. The use of chemical reagents for the intensification of oil production / Handbook.
  • the method of enhanced oil recovery includes pumping a well or at least one cycle of sequential alternating rims with a volume of 25 - 200 m 3 into the reservoir with a buffer fluid that forces the composition into the reservoir, the rims include the components of the above composition, sequentially alternating rims are made in the form of the following successively injected rims: an aqueous solution of acrylamide polymer, an aqueous solution of salts of polyvalent metals and an aqueous suspension of ul tradispersible silicon containing solid particles.
  • a rim is injected, containing ultradispersed systems with self-organized nanosystem and / or resistant micellar systems and / or resistant microemulsion systems and / or ultragel systems, with a ratio of total the volumes of the above rims and at least one of the listed systems is 1: (0.0005-0.3).
  • buffer volume of liquid fresh water from reservoirs, process water, water for flooding of oil reservoirs, mineralized water, including sea water
  • oil fresh water from reservoirs, process water, water for flooding of oil reservoirs, mineralized water, including sea water
  • oil fresh water from reservoirs, process water, water for flooding of oil reservoirs, mineralized water, including sea water
  • oil fresh water from reservoirs, process water, water for flooding of oil reservoirs, mineralized water, including sea water
  • oil fresh water from reservoirs, process water, water for flooding of oil reservoirs, mineralized water, including sea water
  • the number of rims during injection is up to 30, and the number of cycles reaches up to 20.
  • the values of permeability are calculated before and after processing by the proposed method.
  • the change in filtration properties of the porous medium is determined by the values of water mobility and the residual resistance factor.
  • composition is injected with a series-alternating rim of the injection well terrigenous reservoir model (one cycle).
  • the first fringe - a solution containing wt.%: 0.01 PAA (brand DP 9-8177) and water
  • the volume of the injected rim is 0.1, the pore volume (p. O)., (Vnop. Cm 3 ) of the bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 2nd fringe (crosslinking agent) - a solution containing, in wt.%: 0.0005 chromium acetate and 99.9995 water, then pumped with technical water buffer.
  • the volume of the injected rim is 0.02 p.
  • the volume of the injected buffer is 0.01 p.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 4th rim is a persistent mycelial system (from 10 nm to 100 nm) with a ratio of the total volumes of the aforementioned edges of the resistant mycelial system equal to 1: 0.01. Then pumped buffer water technical.
  • the volume of the injected rim is 0.015 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • composition is injected with a series-alternating rim model of a production well terrigenous reservoir (one cycle).
  • the first rim - a solution containing, in wt.%: 0.001 PAA (grade FP 307) and water 99.999, then pumped into anhydrous oil buffer.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the volume of the injected rim is 0.02 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 3rd rim is a suspension containing, in wt%: 1, fine bentonite clay powder, more than 92% of the composition of which is represented by the rock-forming mineral montmorillonite (brand PBMV) and 99 water, then anhydrous oil is pumped into the oil buffer.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 4th rim is a MAC with a self-organized nanosystem (1, 0 nm -100 nm) of the commodity form TU 2458-022-47081684-2017 with a ratio of the total volumes of the above-mentioned fringes and MAC with 1: 0.01.
  • the volume of the injected rim is 0.01 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • Table 2 The results of the impact of the rims during their injection into the reservoir are presented in Table 2.
  • the oil recovery coefficient of the reservoir was obtained 13.8%, which is 1, 2 times higher than the similar indicator of the prototype ( experience 11).
  • composition is injected with successive alternating rims in two cycles of the injection well terrigenous reservoir model.
  • the first fringe - a solution containing wt.%: 0.01 PAA (brand Praestol 2540) and water 99.99, then pumped with technical water buffer.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 2nd fringe (crosslinking agent) —a solution containing, in wt%: 0.05 sodium bichromate and 99.95 water, then pumping technical water buffer.
