RU2769612C1 - Method for developing a heterogeneous oil reservoir - Google Patents

Abstract

FIELD: oil industry.

SUBSTANCE: invention relates to a method for developing a heterogeneous oil reservoir. The method consists in applying a microbiological impact on the formation under conditions of high salinity of the injected and formation water. The method includes successive injection of a mixture of a water-soluble natural polymer - WSNP - xanthan, fermenting bacteria - sapropel, water and a solution of diammonium phosphate - DAP with hydrocarbon-oxidizing bacteria - HOB into an injection well, followed by technological exposure. When the injectivity of the injection well is from 100 to 250 m³/day, the injection of the solution and the mixture into the formation is carried out by rims. The first slug is pumped with a solution of DAP with HOB, which additionally contains xanthan and water, at a ratio of components, wt.%: DAP solution with HOB - 10.0-15.0%, xanthan - 0.03-0.5%, water - rest. The second rim is pumped with a mixture of WSNP - xanthan, sapropel and water, which additionally contains a solution of DAP with HOB and a non-ionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, at the ratio of the components of the mixture, wt.%: DAP solution with VR - 10.0-15.0%, xanthan - 0.03-0.5%, non-ionic surfactants - 0.1-0.5%, sapropel - 0.5 -2.5%, water - the rest. The first and second rims are pumped in a 1:1 volume ratio. After injection of the rims, the well is stopped for a technological exposure lasting 5-10 days and waterflooding is resumed. When the injectivity of the injection well is from 251 m³/day or more, first, a mixture of WSNP - xanthan or a dispersed component and water is injected, at a ratio of components, wt.%: xanthan or a dispersed component - 0.5-2.5%, water - the rest. The injection of the mixture is carried out until the injection pressure is increased by 10-50% of the initial injection pressure. After that, a DAP solution with HOB and a mixture of WSNP - xanthan and fermentative bacteria are pumped into the reservoir. The first slug is pumped with a solution of DAP with HOB, which additionally contains xanthan and water, at the ratio of the components of the mixture, wt.%: DAP solution with HOB - 10.0-15.0%, xanthan - 0.03-0.5%, water - the rest. The second rim is pumped with a mixture of WSNP - xanthan, sapropel, water and a solution of DAP with HOB, which additionally contains a nonionic surfactant - non-ionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, at a ratio of the components of the mixture, wt.%: solution of DAP with HOB - 10 0-15.0%, xanthan - 0.03-0.5%, non-ionic surfactants - 0.1-0.5%, sapropel - 0.5-2.5%, water - the rest. The solution and mixture are pumped in a 1:1 volume ratio. After injection of the rims, the well is stopped for a technological exposure lasting 5-10 days and waterflooding is resumed. Powdered cellulose or technical microcrystalline cellulose is used as a dispersed component.

EFFECT: increase in oil recovery of production wells by changing and equalizing filtration flows in heterogeneous reservoirs, reducing the permeability of high-permeability zones of the reservoir, involving in the development of previously undeveloped low-permeability oil-saturated interlayers.

2 cl, 8 tbl

Description

The invention relates to the oil industry, in particular, to methods for developing a heterogeneous oil reservoir using microbiological impact under conditions of high salinity of the injected and formation water.

A known method for the development of an oil field (patent RU No. 2060373, IPC E21B 43/22, publ. -active substance KShAS (biosurfactant KShAS) is a product of the vital activity of bacteria of the genus Pseuodomonas aeruginosa S-7 at a mass ratio of polyacrylamide and biosurfactant KShAS 1:2.5, respectively.

This method is not effective enough in conditions of high mineralization of water, because. does not take into account the stability of the solution of polyacrylamide and biological surfactant in reservoir conditions.

Also known is a method for treating an oil reservoir (patent RU No. 2078916, IPC C09K 8/582, C12N 1/38, E21B 43/22, publ. bacteria, nutrient medium, mineral supplement and water. It contains organic fertilizer as a nutrient medium, and diammonium phosphate as a mineral additive.

The disadvantage of this method is its low efficiency in heterogeneous reservoirs due to the inability to ensure the redistribution of fluid flows in the reservoir and effectively displace oil from low-permeability oil-saturated zones due to non-targeted synthesis of oil-displacing agents in high water cut intervals.

Also known is a method for treating an oil reservoir (patent RU No. 1774691, IPC E21V 43/22, C09K 8/582, publ. 20.09.1995, Bull. No. 26), which includes injection into the reservoir of hydrocarbon-oxidizing bacteria - microorganisms in a nutrient solution.

The disadvantages of this method are the use of microorganisms that are not capable of synthesizing oil-displacing agents at high water salinity, which makes it impossible to use it under conditions of high water salinity.

The closest in technical essence is the method of developing a heterogeneous oil reservoir (patent RU No. 2644365, IPC E21V 43/22, S09K 8/582, S09K 8/588, publ. 09.02.2018, bull. No. 4), including sequential injection into the injection well of a mixture of water-soluble natural polymer - WFP - xanthan, fermentation bacteria - sapropel and water, and a solution of diammonium phosphate - DAP with hydrocarbon-oxidizing bacteria - UOB, and technological exposure.

The disadvantages of this method are:

- low values of the residual resistance factor (RFR), which do not provide a long-term technological effect due to the washing out of the composition from high-permeability intervals;

- low content of hydrocarbon-oxidizing bacteria in the injected solution, which leads to a low intensity of the formation of oil-displacing agents and their insufficient formation in conditions of highly depleted fields;

- hydrocarbon-oxidizing microorganisms used in this method do not have the property of halotolerance (salt resistance) under conditions of high (over 150 g/l) salinity.

The technical tasks are to create an effective method for the development of a heterogeneous oil reservoir, which provides an increase in the sweep of the reservoir by blocking highly permeable zones of the reservoir and involving low-permeability, oil-saturated layers and zones in the development, increasing oil recovery due to the growth directly in the reservoir of microorganisms that are resistant to high water salinity, capable of to carry out an intensive synthesis of agents that ensure the effective displacement of oil from the deep zones of the formation, as well as the expansion of the technological capabilities of the method.

Technical problems are solved by a method for developing a heterogeneous oil reservoir, including sequential injection into an injection well of a mixture of a water-soluble natural polymer - WFP - xanthan, fermentation bacteria - sapropel, water and a solution of diammonium phosphate - DAP with hydrocarbon-oxidizing bacteria - BOB and technological exposure.

What is new is that the injectivity of the injection well is preliminarily determined, when the injectivity of the injection well is from 100 m ³ /day to 250 m ³ /day, the indicated solution and mixture are injected into the reservoir by rims, and in the first rim, a DAF solution with VOB is pumped, which additionally contains xanthan and water, in the following ratio, wt. %:

DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 Water rest,

and the second rim is pumped with a mixture of VPP - xanthan, sapropel and water, which additionally contains a solution of DAF with RBW and a nonionic surfactant - non-ionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, in the following ratio of the mixture components, wt. %:

DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 nonionic surfactants 0.1-0.5 Sapropel 0.5-2.5 Water rest,

at the same time, the said first and second rims are pumped in a volume ratio of 1:1, after injection of the said rims, the well is stopped for a technological holding lasting 5-10 days and waterflooding is resumed, with an injection well injectivity of 251 m ³ /day and higher, the mixture of the runway is first injected - xanthan or dispersed component and water, in the following ratio of components, wt. %:

Xanthan or dispersed component 0.5-2.5 Water rest,

injection of this mixture is carried out until the injection pressure is increased by 10-50% of the initial injection pressure, then a DAP solution with VOB and a mixture of VPP - xanthan and fermentative bacteria are pumped into the reservoir, while injection is carried out in rims, in the first rim the DAP solution with VOB is pumped, which additionally contains xanthan and water, in the following ratio of components of the mixture, wt. %:

DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 Water rest,

in the second slug, a mixture of VPP - xanthan, sapropel, water and a solution of DAF with RBW, which additionally contains a nonionic surfactant - nonionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, is pumped in at the following ratio of the mixture components, wt. %:

DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 nonionic surfactants 0.1-0.5 Sapropel 0.5-2.5 Water rest,

at the same time, said first and second rims are injected in a volume ratio of 1:1, after injection of said rims, the well is stopped for a technological exposure lasting 5-10 days and waterflooding is resumed.

Also new is that powdered cellulose or technical microcrystalline cellulose is used as a dispersed component.

To implement the method use:

- food grade diammonium phosphate (DAF), produced in accordance with GOST 8515-75, which is an inorganic compound - an acidic ammonium salt of orthophosphoric acid;

- hydrocarbon-oxidizing bacteria - VOB, which are used as halophilic and halotolerant strains of microorganisms - Kocuria , Rhodococcus , Gordonia , Dietzia and Pseudomonas , with high salt tolerance (capable of withstanding exposure to more than 150 g / l of dissolved salts);

- domestic or imported xanthan, which is an exopolysaccharide obtained by fermentation using the bacterium Xanthomonas campestris ;

- sapropel, which is a deposit of freshwater reservoirs, consisting of organic matter and mineral impurities, formed as a result of biochemical, microbiological and physico-mechanical processes from the remains of plant and animal organisms inhabiting the reservoir;

- non-ionic surfactant - non-ionic surfactants, which is used as ethoxylated isononylphenol with a degree of oxyethylation of 12, produced according to TU 2483-077-05766801-98. The introduction of nonionic surfactants into the composition of the mixture contributes to the penetration of the mixture of the second slug into the depth of the reservoir by increasing the wettability, reducing the interfacial tension in the "water-oil-rock" system, due to the adsorption of nonionic surfactants on the phase separation surfaces;

- for the preparation of the injected solution of DAP with DRR and the mixture of VPP, fresh or technical water with a salinity of 0.15-200 g/l is used.

- technical microcrystalline cellulose (MCC) is used as a dispersed component, which is a product of chemical degradation of cellulose, characterized by a high degree of purity and a high content of an ordered part of cellulose with a crystallographic orientation of macromolecules (manufactured according to TU 10.89.19-006-01141317-2019) or powder cellulose (PC), which is a product of crushing from various types of cellulose - powder or fine fibers of white, gray or cream color, for example, grades C-0.5 and C-1.6 (manufactured according to TU 5410-029-32957739-2007) ;

The essence of the method is as follows.

