CN113088270A - Authigenic fiber water shutoff profile control composition for oil and gas reservoir - Google Patents
Authigenic fiber water shutoff profile control composition for oil and gas reservoir Download PDFInfo
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- CN113088270A CN113088270A CN202110358229.2A CN202110358229A CN113088270A CN 113088270 A CN113088270 A CN 113088270A CN 202110358229 A CN202110358229 A CN 202110358229A CN 113088270 A CN113088270 A CN 113088270A
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/5083—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
Abstract
The invention discloses a self-generated fiber water shutoff and profile control composition for an oil-gas layer, which consists of an oil phase, a water phase, a cross-linking agent and an initiator, wherein the oil phase is white oil, the water phase is carboxymethyl cellulose, polypropylene fiber, polyacrylamide, ethyl acetate, silicon dioxide, diethanolamide, octadecylamine, polyvinyl butyral, polyvinyl ether, silane and water, the cross-linking agent is phenolic resin, and the initiator is ammonium persulfate. The invention has good water shutoff and profile control effects, high adhesion degree with the stratum and water shutoff and ventilation functions.
Description
Technical Field
The invention belongs to the technical field of oilfield development, and relates to a self-generated fiber water shutoff profile control composition for an oil-gas layer.
Background
Oil well produced water is ubiquitous in the oil field development process. When the oil field enters a high-water-content or ultra-high-water-content exploitation period, the water flooding problem of the oil field becomes very complex, and the traditional small-radius profile control water shutoff and fixed-point water shutoff can not meet the development requirements of the oil field. Aiming at the problem of water outlet of an oil well, the water plugging methods adopted at present comprise a mechanical water plugging method and a chemical water plugging method. The mechanical profile control water shutoff method is only suitable for oil reservoirs with clear oil-water interfaces and interlayers with certain thickness among small layers. For a heterogeneous thick oil reservoir without an interlayer or an oil reservoir which carries out zonal injection or zonal fluid production unconditionally due to too small interlayer thickness, a chemical method can be used only.
The autogenous fiber is textile fiber which is made by using natural high molecular compounds such as cellulose, protein and the like as raw materials, preparing high molecular concentrated solution through chemical processing, and then spinning and post-processing. After surface modification is carried out on the polymer compounds such as cellulose, the polymer compounds can be randomly and uniformly dispersed in the mixed solution to form three-dimensional net distribution, and further the self-generated fiber for water shutoff and profile control is obtained. The fibers have the characteristics of bridging and forming a net and filling solid-phase particles with different grades, a net structure can be formed when the authigenic fibers enter the leaking layer, the flow resistance of water is increased, and the aim of leaking stoppage and improving the pressure-bearing capacity of the stratum is fulfilled by virtue of the hydration and gelation effects of the authigenic fibers and the filling effect of the unhydrated solid-phase particles.
In the prior art, a chemical method is used as a basis, and water shutoff profile control is prepared according to the characteristics of different oil fields, so that the purpose of solving the problem of water output of an oil well is achieved. For example, patent CN103911134B discloses a composite profile control and water shutoff agent, which comprises 0.5-5% by mass of pre-crosslinked particles; 0.1-0.3% by mass of polyacrylamide; 0.1-0.4% by mass of a cross-linking agent; 0.04-0.5% of regulator in percentage by mass; the balance of water, the method improves the oil production and reduces the water content; has excellent salt resistance and temperature resistance, low cost and simple preparation method. Patent CN103374342B discloses an oilfield profile control water shutoff agent, wherein the oilfield profile control water shutoff agent contains a polymerizable polymer monomer, lignosulfonate and an initiator, and the initiator is stored independently from the polymerizable polymer monomer and the lignosulfonate. In addition, various patent documents provide a preparation method of the profile control water shutoff agent, but the problems of low stratum adhesion degree and the like cannot be solved.