  • the volume of the injected rim is 0.025 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 3rd rim is a suspension containing, in wt.%: 3 finely dispersed bentonite clay powder of the PBMA brand and 97 of water, then pumped into the technical water buffer.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the first rim - a solution containing wt.%: 0.01 PAA (brand DP 9-8177) and water 99.99, then pumped with water in the SPD.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the volume of the injected rim is 0.025 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • Volume of injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 4th rim is a persistent UGS with a ratio of the total volumes of the above-mentioned rims and UGS equal to 1: 0.01, then a buffer of produced water is injected.
  • the volume of the injected rim is 0.015 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • composition is injected with sequential alternating fences in six cycles carbonate reservoir injection well.
  • the first rim - a solution containing, in wt.%: 0.001 PAA of the brand Praestol 2507 KI and water 99.999, then pumped buffer water PPD.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 2nd fringe (cross-linking agent) —a solution containing, in wt%: 0.001 potassium chrome alum and 99.999 water, is then injected with a PPD water buffer.
  • the volume of the injected rim is 0.025 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 3rd rim is a suspension containing, in wt%: 3, finely dispersed bentonite powder (PBMB grade) and water 97, then the PPD water buffer is pumped in.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 4th rim is the SDS with a self-organized nanosystem (1, 0 nm-100nm) of the commodity form TU 2458-019-87869324-2011 with a ratio of the total volumes of the above-mentioned rims and the SDA equal to 1: 0.01, then the water in the FPD is pumped.
  • the volume of the injected rim is 0.006 bp. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • composition is injected with sequentially alternating four-cycle rims of the injection well model in the conditions of the fields of Ukraine.
  • 1st fringe - a mixture containing, in wt.%: 0.1 PRA of the brand Praestol 2507 KI; 0.05 potassium bichromate; 1 fine bentonite powder (PBMV brand) and water 98.85 are then pumped with sea water buffer.
  • the volume of the injected rim is 0.2 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the volume of the injected rim is 0,012 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • composition is injected with successively alternating rims for five cycles of the injection well model in the conditions of the Udmurtia deposits a carbonate reservoir:
  • 1st fringe - a mixture containing, in mass%: 0.2 PAA; 0.2 chromium acetate + 2 mixtures of fine-grained bentonite powder brand PBMV and silicon dioxide, at a ratio of 1: 1 and 97.6 water, then pumped with water buffer PSD.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • 2nd fringe - MAC with a self-organized nanosystem (1, 0 nm-UNm) of the product form TU 2458-019-87869324-2011 with the ratio of the volumes of the composition of the rim 1) and MAC (equal to 1: 0.3), then pumped water buffer PSD .
  • the volume of the injected rim is 0,012 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the first rim is a solution containing, in wt.%: 0.3% PAA of the brand Praestol 2540 and water 99.7, then the mineralized water is pumped into the buffer with a salt concentration of 271 g / l.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 2nd fringe (crosslinking agent) is a solution containing, in wt.%: 0.1 AMG-1 and 99.9, then the mineralized water buffer is injected with a salt concentration of 271 g / l.
  • the volume of the injected rim is 0.025 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • 3rd fringe (UDSCTCH) - suspension containing, in wt.%: 3, a mixture of finely dispersed PBMV brand bentonite powder, zeolite and silicon dioxide, at a ratio of 1: 1: 1 and water 97.0, then the saline-treated water is pumped into the buffer with salt concentration 271 g / l.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the 4th rim - MES (particle size 5-10 5 nm), with a ratio of the total volumes of the above rims and MES equal to 1: 0.01, then the mineralized water buffer with salt concentration of 271 g / l is injected.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • composition is injected with successive alternating rims 1 cycle model of injection well in the conditions of the Udmurtia deposits terrigenous reservoir:
  • the volume of the injected rim is 0.2 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • the second rim is a MAC with a self-organized nanosystem (particle size 1, 0-
  • YUnm YUnm of the commodity form according to TU 2458-019-87869324-201 1 with a ratio of the total volumes of the above-mentioned rims and UDS equal to 1: 0.01, then the water buffer was pumped PPD.