In the process of successive injection into the reservoir of the indicated slug of the solution and the mixture containing the WFP, there is a decrease in the permeability of highly permeable zones of the reservoir due to their blocking with a viscous solution and, as a result, an increase in the coverage of the reservoir by the impact. In addition, since at the first stage hydrocarbon-oxidizing bacteria use the residual oil of the bottomhole formation zone as the main source of nutrition, the WFP is an additional source of carbohydrate nutrition for the DRR. After injection of a mixture of the second slug containing fermentative bacteria and nonionic surfactants, as the oxygen supply is depleted, the hydrocarbon-oxidizing ability of the microflora decreases and fermentation-type microorganisms begin to become more active, which do not require oxygen to oxidize the nutrient substrates.

During the technological holding of the solutions and mixtures injected into the reservoir, gradual microbiological breakdown of polysaccharides by bacteria occurs, which leads to the formation of a complex of oil-displacing agents (biosurfactants, volatile fatty acids), which improve the wettability of the rock, reduce the interfacial tension in the "water-oil-rock" system and increase interlayer permeability, and oil-displacing agents, including solvents and alcohols, which improve the recovery of residual oil, which is characterized by increased viscosity. As a result, a sequential microbiological process is formed, which leads to increased bioproduction of oil-displacing agents, which provide higher technological efficiency, which leads to an increase in oil recovery.

A solution of VPP - xanthan or a dispersed component performs the function of a fringe deflector and serves as an additional source of nutrition for microorganisms.

The method in field conditions is carried out as follows.

Preparatory work is carried out. Select a section of the injection well and analyze its development. Conduct a complex of hydrodynamic and geophysical studies. The injectivity (initial injectivity before injection of the solution and rims) of the injection well is determined at the injection pressure from the conduit, the salinity of the injected water, the maximum allowable pressure on the production string and productive formations. Production wells are determined that are hydrodynamically associated with the injection well. Based on the analysis of geological and technological indicators (reservoir permeability, porosity, oil and liquid flow rate for the area, water cut of the produced product), the initial injectivity of the injection well, the volumes of injection of rims consisting of a DAP solution with DRR and WFP and a mixture of fermentative bacteria, nonionic surfactants, The runway and the DAP solution with VOB, and at the well injectivity of 251 m ³ /day and above, the volumes of injection of a solution of a water-soluble natural polymer - xanthan or a dispersed component are additionally determined.

The volumes of injected compositions are determined depending on the injectivity of the injection well (Table 1).

Table 1 - The volume of injection of slug and a solution of a water-soluble natural polymer - xanthan or a dispersed component

Injection capacity of the injection well, m ³ / day The volume of injection of a solution of a water-soluble natural polymer - xanthan or a dispersed component, m ³ Injection volume of the first slug - DAP solution with DR and xanthan, m ³ Injection volume of the second slug - a mixture of sapropel, non-ionic surfactants, VPP and a solution of DAP with RBM, m ³ 100-250 - 100-250 100-250 251 and up 30-100 150-300 150-300

When the injectivity of the injection well is from 100 m ³ /day to 250 m ³ /day, the injection of these rims into the flooded oil reservoir is carried out using standard installations such as KUDR, TsA-320, etc. in the following sequence.

The first slug, consisting of a solution of DAP with VOB and WFP (xanthan), is prepared immediately before injection into the formation through an injection well as follows.

A solution of DAP with VOB is prepared in the shop for the preparation of chemical products as follows. The calculated amount of fresh water, VOB with a concentration of 0.005-0.5 wt. % and DAF with a concentration of 0.01-0.2 wt. %, stirred for 30 min to form a homogeneous solution. The finished solution is delivered to the well by tank trucks.

A pre-prepared solution of DAP with VOB with a concentration of 10.0-15.0 wt. %. The same container is supplied with water with mineralization from 0.15 g/l to 200 g/l, which is supplied through a conduit from a cluster pumping station or a pumping unit from a tank truck. Further, xanthan in dry form with a concentration of 0.03-0.5 wt. % and stirred until smooth. From the intermediate tank, the obtained first slug is pumped into the formation through the injection well by a pumping unit.

Then the second slug is loaded.

The second rim - a mixture of VPP - xanthan, sapropel, water, and a solution of DAP with AHB with non-ionic surfactants is prepared immediately before injection into the reservoir through an injection well in the following sequence.

A pre-prepared solution of DAP with VOB with a concentration of 10.0-15.0 wt. %. The same container is supplied with water with mineralization from 0.15 g/l to 200 g/l, which is supplied through a conduit from a cluster pumping station or a pumping unit from a tank truck. Further, nonionic surfactants - oxyethylated isononylphenol with a degree of oxyethylation of 12 with a concentration of 0.1-0.5 wt. % and stirred for 10 min. Then, dry xanthan with a concentration of 0.03-0.5 wt. % and mixed until homogeneous, after which dry sapropel is dosed from the bunker using a screw dispenser with a concentration of 0.5-2.5 wt. % and stirred for 10 min. From the intermediate tank, the obtained second slug is pumped into the reservoir through the injection well by a pumping unit.

The first and second rims are pumped in a 1:1 volume ratio.

After injection of the planned volumes of the indicated slug of the solution and mixture, the well is stopped for technological holding for 5-10 days.

After technological exposure, final work is performed on the well and waterflooding is resumed.

When the injectivity of the injection well is from 251 m ³ /day and above, a mixture of a water-soluble natural polymer - xanthan or a dispersed component and water is first pumped.

A solution of a water-soluble natural polymer - xanthan or a dispersed component is prepared in an intermediate tank of a KUDR type installation by supplying water with a salinity of 0.15 g/l to 200 g/l, coming through a conduit from a cluster pumping station or a pumping unit from a tank truck, to the inlet of a jet pump with simultaneous dosing screw dispenser of xanthan or dispersed component in dry form with a concentration of 0.5-2.5 wt. % and stir for 30 min.

The prepared solution of a water-soluble natural polymer - xanthan or a dispersed component is pumped into the formation through an injection well by a pumping unit until the injection pressure is increased by 10-50% of the initial injection pressure, not exceeding the maximum allowable pressure on the production string or productive formations.

Then, a DAP solution with VOB and a mixture of VPP - xanthan and fermentative bacteria are pumped in, while the pumping is carried out by slug. The first slug, consisting of a solution of DAP with VOB, xanthan and water, is directly prepared before injection into the reservoir through an injection well as follows.

A solution of DAP with VOB is prepared in the shop for the preparation of chemical products as follows. In a container with a mixing device contribute the estimated amount of fresh water, VOB with a concentration of 0.005-0.5 wt. % and DAF with a concentration of 0.01-0.2 wt. %, stirred for 30 min to form a homogeneous solution. The finished solution is delivered to the well by tank trucks.

A pre-prepared solution of DAP with VOB with a concentration of 10.0-15.0 wt. %. The same container is supplied with water with mineralization from 0.15 g/l to 200 g/l, which is supplied through a conduit from a cluster pumping station or a pumping unit from a tank truck. Further, xanthan in dry form with a concentration of 0.03-0.5 wt. % and stirred until smooth. From the intermediate tank, the obtained first slug is pumped into the formation through the injection well by a pumping unit.

Then the second slug is loaded.

The second slug - a mixture of VPP - xanthan, sapropel, water and a solution of DAP with VOB and nonionic surfactants is prepared immediately before injection into the reservoir through an injection well in the following sequence.

A pre-prepared solution of DAP with VOB with a concentration of 10.0-15.0 wt. %. The same container is supplied with water with mineralization from 0.15 g/l to 200 g/l, which is supplied through a conduit from a cluster pumping station or a pumping unit from a tank truck. Further, nonionic surfactants - oxyethylated isononylphenol with a degree of oxyethylation of 12 with a concentration of 0.1-0.5 wt. % and stirred for 10 min. Then, dry xanthan with a concentration of 0.03-0.5 wt. % and mixed until homogeneous, after which dry sapropel is dosed from the bunker using a screw dispenser with a concentration of 0.5-2.5 wt. % and stirred for 10 min. From the intermediate tank, the obtained second slug is pumped into the reservoir through the injection well by a pumping unit.

The first and second rims are pumped in a 1:1 volume ratio.

After injection of the planned volumes of the indicated slug of the solution and mixture, the well is stopped for technological holding for 5-10 days.

After technological exposure, final work is performed on the well and then waterflooding is resumed.

The oil-displacing ability of the injected solution and rims was evaluated in laboratory conditions by the magnitude of the increase in the displacement efficiency (increase in _Kvyt ) during filtration experiments. To conduct filtration experiments, a core test facility was used, which allows fluids to be filtered through a physical reservoir model at a temperature and pressure simulating reservoir conditions. Initial oil saturation was created in the model, then water was pumped to simulate primary displacement with water, _Kvyt was determined after primary pumping of water, then, when modeling injectivity from 100 m ³ /day to 250 m ³ /day, the first and second rims were pumped, then additional displacement was carried out with water and determined the total K _vyt . When modeling the injectivity from 251 m ³ /day and above, a solution of xanthan or a dispersed component was additionally pumped, then the first and second rims were sequentially pumped, then additional displacement was carried out with water and the total K _ex . The difference in the coefficients obtained was used to calculate the increase in K _vyt .

The research results are presented in table. 2.