The inventor modifies the fiber substance through independent research and development to prepare the autogenous fiber for water shutoff profile control, and the process is simple and easy to operate. At present, no technology is available for modifying fiber substances to prepare the water shutoff profile control agent, because simple modification of fibers cannot be suitable for complex stratum environments, and the performance of the modified authigenic fibers is difficult to know. For water shutoff and profile control of oil and gas reservoirs, autogenous fibers with higher strength are needed to drive low-permeability matrixes possibly, and the water shutoff and profile control agent also has wide adaptability to different formation temperatures and mineralization degrees.
Disclosure of Invention
The invention aims to modify a fiber substance to prepare a water shutoff profile control composition which has high stratum adhesion degree and has the effects of water shutoff and ventilation of gaps of an oil-gas layer.
Based on the above purpose, the invention provides a self-generated fiber water shutoff and profile control composition for an oil-gas layer, which comprises an oil phase, a water phase, a cross-linking agent and an initiator, wherein the oil phase is white oil, the water phase is carboxymethyl cellulose, polypropylene fiber, polyacrylamide, ethyl acetate, silicon dioxide, diethanolamide, octadecylamine, polyvinyl butyral, polyvinyl ether, silane and water, the cross-linking agent is phenolic resin, and the initiator is ammonium persulfate.
The ordinary skilled in the art can easily know that the modification of the fiber is realized through the composition of a plurality of compounds in different proportions, and the authigenic fiber is prepared to realize the water shutoff profile control effect, but because the components and the internal mechanism are unknown, whether the modification effect of the combination of the plurality of compounds on the combination of the plurality of fibers can realize the water shutoff profile control effect is difficult to expect. The inventor of the invention researches through deep experiments, and according to the evaluation of comprehensive effects shown in the experiments, the composition can realize the water shutoff profile control effect, has high adhesion degree with the stratum, and has the functions of water shutoff and ventilation.
Further, in the self-generated fiber water shutoff profile control composition for the oil-gas reservoir, the oil phase comprises 50-80 parts by mass of white oil; preferably, the oil phase comprises 54-75 parts by mass of white oil.
Further, in the self-generated fiber water shutoff profile control composition for the oil and gas reservoir, the water phase comprises, by mass, 10-20 parts of carboxymethyl cellulose, 30-50 parts of polypropylene fiber, 50-90 parts of polyacrylamide, 1-5 parts of ethyl acetate, 1-5 parts of silicon dioxide, 1-2 parts of diethanolamide, 0.5-1 part of octadecylamine, 5-10 parts of polyvinyl butyral, 6-12 parts of polyvinyl ether, 1-10 parts of silane and 400-500 parts of water; preferably, the water phase comprises, by mass, 13-18 parts of carboxymethyl cellulose, 35-42 parts of polypropylene fiber, 60-70 parts of polyacrylamide, 2-3 parts of ethyl acetate, 2-3 parts of silicon dioxide, 1.2-1.5 parts of diethanolamide, 0.7-0.8 part of octadecylamine, 6-8 parts of polyvinyl butyral, 8-10 parts of polyvinyl ether, 6-8 parts of silane and 420-450 parts of water.
Further, in the self-generated fiber water shutoff profile control composition for the oil and gas reservoir, the cross-linking agent comprises 10-20 parts by mass of phenolic resin; preferably, the crosslinking agent comprises 14-16 parts by mass of phenolic resin.
Further, in the authigenic fiber water shutoff profile control composition for the oil-gas layer, the initiator comprises 0.2-0.5 part by mass of ammonium persulfate; preferably, the initiator comprises 0.3-0.4 parts of ammonium sulfate by mass.