  • the volume of the injected rim is 0.015 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • a composition containing a polymer of acrylamide, ultradispersed silicon containing solid particles, a crosslinking agent in the form of polyvalent metal salts and water containing in May is pumped into the well.
  • % acrylamide polymer - 0.005-3.0; ultrafine silicon containing solid particles - 0.5-5.0; salts of polyvalent metals - 0.0005-3.0; water - the rest.
  • the composition is pressed by a buffer fluid, for example, technical water.
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p.
  • Example 11 corresponds to example 10, except that ultradispersed systems with self-organized nanosystem and / or resistant micellar systems, and / or resistant microemulsion systems, and / or ultragel systems, with the volume ratio and at least one of listed systems equal to 1: (0.0005-0.3).
  • the volume of the injected rim is 0.1 p. bulk linear model.
  • the volume of the injected buffer is 0.01 p. The results of the impact of the composition during its injection into the reservoir, are presented in table 1.
  • Table 1-2 presents typical examples of the implementation of the invention and the impact on the achievement of the technical result based on the experiments.
  • the use of the stated ratios as cross-linking agents and UDFSTC, of other stated substances not disclosed in the examples leads to similar results.
  • the composition in reservoir conditions forms a colloidal solution, which has the property of thixotropy, namely: with constant dynamic effects, the solutions are a suspension, and in a state of relative rest - a gel-like mass.
  • the three-dimensional framework of the gel-like mass of the composition is formed by crystalline aluminosilicate plates (several hundred nm in diameter, about 1 nm thick) carrying charges: negative on the surfaces and positive at the ends.
  • adjacent plates can be oriented both parallel to each other (so-called dense contacts: in this case, the distance between them is determined by the balance of electrostatic, van der Wa-alsov and hydration forces), and perpendicularly each other.
  • the advantage of the composition is the presence of a significant relaxation time of nonequilibrium states: even in relatively dilute suspensions, relaxation processes can last for weeks and months, which increases the coverage of the formation with exposure and significantly increases the exposure time of the claimed composition in reservoir conditions, which lasts up to 5 years, and also, the applicability of the composition in waters of various types and salinity, and various reservoir temperatures.
  • the "sieve" effect of ultrafine silicon containing solid particles of the composition determines their selective ability to adsorb those components of hydrocarbons, the size of which molecules do not exceed the size of "windows", i.e. normal alkanes ( ⁇ ⁇ 6 ).
  • the additional activation of larger hydrocarbon molecules helps them overcome the potential barrier formed by hydrated exchange cations adsorbed on the inner surface of the particles, and these molecules can also penetrate into the channels of the particles.
  • Another characteristic feature, a pronounced ultrafine particles is the ease with which an exchange takes place between the cations, which balance the negative charge of the framework of the crystal lattice, and the cations in the surrounding aqueous solution.
  • Also used in the composition of ultrafine particles have strong water-repellent properties, adsorbed on the surface of the rock through the formation of chemical bonds - the processes of hydrophobization of rocks. This increases the adhesive properties of the claimed composition in reservoir conditions and increases the duration and effectiveness of its impact. These characteristics make it possible to selectively act on a water screen that forms in reservoir conditions, namely, to retain water and to pass oil.
  • UDS and / or stable mycelial systems and / or resistant microemulsion systems and / or ultragel systems Used additionally in the composition of the ultradispersed systems are UDS and / or stable mycelial systems and / or resistant microemulsion systems and / or ultragel systems, the most important feature of whose evolutionary processes is that they often lead to the emergence of self-organized structures with different ordering scales (nano-, meso-, micro- and macro-level) make it possible to more effectively influence low-permeability reservoirs and nano-objects of the reservoir system of oil fields, and contribute to the extraction of residual ( hard-to-recover oil reserves from carbonate and terrigenous reservoirs.