Table 2 - Results of studies of oil-displacing properties, injected mud and rims

No. p / p Mineralization of water, g/l Permeability of a physical model of a porous medium (core), µm ² Initial oil saturation, % A solution of xanthan or dispersed component, wt. % The first slug, wt. % The second fringe, wt. % OFS To _vyt after primary pumping of water General K _vyt Growth K _vyt Xanthan Dispersed component Water DAP solution with VOB Xanthan Water DAP solution with VOB Xanthan nonionic surfactants Sapropel Water one 0.15 0.208 88.5 - - - ten 0.03 89.97 ten 0.03 0.1 0.5 89.37 39 42.3 53.9 13.4 2 120 0.243 90.7 - - - 12 0.03 87.97 12 0.03 0.1 0.5 87.37 44 46.7 59.6 12.9 3 200 0.283 90.5 - - - fifteen 0.03 84.97 fifteen 0.03 0.1 0.5 84.37 42 39.4 52.8 11.6 4 120 0.23 86.3 - - - ten 0.3 89.7 ten 0.03 0.1 0.5 89.37 51 32.7 47.6 12.9 5 200 0.273 91.5 - - - 5 0.5 94.5 5 0.03 0.1 0.5 94.37 28.7 38.7 48.2 7.6 6 200 0.254 91.5 - - - 12 0.3 87.7 12 0.03 0.1 0.5 87.37 54.5 46.5 61.2 11.4 7 120 0.21 94.1 - - - fifteen 0.3 84.7 fifteen 0.03 0.1 0.5 84.37 57 39.8 54.1 12.3 eight 0.15 0.352 89.8 - - - ten 0.5 89.5 ten 0.03 0.1 0.5 89.37 59.8 46.4 61.2 14.9 nine 0.15 0.33 92.8 - - - 12 0.5 87.5 12 0.5 0.1 0.5 86.9 58.8 41.5 56.9 15.4 ten 120 0.396 90.3 - - - fifteen 0.5 84.5 fifteen 0.03 0.1 0.5 84.37 60.7 36.8 51.7 13.1 eleven 0.15 0.266 84.3 - - - 5 0.01 89.99 ten 0.01 0.1 0.5 63.4 6 40.1 48.2 9.4 12 120 0.298 90.7 - - - ten 0.03 89.97 ten 0.3 0.1 0.5 89.1 58.6 42.3 57.6 14.0 thirteen 0.15 0.276 90.5 - - - 12 0.03 87.97 12 0.3 0.1 0.5 87.1 61.5 42.3 56.9 15.8 fourteen 200 0.273 87.5 - - - fifteen 0.03 84.97 fifteen 0.3 0.1 0.5 84.1 64.7 42.3 57.4 12.9 fifteen 120 0.28 93.7 - - - ten 0.3 89.7 ten 0.3 0.3 2.5 86.9 60.5 32.7 47.6 14.6 sixteen 0.15 0.229 89.2 - - - 12 0.3 87.7 12 0.3 0.3 1.5 85.9 58.5 48.5 63.1 16.0 17 120 0.244 91.4 - - - ten 0.5 89.5 ten 0.5 0.5 0.5 88.5 63.7 50.1 64.5 14.4 eighteen 0.15 0.383 95.6 - - - fifteen 0.5 84.5 fifteen 0.5 0.5 2.5 81.5 56.7 46.4 63.1 16.9 nineteen 200 0.377 92 - - - ten 0.3 89.7 ten 0.3 0.3 1.5 87.9 80.3 37.5 51.4 14.1 20 0.15 0.307 95.3 - - - 12 0.3 87.7 12 0.3 0.3 1.0 86.4 54.8 40.5 54.7 15.2 21 0.15 0.334 90.8 - - - 20 0.6 79.4 20 0.5 0.5 2.5 89.39 134.2 42.4 59.8 17.4 22 120 0.351 91.2 - - - fifteen 0.5 84.5 fifteen 0.5 0.5 1.5 82.5 66.1 41 54.1 14.4 23 0.15 0.453 84.6 0.5 - 99.95 ten 0.03 89.97 ten 0.03 0.1 0.5 89.37 88.6 41.5 54.2 13.7 24 120 0.457 91 - 2.5 (MC) 99.8 12 0.3 87.7 12 0.3 0.3 2.5 84.9 120 36.8 53.9 17.1 25 200 0.459 88.8 1.5 - 99.8 fifteen 0.3 84.7 fifteen 0.3 0.5 1.5 82.7 74.3 39.8 55 15.2 26 120 0.461 89.7 2.5 - 99.5 12 0.5 87.5 12 0.5 0.5 1.5 85.5 127.1 42.2 58.2 16.0 27 0.15 0.56 86.9 - 2.5 (MCC) 99.95 fifteen 0.03 84.97 fifteen 0.03 0.1 0.5 84.37 107.3 37.9 54.6 15.7 28 0.15 0.546 90.8 - 0.5 (PC) 99.8 ten 0.3 89.7 ten 0.3 0.3 1.0 88.4 103.7 45.5 58.3 14.8 29 200 0.543 94.7 - 2.5 (MC) 99.5 12 0.3 87.7 12 0.3 0.3 1.0 86.4 125 38.6 54.8 14.2 thirty 200 0.575 89.3 - 1.5 (MCC) 99.7 fifteen 0.5 84.5 fifteen 0.5 0.5 1.5 82.5 110 41 56.7 15.4 31 0.15 0.7 94.6 1.5 (MC) 99.95 12 0.03 87.97 12 0.03 0.1 0.5 87.37 118.4 48.8 61.9 13.1 32 120 0.669 92.7 0.5 - 99.7 ten 0.3 89.7 ten 0.3 0.3 1.0 88.4 70.3 48.3 60.6 12.3 33 0.15 0.668 94.3 - 0.5 (MCC) 99.8 12 0.3 87.7 12 0.3 0.5 1.5 85.7 102.1 45.9 58 16.1 34 200 0.615 87.5 - 1.5 (MCC) 99.5 fifteen 0.5 84.5 fifteen 0.5 0.5 1.5 82.5 125.7 47.2 63.1 15.4

Table 2 continued

Prototype No. p / p Mineralization of water, g/l Permeability of a physical model of a porous medium (core), µm ² Initial oil saturation, % A mixture of WFP and fermentative bacteria, wt. % VOB in DAF solution, wt. % OFS To _vyt after primary pumping of water General K _vyt Growth K _vyt Sapropel Xanthan Water DAP DRR Water one 0.15 0.204 87.3 0.005 0.05 99.89 0.05 0.01 99.94 10.9 38.7 46.3 7.6 2 120 0.412 92.5 1.0 0.05 99 0.05 0.01 99.94 22.1 40.2 49.1 8.9 3 200 0.298 90.1 2.0 0.05 97.95 0.1 0.15 99.75 24.8 32.8 43.8 eleven 4 120 0.318 87.3 0.005 1.0 98.995 0.05 0.15 99.8 15.3 40.8 50.2 9.4 5 200 0.461 95.0 1.0 2.0 97.0 0.1 0.3 99.6 28.7 39.1 51.6 12.5 6 0.15 0.573 92.4 2.0 1.0 97.0 0.2 0.01 99.79 30.4 42.5 54.8 12.3 7 0.15 0.476 84.3 0.005 2.0 97.995 0.05 0.15 99.8 24.6 44.7 57.7 12.8 eight 200 0.501 92.3 1.0 0.05 98.95 0.1 0.15 99.75 21.4 35.2 46.9 11.7 nine 120 0.623 90.0 2.0 0.05 97.95 0.2 0.3 99.5 26.8 35.8 47.9 12.1 ten 0.15 0.305 87.6 1.0 0.05 98.95 0.2 0.3 99.5 19.7 40.7 50.8 10.1 eleven 120 0.376 95.6 1.0 1.0 98 0.1 0.15 99.7 27.5 42.6 55.2 12.6 12 200 0.726 94 2.0 2.0 96 0.2 0.3 99.5 34.7 41.5 55.3 thirteen Note - Prototype studies were carried out by the applicant independently

The results of the research on the proposed method for the development of a heterogeneous oil reservoir (Table 2) indicate an increase in the residual resistance factor (RFR) by an average of 3.3 times compared with the prototype and an increase in the increase in the oil displacement efficiency (increase in K _ex ) by an average of 1 .4 times, which confirms the achievement of a higher technological efficiency of the method.

From Table. 2 it can be seen that the OFS and the increase in the oil displacement efficiency (increase in _Kvyt ) when using the method with low concentrations of the DAP solution with VAR (less than
10 wt. %) and xanthan (less than 0.03 wt. %) differ slightly from the prototype
(experiments 5, 11, Table 2).

The increase in the content of the DAP solution with VOB more than 15 wt. % and xanthan more
0.5 wt. % is impractical from an economic and technological point of view, since the cost of the reagents and, accordingly, the composition increases. The results of studies of the method with high concentrations of reagents show that an increase in the concentration of reagents makes it possible to slightly increase the OFS and the increase in the oil displacement efficiency (experiment 21, table. 2).

The proposed method allows to effectively reduce the permeability of highly permeable formation zones by creating rims with high filtration resistance, which leads to the involvement in the development of low-permeability, previously uncovered oil-saturated interlayers by increasing the bioproduction of oil-displacing agents by microorganisms resistant to high salinity, generally providing a higher technological efficiency of microbiological impact. The proposal also allows you to expand the technological possibilities of the implementation of the method.

An example of a specific implementation.

Example 1. An area with one injection well and three production wells was chosen as an object of pilot work. The formations are represented by terrigenous reservoirs with a permeability of 0.33 µm ² , an oil saturation of 81.3%, and a porosity of 18%. The average daily oil production rate per one production well is 9.5 tons, the average water cut of the produced fluid is 87.6%, the mineralization of water from the conduit is 120 g/l (example 1, tables 3, 4).

The injectivity of the injection well is 100 m ³ /day at a pressure in the conduit of 6.0 MPa. The maximum allowable pressure on the production string is 10.5 MPa.

For the injection well, according to the site development analysis, it is recommended to prepare the first slug in the amount of 100 m ³ .

The first slug is prepared immediately before injection into the reservoir through the injection well as follows.

In the shop for the preparation of chemical products, a solution of DAP with VOB is preliminarily prepared. The solution is prepared in a container with a stirrer by adding 9.989 m3 ^of fresh water, 0.001 t of DAP, and 0.01 t of DAP. To form a homogeneous solution, the DAP solution with RBM is stirred for 30 minutes. A pre-prepared solution of DAP with VOB in the amount of 10 m ³ is delivered to the well.

The first slug is prepared in an intermediate tank by supplying water (89.97 wt.%), coming from the conduit from the cluster pumping station (CPS) with a salinity of 120 g/l, to the inlet of the jet pump with simultaneous dosing of the DAF solution with RBM with a concentration of 10 wt . % dosing pump and xanthan with a concentration of 0.03 wt. % screw dispenser and mix until smooth.

The prepared first slug in the amount of 100 m ³ is pumped into the reservoir through the injection well by a pumping unit.

Then the second slug is pumped into the reservoir through the injection well in the amount of 100 m ³ .

The second slug is prepared immediately before injection into the reservoir through the injection well as follows.

In the shop for the preparation of chemical products, a solution of DAP with VOB is preliminarily prepared. The solution is prepared in a container with a stirrer by adding 9.989 m3 ^of fresh water, 0.001 t of DAP, and 0.01 t of DAP. To form a homogeneous solution, the DAP solution with RBM is stirred for 30 minutes. A pre-prepared solution of DAP with VOB in the amount of 10 m ³ is delivered to the well.

The preparation of the second slug is carried out in an intermediate tank by supplying water coming from the conduit from the cluster pumping station (CPS) with a mineralization of 120 g/l to the inlet of the jet pump. In the same container with water (89.37 wt. %), a solution of DAP with VOB with a concentration of 10 wt. % and non-ionic surfactants ethoxylated isononylphenol with a degree of ethoxylation of 12 with a concentration of 0.1 wt. % dosing pumps and mix for 10 min. Further, xanthan with a concentration of 0.03 wt. % and stirred until smooth. Next, sapropel is dosed with a screw dispenser at a concentration of 0.5 wt. % and stirred for 10 min.

The prepared second rim in the amount of 100 m ³ is pumped into the reservoir through the injection well by a pumping unit.

The first and second rims are pumped in a 1:1 volume ratio.

After completion of injection of the planned volume of the second slug (100 m ³ ), the well is stopped for technological holding for 5 days and waterflooding is resumed. The final injection pressure and the specific injectivity of the well are determined.

From Table. 5 it can be seen that after injection of a DAP solution with VOB, xanthan and water (first rim) and a mixture of VPP - xanthan, sapropel, non-ionic surfactants, a DAP solution with VOB (second rim) through the injection well into the formation, an increase in injection pressure by 42% and a decrease specific injectivity of the well by 47% (example 1, table. 5). The average additional oil production is 1750 tons per well-treatment with the ongoing technological effect, the increase in oil production is 2.5 tons / day with a decrease in the average water cut of the produced product by 2.7%.

The remaining examples of the implementation of the method of developing an oil reservoir with an injectivity of an injection well from 100 m ³ /day to 250 m ³ /day are performed similarly, their results are given in table. 3, 4 and 5.

From Table. Figure 5 shows that after the injection of the slug, the oil flow rate in the area averaged 3.7 t/day, the additional oil production averaged more than 2581 t, and the water cut decreased by an average of 3.4%.

Example 2. An area with one injection well and three production wells was chosen as an object of pilot work. The formations are represented by terrigenous reservoirs with a permeability of 0.57 µm ² , an oil saturation of 87.4%, and a porosity of 19%. The average daily oil production rate per one production well is 8.3 tons, the average water cut of the produced fluid is 96.4%, the mineralization of water from the conduit is 0.15 g/l (example 1, tables 6, 7).

The injectivity of the injection well is 251 m ³ /day at a pressure in the conduit of 10.5 MPa. The maximum allowable pressure on the production string is 14.0 MPa.

For the injection well, according to the site development analysis, it is recommended to prepare a solution of a water-soluble natural polymer - xanthan.

The xanthan solution is prepared immediately before injection into the reservoir through the injection well as follows.

The xanthan solution is prepared in an intermediate tank by supplying water (99.5 wt.%), coming from the conduit from the cluster pumping station (CPS) with a salinity of 0.15 g / l, to the inlet of the jet pump with simultaneous dosage of xanthan with a concentration of 0.03 wt. % screw dispenser and mix until smooth.

The prepared solution in a volume of 30 m ³ is pumped into the reservoir through the injection well by a pumping unit until the injection pressure is increased by 10% of the initial injection pressure.

Then the first slug is pumped into the reservoir through the injection well in the amount of 150 m ³ .

The first slug is prepared immediately before injection into the reservoir through the injection well as follows.

In the shop for the preparation of chemical products, a solution of DAP with VOB is preliminarily prepared. The solution is prepared in a container with a stirrer by adding fresh water in the amount of 14.95 m ³ , 0.02 t of DAP, and 0.03 t of DAP. To form a homogeneous solution, the DAP solution with RBM is stirred for 30 minutes. A pre-prepared solution of DAP with VOB in the amount of 10 m ³ is delivered to the well.

The first slug is prepared in an intermediate tank by supplying water (89.97 wt.%), coming from the conduit from the cluster pumping station (CPS) with a salinity of 0.15 g/l, to the inlet of the jet pump with simultaneous dosing of the DAP solution with RBM with a concentration 10 wt. % dosing pump and xanthan with a concentration of 0.03 wt. % screw dispenser and mix until smooth.

The prepared first rim in the amount of 150 m ³ is pumped into the reservoir through the injection well by a pumping unit.

Then the second slug is pumped into the formation through the injection well in the amount of 150 m ³ .

The second slug is prepared immediately before injection into the reservoir through the injection well as follows.

In the shop for the preparation of chemical products, a solution of DAP with VOB is preliminarily prepared. The solution is prepared in a container with a stirrer by adding fresh water in the amount of 14.95 m ³ , 0.02 t of DAP, and 0.03 t of DAP. To form a homogeneous solution, the DAP solution with RBM is stirred for 30 minutes. A pre-prepared solution of DAP with VOB in the amount of 10 m ³ is delivered to the well.

The preparation of the second rim is carried out in an intermediate tank by supplying water coming from the conduit from the cluster pumping station (CPS) with a mineralization of 0.15 g/l to the inlet of the jet pump. In the same container with water (89.37 wt. %), a solution of DAP VOB with a concentration of 10 wt. % and nonionic surfactants with a concentration of 0.1 wt. % dosing pumps pumps and mix for 10 minutes. Further, xanthan with a concentration of 0.03 wt. % and stirred until smooth. Next, sapropel is dosed with a screw dispenser at a concentration of 0.5 wt. % and stirred for 10 min.

The prepared second slug in the amount of 150 m ³ is pumped into the formation through the injection well by a pumping unit.

The first and second rims are pumped in a 1:1 volume ratio.

After completion of the injection of the planned volume of the second slug (150 m ³ ), the well is stopped for process holding for 6 days and waterflooding is resumed. The final injection pressure and the specific injectivity of the well are determined.

From Table. 8 shows that after injection of a solution of DAP with WWB and xanthan (the first rim) and a mixture of sapropel, nonionic surfactants. The runway and the DAP solution with VOB (second rim) through the injection well into the formation, an increase in injection pressure by 11% and a decrease in the specific injectivity of the well by 25% (example 1, table. 8). The average additional oil production is 2450 tons per well-treatment with the ongoing technological effect, the increase in oil production is 3.5 tons / day with a decrease in the average water cut of the produced product by 2.1%.

Other examples of the implementation of the method of developing an oil reservoir with an injectivity of an injection well from 251 m ³ /day and above are performed similarly, their results are shown in table. 6, 7 and 8.

From Table. Figure 8 shows that after the injection of the slug, the oil flow rate in the area averaged 3.2 t/day, the additional oil production averaged more than 2265 t, and the water cut decreased by an average of 3.4%.

Thus, the proposed method for the development of a heterogeneous oil reservoir makes it possible to increase the oil recovery of production wells by changing and leveling filtration flows in heterogeneous reservoirs by increasing the efficiency of microbiological treatment, reducing the permeability of high-permeability zones of the reservoir, involving oil-saturated, previously unexplored low-permeability interlayers in the development and increasing the coverage of the reservoir by the impact, and also allows you to expand the technological possibilities of the implementation of the method.

Table 3 Research results

Injection section number. wells Acceptance will inflate. wells at water line pressure before injection, m ³ / day / MPa The first slug, wt. % The second fringe, wt. % DAP solution with VOB Xanthan Water / mineralization, g/l DAP solution with VOB Xanthan nonionic surfactants Sapropel Water / mineralization, g/l one 2 3 4 5 6 7 eight nine ten one 100 / 6.0 ten 0.03 89.97 / 120 ten 0.03 0.1 0.5 89.37 / 120 2 175/9.0 12 0.03 87.97 / 200 12 0.03 0.1 0.5 87.37 / 200 3 250/7.5 fifteen 0.03 84.97 / 120 fifteen 0.03 0.1 0.5 84.37 / 120 4 250 / 11.5 ten 0.3 89.7 / 0.15 ten 0.03 0.1 0.5 89.37 / 0.15 5 100 / 10.5 12 0.3 87.7 / 200 12 0.03 0.1 0.5 87.37 / 200 6 175 / 6.0 fifteen 0.3 84.7 / 120 fifteen 0.03 0.1 0.5 84.37 / 120 7 175/7.5 ten 0.5 89.5 / 120 ten 0.03 0.1 0.5 89.37 / 120 eight 250 / 9.0 12 0.5 87.5 / 200 12 0.03 0.1 0.5 87.37 / 200 nine 100 / 11.5 fifteen 0.5 84.5 / 0.15 fifteen 0.03 0.1 0.5 84.37 / 0.15 ten 250 / 6.0 ten 0.03 89.97 / 200 ten 0.3 0.1 0.5 89.1 / 200 eleven 100 / 10.5 12 0.03 87.97 / 0.15 12 0.3 0.1 0.5 87.1 / 0.15 12 175/10.5 fifteen 0.03 84.97 / 120 fifteen 0.3 0.1 0.5 84.1 / 120 thirteen 175 / 11.5 ten 0.03 89.97 / 200 ten 0.5 0.1 0.5 88.9 / 200 fourteen 250 / 11.5 12 0.03 87.97 / 120 12 0.5 0.1 0.5 86.9 / 120 fifteen 100 / 5.5 fifteen 0.03 84.97 / 200 fifteen 0.5 0.1 0.5 83.9 / 200 sixteen 100 / 9.5 ten 0.3 89.7 / 0.15 ten 0.3 0.1 0.5 89.1 / 0.15 17 175/8.5 12 0.3 87.7 / 0.15 12 0.3 0.1 0.5 87.1 / 0.15 eighteen 250 / 10.5 fifteen 0.3 84.7 / 120 fifteen 0.3 0.1 0.5 84.1 / 120 nineteen 250/7.5 ten 0.5 89.5 / 200 ten 0.3 0.1 0.5 89.1 / 200 20 100 / 6.5 12 0.5 87.5 / 120 12 0.3 0.1 0.5 87.1 / 120 21 175 / 9.5 fifteen 0.5 84.5 / 0.15 fifteen 0.3 0.1 0.5 84.1 / 0.15 22 250 / 10.5 ten 0.03 89.97 / 200 ten 0.03 0.3 0.5 89.17 / 200 23 175 / 9.5 12 0.03 87.97 / 0.15 12 0.03 0.3 0.5 87.17 / 0.15 24 100 / 8.5 fifteen 0.03 84.97 / 0.15 fifteen 0.03 0.3 0.5 84.17 / 0.15 25 175 / 9.5 ten 0.3 89.7 / 120 ten 0.03 0.3 0.5 89.17 / 120 26 250 / 10.5 12 0.3 87.7 / 200 12 0.03 0.3 0.5 87.17 / 200 27 100 / 12.8 fifteen 0.3 84.7 / 200 fifteen 0.03 0.3 0.5 84.17 / 200 28 100 / 10.5 ten 0.5 89.5 / 120 ten 0.03 0.3 0.5 89.17 / 120