  • the particle size of the dispersed phase slightly exceeds the molecular solution, and the cross-linking agent which will allow to achieve more complete washing of film-retained oil from the pore space due to the properties of the reagents used: targeted regulation and impact on the nanosystems of oil reservoirs, low interfacial tension of less than 1 mN / m, the ability to break microemulsions in the pores of the reservoir, and, moreover, to ensure the possibility of using the composition in layers with different temperatures up to 120 ° C and waters of different composition and different salinity up to 271 g / l and more.
  • the claimed composition for enhanced oil recovery by displacing residual oil from watered formations, is more effective than the prototype and the application of the claimed composition is more technological and energy-saving.
  • the claimed technical solution allows it to be used both in terrigenous and carbonate formations, both production and injection wells, to significantly improve the filtration resistance of the reservoir R and increase the final oil displacement coefficient of the reservoir, at the same time isolate the reservoir penetration , both in thickness and in strike, to involve low-permeability interlayers in the work, through the use of nanoscale particles and nanoscale systems, more durable crosslinking of nanosized particles and their nanoscale channels with polyacrylamide, a crosslinking agent, formation rock and formation fluids.
  • composition in reservoir conditions can be used to enhance oil recovery in a wide range of reservoir temperatures and brine formation typical of fields in Western Siberia, the Ural-Volga region, Ukraine and other regions, significantly reducing energy costs, time and labor, the claimed composition is applied to standard equipment and does not require additional technological actions for cleaning the well bottom zone.
  • the Ns of experience is the growth ratio, the concentration of the reagent by the end of the exact

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Abstract

L'invention concerne l'industrie d'extraction du pétrole. Le procédé pour augmenter le rendement pétrolier de couches productrices consiste à injecter dans la couche du pouits au moins un cycle d'anneau avec un liquide tampon qui comprend les composants d'une composition contenant un polymère d'acrylamide, des particules solides ultradispersées contenant du silicium, un agent réticulant sous forme de sels de métaux polyvalents et de l'eau, ou au moins un cycle d'anneaux successifs avec un liquide tampon contenant des composés ayant la composition indiquée plus haut. Les anneaux alternés qui se suivent se présentent comme les anneaux suivants, injectés en séquence : solution aqueuse d'un polymère d'acrylamide, solution aqueuse de sels de métaux polyvalents, et suspension aqueuse de particules solides ultradispersées contenant du silicium. La composition pour augmenter le rendement de couches productrices comprend un polymère d'acrylamide, des particules solides ultradispersées contenant du silicium, un agent réticulant sous forme de sels de métaux polyvalents, avec le rapport suivant des composants, en % en masse: polymère d'acrylamide 0,005-3,0; particules solides ultradispersées contenant du silicium 0,5-5,0; sels de métaux polyvalents 0,0005- 3,0, l'eau constituant le reste.
PCT/RU2017/000631 2017-08-30 2017-08-30 Procédé pour augmenter le rendement de couches productrices de pétrole et composition pour améliorer le rendement de couches productrices WO2019045588A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/RU2017/000631 WO2019045588A1 (fr) 2017-08-30 2017-08-30 Procédé pour augmenter le rendement de couches productrices de pétrole et composition pour améliorer le rendement de couches productrices
EA201700440A EA201700440A1 (ru) 2017-08-30 2017-08-30 Способ повышения нефтеотдачи пластов и состав для повышения нефтеотдачи пластов

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PCT/RU2017/000631 WO2019045588A1 (fr) 2017-08-30 2017-08-30 Procédé pour augmenter le rendement de couches productrices de pétrole et composition pour améliorer le rendement de couches productrices

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RU2339803C2 (ru) * 2006-12-08 2008-11-27 Открытое акционерное общество "Татнефть" им. В.Д. Шашина Способ выравнивания профиля приемистости в нагнетательных скважинах и ограничения водопритока в добывающих скважинах
RU2528183C1 (ru) * 2013-07-02 2014-09-10 Газизов Айдар Алмазович Способ разработки нефтяной залежи
RU2562634C2 (ru) * 2013-12-24 2015-09-10 Айдар Алмазович Газизов Способ увеличения нефтеотдачи пласта
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