Table 3 continued

one 2 3 4 5 6 7 eight nine ten 29 175 / 12.5 12 0.5 87.5 / 0.15 12 0.03 0.3 0.5 87.17 / 0.15 thirty 250 / 10.5 fifteen 0.5 84.5 / 0.15 fifteen 0.03 0.3 0.5 84.17 / 0.15 31 100 / 6.5 ten 0.3 89.7 / 200 ten 0.5 0.3 0.5 88.7 / 200 32 250/7.5 12 0.3 87.7 / 120 12 0.5 0.3 0.5 86.7 / 120 33 175 / 11.5 fifteen 0.3 84.7 / 120 fifteen 0.5 0.3 0.5 83.7 / 120 34 175 / 11.5 ten 0.5 89.5 / 200 ten 0.3 0.3 0.5 88.9 / 200 35 250 / 6.0 12 0.5 87.5 / 120 12 0.3 0.3 0.5 86.9 / 120 36 100 / 8.5 fifteen 0.5 84.5 / 120 fifteen 0.3 0.3 0.5 83.9 / 120 37 100 / 10.5 ten 0.03 89.97 / 0.15 ten 0.03 0.5 0.5 88.97 / 0.15 38 175/9.0 12 0.03 87.97 / 200 12 0.03 0.5 0.5 86.97 / 200 39 250/8.5 fifteen 0.03 84.97 / 200 fifteen 0.03 0.5 0.5 83.97 / 200 40 175/8.0 ten 0.3 89.7 / 120 ten 0.03 0.5 0.5 88.97 / 120 41 100 / 12.0 12 0.3 87.7 / 200 12 0.03 0.5 0.5 86.97 / 200 42 250/9.5 fifteen 0.3 84.7 / 200 fifteen 0.03 0.5 0.5 83.97 / 200 43 250/8.0 ten 0.5 89.5 / 0.15 ten 0.03 0.5 0.5 88.97 / 0.15 44 100 / 7.0 12 0.5 87.5 / 0.15 12 0.03 0.5 0.5 86.97 / 0.15 45 175/7.5 fifteen 0.5 84.5 / 120 fifteen 0.03 0.5 0.5 83.97 / 120 46 250 / 9.0 ten 0.3 89.7 / 0.15 ten 0.5 0.5 0.5 88.5 / 0.15 47 175/10.5 12 0.3 87.7 / 0.15 12 0.5 0.5 0.5 86.5 / 0.15 48 100 / 11.5 fifteen 0.3 84.7 / 200 fifteen 0.5 0.5 0.5 83.5 / 200 49 100 / 7.5 ten 0.5 89.5 / 200 ten 0.3 0.5 0.5 88.7 / 200 fifty 175 / 12.5 12 0.5 87.5 / 0.15 12 0.3 0.5 0.5 86.7 / 0.15 51 250 / 10.5 fifteen 0.5 84.5 / 120 fifteen 0.3 0.5 0.5 83.7 / 120 52 175/8.5 ten 0.3 89.7 / 0.15 ten 0.5 0.3 1.5 87.7 / 0.15 53 250/7.5 12 0.3 87.7 / 200 12 0.5 0.3 1.5 85.7 / 200 54 100 / 11.5 fifteen 0.3 84.7 / 120 fifteen 0.5 0.3 1.5 82.7 / 120 55 175/10.5 ten 0.5 89.5 / 200 ten 0.03 0.3 1.5 88.17 / 200 56 250/7.5 12 0.5 87.5 / 0.15 12 0.03 0.3 1.5 86.17 / 0.15 57 100 / 11.5 fifteen 0.5 84.5 / 0.15 fifteen 0.03 0.3 1.5 83.17 / 0.15 58 100 / 5.5 ten 0.3 89.7 / 120 ten 0.5 0.5 1.5 87.5 / 120 59 175/8.5 12 0.3 87.7 / 120 12 0.5 0.5 1.5 85.5 / 120

Table 3 continued

one 2 3 4 5 6 7 eight nine ten 60 250 / 9.0 fifteen 0.3 250 / 9.0 fifteen 0.5 0.5 1.5 82.5 / .015 61 250 / 10.5 ten 0.5 250 / 11.5 ten 0.3 0.5 1.5 87.7 / 200 62 175/10.5 12 0.5 175/10.5 12 0.3 0.5 1.5 85.7 / 200 63 100 / 6.5 fifteen 0.5 100 / 6.5 fifteen 0.3 0.5 1.5 82.7 / 200 64 250 / 11.5 ten 0.3 250 / 11.5 ten 0.03 0.1 2.5 87.37 / 120 65 175/9.0 12 0.3 175/9.0 12 0.03 0.1 2.5 85.37 / 0.15 66 100 / 8.5 fifteen 0.3 100 / 8.5 fifteen 0.03 0.1 2.5 82.37 / 200 67 100 / 6.0 ten 0.5 100 / 6.0 ten 0.3 0.3 2.5 84.9 / 120 68 175/10.5 12 0.5 87.5 / 120 12 0.3 0.3 2.5 81.9 / 200 69 250/8.5 fifteen 0.5 84.5 / 200 fifteen 0.3 0.3 2.5 86.5 / 0.15 70 250 / 11.5 ten 0.03 89.97 / 0.15 ten 0.5 0.5 2.5 84.5 / 120 71 100 / 9.5 12 0.03 87.97 / 120 12 0.5 0.5 2.5 81.5 / 200 72 175/7.5 fifteen 0.03 84.97 / 200 fifteen 0.5 0.5 2.5 84.9 / 120

Table 4 Research results

Plot number will inflate. wells Acceptance will inflate. wells at water line pressure, m ³ / day / MPa Maximum allowable pressure on the production string and reservoirs, MPa Porosity, fractions of units The volume of the first slug, m ³ The volume of the second slug, m ³ Volume ratio of the first fringe to the second fringe Well shut-in for process holding, days Before download After download one 2 3 4 5 6 7 eight nine one 100 / 6.0 75/8.5 10.5 0.18 100 100 1:1 5 2 175/9.0 130 / 10.5 13.5 0.21 175 175 1:1 eight 3 250/7.5 210/9.5 11.6 0.20 250 250 1:1 ten 4 250 / 11.5 210 / 13.5 16.0 0.23 150 150 1:1 7 5 100 / 10.5 70/12.1 14.5 0.17 200 200 1:1 nine 6 175 / 6.0 140/7.5 11.8 0.24 200 200 1:1 eight 7 175/7.5 130 / 9.5 14.3 0.21 100 100 1:1 5 eight 250 / 9.0 210/11.2 15.0 0.20 175 175 1:1 6 nine 100 / 11.5 70 / 13.0 16.0 0.22 250 250 1:1 7 ten 250 / 6.0 210 / 7.9 10.5 0.18 100 100 1:1 ten eleven 100 / 10.5 70/11.5 13.5 0.23 150 150 1:1 eight 12 175/10.5 140 / 13.0 15.5 0.24 250 250 1:1 6 thirteen 175 / 11.5 140 / 13.5 16.0 0.23 150 150 1:1 7 fourteen 250 / 11.5 215/13.0 16.0 0.22 200 200 1:1 5 fifteen 100 / 5.5 75/7.5 9.0 0.22 175 175 1:1 nine sixteen 100 / 9.5 70/11.0 13.5 0.23 100 100 1:1 ten 17 175/8.5 140 / 10.5 13.5 0.19 150 150 1:1 nine eighteen 250 / 10.5 210 / 12.0 14.0 0.20 150 150 1:1 7 nineteen 250/7.5 200 / 9.4 11.0 0.21 175 175 1:1 ten 20 100 / 6.5 75/8.5 10.0 0.22 175 175 1:1 eight 21 175/9.5 140/11.5 13.5 0.22 250 250 1:1 ten 22 250 / 10.5 210 / 12.0 14.5 0.18 200 200 1:1 5 23 175 / 9.5 140 / 10.5 13.0 0.25 200 200 1:1 7 24 100 / 8.5 70 / 10.0 13.2 0.23 150 150 1:1 ten 25 175 / 9.5 140 / 11.5 14.0 0.19 150 150 1:1 6 26 250 / 10.5 210/12.1 14.5 0.21 175 175 1:1 7 27 100 / 12.8 70/14.0 16.5 0.25 100 100 1:1 eight

Table 4 continued

one 2 3 4 5 6 7 eight nine 28 100 / 10.5 75/13.0 16.0 0.20 175 175 1:1 nine 29 175 / 12.5 140 / 14.0 16.5 0.22 175 175 1:1 6 thirty 250 / 10.5 210/12.6 15.0 0.19 175 175 1:1 5 31 100 / 6.5 70 / 9.0 11.0 0.17 200 200 1:1 5 32 250/7.5 210 / 10.5 14.0 0.25 100 100 1:1 6 33 175/11.5 140 / 13.2 15.5 0.22 150 150 1:1 ten 34 175 / 11.5 140 / 13.5 16.0 0.23 175 175 1:1 eight 35 250 / 6.0 210/8.3 10.5 0.24 150 150 1:1 5 36 100 / 8.5 70/11.5 13.5 0.18 175 175 1:1 ten 37 100 / 10.5 70/12.2 14.3 0.19 250 250 1:1 ten 38 175/9.0 140 / 11.0 13.5 0.20 100 100 1:1 5 39 250/8.5 210/10.5 13.5 0.25 250 250 1:1 eight 40 175/8.0 140 / 10.5 14.0 0.24 175 175 1:1 6 41 100 / 12.0 70/14.0 16.5 0.19 100 100 1:1 7 42 250 / 9.5 210/10.7 12.6 0.21 150 150 1:1 nine 43 250/8.0 210 / 11.0 15.0 0.22 200 200 1:1 5 44 100 / 7.0 75 / 9.0 13.3 0.23 150 150 1:1 eight 45 175/7.5 140 / 10.0 12.0 0.18 200 200 1:1 7 46 250 / 9.0 210 / 11.0 13.5 0.03 150 150 1:1 7 47 175/10.5 140 / 12.1 14.2 0.22 100 100 1:1 nine 48 100 / 11.5 70/13.0 15.0 0.21 250 250 1:1 eight 49 100 / 7.5 70 / 10.0 14.0 0.19 200 200 1:1 5 fifty 175 / 12.5 140 / 14.0 16.5 0.20 250 250 1:1 6 51 250 / 10.5 200 / 12.3 14.5 0.21 175 175 1:1 7 52 175/8.5 140 / 10.5 13.5 0.19 100 100 1:1 nine 53 250/7.5 210/9.5 11.5 0.23 250 250 1:1 eight 54 100 / 11.5 70/13.2 15.5 0.23 100 100 1:1 5 55 175/10.5 140 / 12.0 14.5 0.22 150 150 1:1 ten 56 250/7.5 200 / 10.0 14.3 0.21 200 200 1:1 7 57 100 / 11.5 70 / 13.5 16.0 0.19 175 175 1:1 7 58 100 / 5.5 70 / 7.0 9.0 0.17 200 200 1:1 5

Table 4 continued

one 2 3 4 5 6 7 eight nine 59 175/8.5 140 / 11.0 13.0 0.22 100 100 1:1 6 60 250 / 9.0 210/11.5 14.0 0.21 250 250 1:1 7 61 250 / 10.5 210 / 12.5 15.0 0.24 200 200 1:1 ten 62 175/10.5 140 / 12.3 14.5 0.19 100 100 1:1 5 63 100 / 6.5 70 / 9.0 11.0 0.21 200 200 1:1 eight 64 250 / 11.5 210/13.6 16.0 0.23 150 150 1:1 ten 65 175/9.0 140 / 11.5 13.5 0.22 175 175 1:1 5 66 100 / 8.5 70 / 10.0 15.0 0.22 100 100 1:1 5 67 100 / 6.0 75 / 8.0 11.0 0.20 150 150 1:1 nine 68 175/10.5 140 / 12.8 15.0 0.19 200 200 1:1 7 69 250/8.5 200 / 11.0 14.0 0.24 250 250 1:1 6 70 250 / 11.5 210/13.6 16.0 0.23 100 100 1:1 nine 71 100 / 9.5 70 / 12.5 15.5 0.23 175 175 1:1 eight 72 175/7.5 140 / 10.0 12.0 0.22 175 175 1:1 ten Note - The numbers of injection well sections correspond to the numbers of injection well sections indicated in Table 3.

Table 5 Research results

The plot number will inflate. wells Specific injectivity will inflate. wells, m ³ / day / MPa Injection pressure, MPa Average oil production rate for the area, t/day Average water cut in the area, % before injection after download change, % before injection after download change, % before injection after download growth before injection after download decline one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen one 17 nine 47 6.0 8.5 42 9.5 12.0 +2.5 87.6 84.9 2.7 2 nineteen 12 37 9.0 10.5 17 6.4 9.4 +3.0 90.8 88.6 2.2 3 33 22 33 7.5 9.5 27 5.9 9.2 +3.3 95.3 92.4 2.9 4 22 sixteen 27 11.5 13.5 17 12.3 15.8 +3.5 78.6 75.9 2.7 5 ten 6 40 10.5 12.1 fifteen 13.4 16.2 +2.8 96.4 93.2 3.2 6 29 nineteen 34 6.0 7.5 25 15.7 18.4 +2.7 89.1 85.0 4.1 7 23 fourteen 39 7.5 9.5 27 13.2 17.6 +4.4 90.3 87.1 3.2 eight 28 nineteen 32 9.0 11.2 24 12.0 15.7 +3.7 88.2 85.7 2.5 nine nine 5 44 11.5 13.0 thirteen 15.0 18.3 +3.3 95.2 92.4 2.8 ten 42 27 36 6.0 7.9 32 9.0 12.0 +3.0 90.1 86.6 3.5 eleven ten 6 40 10.5 11.5 ten 24.6 27.8 +3.2 94.3 91.8 2.5 12 17 eleven 35 10.5 13.0 24 12.7 15.8 +3.1 92.3 89.4 2.9 thirteen fifteen ten 33 11.5 13.5 17 15.4 19.3 +3.9 78.9 75.1 3.8 fourteen 22 17 23 11.5 13.0 thirteen 10.5 13.0 +2.5 89.7 86.0 3.7 fifteen eighteen ten 44 5.5 7.5 36 23.2 26.1 +2.9 89.3 87.1 2.2 sixteen eleven 6 45 9.5 11.0 sixteen 15.4 18.3 +2.9 87.5 84.9 2.6 17 21 thirteen 38 8.5 10.5 24 14.3 18.6 +4.3 89.7 86.7 3.0 eighteen 24 eighteen 25 10.5 12.0 fourteen 12.5 16.5 +4.0 91.5 88.4 3.1 nineteen 33 21 36 7.5 9.4 25 9.5 13.8 +4.3 95.0 92.1 2.9 20 fifteen nine 40 6.5 8.5 31 10.2 14.7 +4.5 94.8 92.0 2.8 21 eighteen 12 33 9.5 11.5 21 7.9 11.9 +4.0 90.8 87.9 2.9 22 24 eighteen 25 10.5 12.0 fourteen 11.7 14.3 +2.6 93.1 90.4 2.7 23 eighteen thirteen 28 9.5 10.5 eleven 12.6 14.9 +2.3 92.8 90.1 2.7 24 12 7 42 8.5 10.0 eighteen 19.5 22.4 +2.9 90.1 87.9 2.2 25 eighteen 12 33 9.5 11.5 21 6.8 11.2 +4.4 89.7 87.2 2.5 26 24 17 29 10.5 12.1 fifteen 9.6 12.6 +3.0 90.8 88.1 2.7 27 eight 5 38 12.8 14.0 nine 8.7 11.9 +3.2 96.1 93.2 2.9

Table 5 continued

one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen 28 ten 6 40 10.5 13.0 24 10.8 13.9 +3.1 92.0 89.5 2.5 29 fourteen ten 29 12.5 14.0 12 9.7 13.4 +3.7 90.4 86.9 3.5 thirty 24 17 29 10.5 12.6 20 11.3 14.9 +3.6 94.6 90.4 4.2 31 fifteen eight 47 6.5 9.0 38 11.8 16.2 +4.4 96.7 93.3 3.4 32 33 20 39 7.5 10.5 40 15.4 19.4 +4.0 91.5 87.6 3.9 33 fifteen eleven 27 11.5 13.2 fifteen 10.2 14.6 +4.4 90.8 87.6 3.2 34 fifteen ten 33 11.5 13.5 17 14.3 18.2 +3.9 93.1 90.1 3.0 35 42 25 40 6.0 8.3 38 19.4 23.5 +4.1 87.2 83.7 3.5 36 12 6 fifty 8.5 11.5 35 7.5 10.6 +3.1 92.5 88.7 3.8 37 ten 6 40 10.5 12.2 sixteen 8.2 11.6 +3.4 89.4 86.1 3.3 38 nineteen thirteen 32 9.0 11.0 22 5.8 8.4 +2.6 91.7 88.3 3.4 39 29 20 31 8.5 10.5 24 11.7 14.3 +2.6 96.3 92.7 3.6 40 22 thirteen 41 8.0 10.5 31 12.6 16.5 +3.9 92.5 89.7 2.8 41 eight 5 38 12.0 14.0 17 12.1 15.9 +3.8 95.6 92.5 3.1 42 26 20 23 9.5 10.7 thirteen 11.3 15.4 +4.1 91.5 87.9 3.6 43 31 nineteen 39 8.0 11.0 38 25.3 29.4 +4.1 90.7 87.5 3.2 44 fourteen eight 43 7.0 9.0 29 10.1 13.5 +3.4 78.3 75.0 3.3 45 23 fourteen 39 7.5 10.0 33 9.7 13.4 +3.7 81.6 78.6 3.0 46 28 nineteen 32 9.0 11.0 22 8.2 11.9 +3.7 94.3 91.4 2.9 47 17 12 29 10.5 12.1 fifteen 10.8 14.3 +3.5 89.0 85.7 3.3 48 nine 5 44 11.5 13.0 thirteen 6.5 9.6 +3.1 96.5 92.4 4.1 49 thirteen 7 46 7.5 10.0 33 12.5 15.9 +3.4 97.1 93.2 3.9 fifty fourteen ten 29 12.5 14.0 12 13.8 17.0 +3.2 94.9 90.5 4.4 51 24 sixteen 33 10.5 12.3 17 8.2 12.6 +4.4 90.3 86.5 3.8 52 21 thirteen 38 8.5 10.5 24 12.4 15.7 +3.3 89.3 85.9 3.4 53 33 22 33 7.5 9.5 27 17.8 21.4 +3.6 90.2 86.5 3.7 54 nine 5 44 11.5 13.2 fifteen 20.4 24.3 +3.9 91.5 88.7 2.8 55 17 12 29 10.5 12.0 fourteen 6.5 9.9 +3.4 78.9 74.3 4.6 56 33 20 39 7.5 10.0 33 14.7 18.4 +3.7 96.1 92.7 3.4 57 nine 5 44 11.5 13.5 17 12.8 15.9 +3.1 93.7 89.2 4.5 58 eighteen ten 44 5.5 7.0 27 7.9 12.6 +4.7 92.8 88.5 4.3 59 21 thirteen 38 8.5 11.0 29 16.2 20.6 +4.4 90.7 87.6 3.1

Table 5 continued

one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen 60 28 eighteen 36 9.0 11.5 28 20.4 25.0 +4.6 93.4 88.9 4.5 61 24 17 29 10.5 12.5 nineteen 12.3 17.3 +5.0 97.6 93.6 4.0 62 17 eleven 35 10.5 12.3 17 10.2 15.1 +4.9 92.4 88.6 3.8 63 fifteen eight 47 6.5 9.0 38 13.4 16.5 +3.1 96.0 92.1 3.9 64 22 fifteen 32 11.5 13.6 eighteen 22.7 26.4 +3.7 92.7 89.4 3.3 65 nineteen 12 37 9.0 11.5 28 6.8 11.6 +4.8 90.7 87.6 3.1 66 12 7 42 8.5 10.0 eighteen 11.6 15.8 +4.2 94.3 89.9 4.4 67 17 nine 47 6.0 8.0 33 12.8 17.6 +4.8 92.3 88.7 3.6 68 17 eleven 35 10.5 12.8 22 13.6 18.6 +5.0 97.5 93.4 4.1 69 29 eighteen 38 8.5 11.0 29 15.2 19.5 +4.3 90.6 87.6 3.0 70 22 fifteen 32 11.5 13.6 eighteen 8.9 13.0 +4.1 95.1 92.0 3.1 71 eleven 6 45 9.5 12.5 32 10.7 15.3 +4.6 92.4 89.0 3.4 72 23 fourteen 39 7.5 10.0 33 8.6 13.5 +4.9 93.5 90.2 3.3 Note - The numbers of injection well sections correspond to the numbers of injection well sections indicated in Table 4.

Table 6 Research results

Injection section number. wells Acceptance will inflate. wells at water line pressure before injection, m ³ / day / MPa A solution of xanthan or dispersed component, wt. % The first slug, wt. % The second fringe, wt. % Xanthan Dispersed component Water / mineralization, g/l DAP solution with VOB Xanthan Water / mineralization, g/l DAP solution with VOB Xanthan nonionic surfactants Sapropel Water / mineralization, g/l one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen one 251/10.5 0.5 99.5 / 0.15 ten 0.03 89.97 / 0.15 ten 0.03 0.1 0.5 89.37 / 0.15 2 300 / 6.5 1.5 (MC) 98.5 / 200 fifteen 0.3 84.7 / 200 fifteen 0.03 0.5 1.5 82.97 / 200 3 251/11.5 0.5 (PC) 99.5 / 200 fifteen 0.3 84.7 / 200 fifteen 0.03 0.1 0.5 84.37 / 200 4 300 / 8.5 1.5 98.5 / 120 ten 0.3 89.7 / 120 ten 0.03 0.1 0.5 89.37 / 120 5 300 / 8.5 2.5 (MCC) 97.5 / 0.15 12 0.3 87.7 / 0.15 12 0.03 0.1 0.5 87.37 / 0.15 6 300 / 7.5 1.5 (MCC) 98.5 / 120 12 0.03 87.97 / 120 12 0.5 0.3 0.5 86.7 / 120 7 300 / 10.5 0.5 (MCC) 99.5 / 0.15 ten 0.3 89.7 / 0.15 ten 0.3 0.3 1.5 87.9 / 0.15 eight 300 / 7.5 2.5 97.5 / 120 fifteen 0.3 84.7 / 120 fifteen 0.3 0.5 0.5 83.7 / 120 nine 251/12.5 2.5 (MCC) 97.5 / 120 ten 0.03 89.97 / 120 ten 0.3 0.5 2.5 86.7 / 120 ten 251/9.5 0.5 (PC) 99.5 / 200 12 0.03 87.97 / 200 12 0.03 0.1 0.5 87.37 / 200 eleven 300 / 7.5 1.5 (MC) 98.5 / 120 ten 0.5 89.5 / 120 ten 0.3 0.3 1.5 87.9 / 120 12 251/9.0 1.5 (MC) 98.5 / 0.15 12 0.5 87.5 / 0.15 12 0.3 0.3 1.5 85.9 / 0.15 thirteen 300 / 10.5 2.5 (MCC) 97.5 / 200 fifteen 0.3 84.7 / 200 fifteen 0.3 0.3 1.5 82.9 / 200 fourteen 251/8.5 1.5 98.5 / 0.15 ten 0.5 89.5 / 0.15 ten 0.5 0.5 2.5 86.5 / 0.15 fifteen 300 / 8.5 1.5 (MCC) 98.5 / 200 ten 0.3 89.7 / 200 ten 0.3 0.5 0.5 88.7 / 200 sixteen 300 / 12.5 0.5 99.5 / 200 fifteen 0.03 84.97 / 200 fifteen 0.5 0.1 0.5 83.9 / 200 17 300 / 10.5 2.5 (MC) 97.5 / 120 12 0.03 87.97 / 120 12 0.5 0.3 1.5 85.7 / 120 eighteen 300 / 7.5 2.5 97.5 / 120 ten 0.3 89.7 / 120 ten 0.5 0.3 2.5 86.7 / 120 nineteen 251/9.0 2.5 (MCC) 97.5 / 200 12 0.3 87.7 / 200 12 0.3 0.5 0.5 86.7 / 200 20 300 / 7.5 0.5 (PC) 99.5 / 200 ten 0.03 89.97 / 200 ten 0.3 0.3 0.5 88.9 / 200 21 300 / 10.5 1.5 98.5 / 120 12 0.03 87.97 / 120 12 0.5 0.1 0.5 86.9 / 120 22 251/9.5 1.5 (MC) 98.5 / 200 ten 0.03 89.97 / 200 ten 0.5 0.3 1.5 87.7 / 200 23 300 / 11.5 0.5 99.5 / 200 12 0.3 87.7 / 200 12 0.3 0.3 1.5 85.9 / 200 24 251/8.5 0.5 (PC) 99.5 / 200 fifteen 0.03 84.97 / 200 fifteen 0.3 0.5 2.5 81.7 / 200 25 251/9.5 1.5 (MC) 98.5 / 0.15 12 0.03 87.97 / 0.15 12 0.3 0.5 2.5 84.7 / 0.15 26 300 / 10.5 1.5 (MCC) 98.5 / 0.15 fifteen 0.5 84.5 / 0.15 fifteen 0.5 0.5 2.5 81.5 / 0.15 27 251/10.5 0.5 (MCC) 99.5 / 200 12 0.5 87.5 / 200 12 0.5 0.5 2.5 84.5 / 200 28 300 / 9.5 1.5 (MCC) 98.5 / 0.15 fifteen 0.03 84.97 / 0.15 fifteen 0.03 0.1 0.5 84.37 / 0.15 29 300 / 8.5 2.5 (MC) 97.5 / 0.15 ten 0.03 89.97 / 0.15 ten 0.5 0.3 0.5 88.7 / 0.15

Table 6 continued

one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen thirty 300 / 6.5 2.5 (MC) 97.5 / 120 fifteen 0.03 84.97 / 120 fifteen 0.3 0.3 0.5 83.9 / 120 31 251 / 7.5 2.5 97.5 / 120 fifteen 0.5 84.5 / 120 fifteen 0.3 0.3 1.5 82.9 / 120 32 251 / 7.5 0.5 99.5 / 0.15 12 0.03 87.97 / 0.15 12 0.3 0.3 0.5 86.9 / 0.15 33 300 / 9.5 0.5 (MCC) 99.5 / 200 fifteen 0.03 84.97 / 200 fifteen 0.5 0.3 1.5 82.7 / 200 34 251/10.5 2.5 97.5 / 200 ten 0.03 89.97 / 200 ten 0.5 0.1 0.5 88.9 / 200 35 251/9.5 1.5 98.5 / 0.15 fifteen 0.03 84.97 / 0.15 fifteen 0.5 0.3 0.5 83.7 / 0.15 36 251/10.5 2.5 97.5 / 0.15 12 0.3 87.7 / 0.15 12 0.03 0.5 1.5 85.97 / 0.15

Table 7 Research results

Plot number will inflate. wells Acceptance will inflate. wells at water line pressure, m ³ / day / MPa Maximum allowable pressure on the production string and reservoirs, MPa Porosity, fractions of units Volume of xanthan solution or dispersed component, m ³ The volume of the first slug, m ³ The volume of the second slug, m ³ Volume ratio of the first fringe to the second fringe Well shut-in for process holding, days Before download After download one 2 3 4 5 6 7 eight nine ten one 251/10.5 211/11.7 14.0 0.19 thirty 150 150 1:1 6 2 300 / 6.5 270/8.5 10.5 0.22 fifty 300 300 1:1 nine 3 251/11.5 210 / 12.5 16.0 0.20 70 275 275 1:1 eight 4 300 / 8.5 220 / 10.5 15.0 0.21 100 150 150 1:1 ten 5 300 / 8.5 250 / 10.0 13.0 0.19 70 275 275 1:1 7 6 300 / 7.5 270 / 10.5 12.5 0.23 100 300 300 1:1 6 7 300 / 10.5 270/11.5 14.0 0.21 thirty 300 300 1:1 5 eight 300 / 7.5 250 / 11.0 13.5 0.20 fifty 250 250 1:1 nine nine 251/12.5 215 / 13.5 16.0 0.21 100 150 150 1:1 ten ten 251/9.5 211/11.5 14.5 0.19 fifty 175 175 1:1 6 eleven 300 / 7.5 250 / 9.5 12.0 0.19 fifty 200 200 1:1 nine 12 251/9.0 211/11.5 14.0 0.20 100 300 300 1:1 eight thirteen 300 / 10.5 270 / 12.5 16.0 0.23 70 150 150 1:1 ten fourteen 251/8.5 215 / 10.5 13.5 0.22 fifty 250 250 1:1 5 fifteen 300 / 8.5 240/11.5 14.0 0.21 100 275 275 1:1 7 sixteen 300 / 12.5 250 / 13.6 16.0 0.20 thirty 150 150 1:1 nine 17 300 / 10.5 270/12.8 15.0 0.22 thirty 300 300 1:1 6 eighteen 300 / 7.5 240/10.5 13.5 0.19 fifty 150 150 1:1 ten nineteen 251/9.0 211/11.5 14.0 0.21 70 200 200 1:1 ten 20 300 / 7.5 270 / 9.9 12.0 0.23 100 250 250 1:1 eight 21 300 / 10.5 270 / 12.0 14.5 0.19 thirty 150 150 1:1 6 22 251/9.5 215/11.5 14.5 0.21 thirty 300 300 1:1 5 23 300 / 11.5 250 / 12.5 15.0 0.23 fifty 175 175 1:1 7 24 251/8.5 211/10.5 14.5 0.17 100 275 275 1:1 nine 25 251/9.5 215/11.9 14.0 0.22 fifty 300 300 1:1 ten 26 300 / 10.5 250 / 12.3 14.5 0.23 fifty 275 275 1:1 5 27 251/10.5 211/12.5 15.0 0.23 100 250 250 1:1 5 28 300 / 9.5 240/11.5 14.0 0.21 thirty 200 200 1:1 ten 29 300 / 8.5 270/10.6 13.5 0.19 fifty 250 250 1:1 eight thirty 300 / 6.5 250/8.0 10.5 0.21 70 300 300 1:1 6 31 251 / 7.5 215 / 9.5 14.0 0.23 100 250 250 1:1 5

Table 7 continued

one 2 3 4 5 6 7 eight nine ten 32 251 / 7.5 211/10.5 12.5 0.22 fifty 175 175 1:1 7 33 300 / 9.5 250 / 11.9 15.0 0.19 75 150 150 1:1 ten 34 251/10.5 211/12.3 14.5 0.23 thirty 275 275 1:1 eight 35 251/9.5 215/11.1 13.0 0.23 100 300 300 1:1 ten 36 251/10.5 211 / 13.0 15.5 0.23 70 175 175 1:1 nine Note - The numbers of injection well sections correspond to the numbers of injection well sections indicated in Table 6.

Table 8 Research results

The plot number will inflate. wells Specific injectivity will inflate. wells, m ³ / day / MPa Injection pressure, MPa Average oil production rate for the area, t/day Average water cut in the area, % before injection after download change, % before injection after download change, % before injection after download growth before injection after download decline one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen one 24 eighteen 25 10.5 11.7 eleven 8.3 11.8 +3.5 96.4 94.3 2.1 2 46 32 31 6.5 8.5 31 18.4 22.3 +3.9 91.2 87.9 3.3 3 22 17 23 11.5 12.5 nine 15.0 18.6 +3.6 85.3 83.1 2.2 4 35 21 41 8.5 10.5 24 16.1 19.6 +3.5 82.6 79.4 3.2 5 35 25 29 8.5 10.0 eighteen 17.4 21.5 +4.1 79.3 76.0 3.3 6 40 26 36 7.5 10.5 40 10.5 14.5 +4.0 95.6 91.6 4.0 7 29 23 eighteen 10.5 11.5 ten 8.5 12.5 +4.0 91.4 89.1 2.3 eight 40 23 43 7.5 11.0 47 9.3 13.2 +3.9 88.7 85.1 3.6 nine 20 sixteen 21 12.5 13.5 eight 6.2 9.5 +3.3 88.1 85.7 2.4 ten 26 eighteen 31 9.5 11.5 21 11.3 13.8 +2.5 95.3 91.6 3.7 eleven 40 26 34 7.5 9.5 27 15.1 17.9 +2.8 90.5 86.9 3.6 12 28 eighteen 34 9.0 11.5 28 8.7 11.3 +2.6 76.9 72.6 4.3 thirteen 29 22 24 10.5 12.5 nineteen 10.6 13.2 +2.6 93.5 90.0 3.5 fourteen thirty 20 31 8.5 10.5 24 8.6 12.6 +4.0 89.3 86.4 2.9 fifteen 35 21 41 8.5 11.5 35 18.0 21.3 +3.3 92.5 88.7 3.8 sixteen 24 eighteen 23 12.5 13.6 nine 11.4 14.6 +3.2 93.7 89.7 4.0 17 29 21 26 10.5 12.8 22 15.7 18.3 +2.6 95.1 91.9 3.2 eighteen 40 23 43 7.5 10.5 40 16.9 19.4 +2.5 88.2 85.3 2.9 nineteen 28 eighteen 34 9.0 11.5 28 10.3 14.1 +3.8 89.4 87.4 2.0 20 40 27 32 7.5 9.9 32 18.4 21.3 +2.9 92.6 90.1 2.5 21 29 23 21 10.5 12.0 fourteen 9.0 11.7 +2.7 96.1 93.9 2.2 22 26 nineteen 29 9.5 11.5 21 12.4 15.3 +2.9 94.3 91.5 2.8 23 26 20 23 11.5 12.5 nine 11.6 14.9 +3.3 89.0 84.8 4.2 24 thirty 20 32 8.5 10.5 24 8.7 12.4 +3.7 90.7 87.3 3.4 25 26 eighteen 32 9.5 11.9 25 17.4 20.1 +2.7 96.1 92.2 3.9 26 29 20 29 10.5 12.3 17 12.8 16.3 +3.5 94.9 92.4 2.5 27 24 17 29 10.5 12.5 nineteen 11.5 14.8 +3.3 93.7 90.9 2.8 28 32 21 34 9.5 11.5 21 9.8 12.8 +3.0 90.8 88.7 2.1

Table 8

one 2 3 4 5 6 7 eight nine ten eleven 12 thirteen 29 35 25 28 8.5 10.6 25 10.8 15.1 +4.3 93.1 90.5 2.6 thirty 46 31 32 6.5 8.0 23 12.2 14.7 +2.5 89.1 86.8 2.3 31 33 23 32 7.5 9.5 27 15.7 18.9 +3.2 90.0 87.8 2.2 32 33 20 40 7.5 10.5 40 22.9 25.4 +2.5 91.5 89.3 2.2 33 32 21 33 9.5 11.9 25 21.3 24.3 +3.0 78.5 74.2 4.3 34 24 17 28 10.5 12.3 17 12.5 15.6 +3.1 95.2 91.2 4.0 35 26 nineteen 27 9.5 11.1 17 20.8 24.0 +3.2 89.6 85.8 3.8 36 24 sixteen 32 10.5 13.0 24 11.6 14.6 +3.0 89.2 85.5 3.7 Note - The numbers of injection well sections correspond to the numbers of injection well sections indicated in Table 7.

Claims (12)

1. A method for developing a heterogeneous oil reservoir, including sequential injection into an injection well of a mixture of a water-soluble natural polymer - WFP - xanthan, fermentation bacteria - sapropel, water and a solution of diammonium phosphate - DAF with hydrocarbon-oxidizing bacteria - VOB and technological exposure, characterized in that the injectivity is preliminarily determined injection well, with injection well injectivity from 100 to 250 m ³ /day, the indicated solution and mixture are injected into the reservoir by rims, and in the first rim, a DAP solution with VOB is pumped, which additionally contains xanthane and water, in the following ratio of components, wt.% : DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 Water rest, and the second rim is pumped with a mixture of VPP - xanthan, sapropel and water, which additionally contains a solution of DAF with RBW and a nonionic surfactant - non-ionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, in the following ratio of the mixture components, wt. %: DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 nonionic surfactants 0.1-0.5 Sapropel 0.5-2.5 Water rest, at the same time, the said first and second rims are pumped in a volume ratio of 1:1, after injection of the said rims, the well is stopped for a technological holding lasting 5-10 days and waterflooding is resumed, with an injection well injectivity of 251 m ³ /day and higher, the mixture of the runway is first injected – xanthan or dispersed component and water, with the following ratio of components, wt.%: Xanthan or dispersed component 0.5-2.5 Water rest, injection of this mixture is carried out until the injection pressure is increased by 10-50% of the initial injection pressure, then a DAP solution with VOB and a mixture of VPP - xanthan and fermentative bacteria are pumped into the reservoir, while the injection is carried out in rims, in the first rim the DAP solution with VOB is pumped, which additionally contains xanthan and water, in the following ratio of the components of the mixture, wt.%: DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 Water rest, in the second slug, a mixture of VPP - xanthan, sapropel, water and a solution of DAP with RBW, which additionally contains a nonionic surfactant - nonionic surfactant - ethoxylated isononylphenol with a degree of oxyethylation of 12, is pumped in at the following ratio of the mixture components, wt.%: DAP solution with VOB 10.0-15.0 Xanthan 0.03-0.5 nonionic surfactants 0.1-0.5 Sapropel 0.5-2.5 Water rest, at the same time, said first and second rims are injected in a volume ratio of 1:1, after injection of said rims, the well is stopped for a technological exposure lasting 5-10 days and waterflooding is resumed. 2. The method according to p. 1, characterized in that powdered cellulose or technical microcrystalline cellulose is used as a dispersed component.