The invention also provides a preparation method of the self-generated fiber water shutoff profile control composition for the oil-gas reservoir, which comprises the following steps:
1) mixing carboxymethyl cellulose, polypropylene fiber, polyacrylamide, ethyl acetate, silicon dioxide, diethanolamide, octadecylamine, polyvinyl butyral, polyvinyl ether and silane, stirring and crushing, and then mixing with water;
2) adjusting the pH of the solution obtained in the step 1) to 8-9 by using a sodium hydroxide solution or a hydrochloric acid solution as a pH regulator to obtain a water phase;
3) adding a cross-linking agent phenolic resin and an initiator ammonium persulfate into a water phase in sequence, controlling the temperature of the solution to be 50-70 ℃, stirring until the solution is clear, and adjusting the pH value of the obtained solution to be 8-9;
4) slowly adding the oil-phase white oil into the solution obtained in the step 3) at the temperature of 80-120 ℃, and quickly stirring for 3-5 hours.
Compared with the prior art, the self-generated fiber water shutoff profile control composition for the oil and gas reservoir has the beneficial effects or advantages that:
(I) good water shutoff profile control effect
The invention provides a self-generated fiber water shutoff profile control composition for an oil-gas layer, which selects carboxymethyl cellulose, polypropylene fiber and polyacrylamide as raw materials, after self-generated fiber is formed, the self-generated fiber has the characteristic of bridging and forming a net, when the self-generated fiber enters a leaking layer, a high-strength net structure can be formed by combining silicon ions, the flow resistance of water is increased, and better water shutoff profile control is achieved by virtue of the hydration gelation effect of the self-generated fiber and the filling effect of unhydrated solid-phase particles.
(II) high adhesion degree with stratum
The invention provides a self-generated fiber water shutoff profile control composition for an oil-gas layer, which is prepared by selecting carboxymethyl cellulose, polypropylene fiber and polyacrylamide as raw materials and applying a stirring and crushing mode for treatment, is convenient for subsequent reaction with a modified compound, is easy to adhere to a stratum due to the characteristic of high molecules, and improves the application strength of the whole water shutoff profile control.
(III) has the functions of water blocking and ventilation
The invention provides a self-generated fiber water shutoff and profile control composition for an oil-gas layer, which is prepared by selecting carboxymethyl cellulose, polypropylene fiber and polyacrylamide as raw materials, forming self-generated fibers, and then dispersing the fibers in a mixed solution in a disordered and uniform manner to form three-dimensional net distribution. Polyvinyl butyral is selected to further react with autogenous fiber, so that the final product is bonded into a membrane, and the membrane has the functions of water blocking and air permeability.
Detailed Description
The following examples are given to illustrate the technical aspects of the present invention, but the present invention is not limited to the following examples.
Example 1
The embodiment provides a preparation method of a self-generated fiber water shutoff profile control composition for an oil-gas layer, which specifically comprises the following steps:
1) 10g of carboxymethyl cellulose, 30g of polypropylene fiber, 50g of polyacrylamide, 1g of ethyl acetate, 1g of silicon dioxide, 1g of diethanolamide, 0.5g of octadecylamine, 5g of polyvinyl butyral, 6g of polyvinyl ether and 1g of silane are mixed, stirred and crushed, and then mixed with 400g of water. And after mixing until no obvious solid exists, adopting a sodium hydroxide solution or a hydrochloric acid solution as a pH regulator to regulate the pH of the solution to 8-9 to obtain a water phase.
2) Adding a cross-linking agent phenolic resin and an initiator ammonium persulfate into a water phase in sequence, controlling the temperature of the solution to be 50-70 ℃, stirring until the solution is clear, and adjusting the pH value of the completely dissolved solution to be 8-9.
3) Heating the solution obtained in the step 2) to 80 ℃, controlling the temperature of the solution to be 80-120 ℃, slowly adding 50g of oil-phase white oil into the solution, and rapidly stirring for 3-5 hours to obtain the authigenic fiber water shutoff profile control composition for the oil-gas layer.
Example 2
This example shows a preparation method of the self-generated fiber water shutoff and profile control composition for hydrocarbon reservoirs, which is the same as that in example 1, and is different from the preparation method in the ratio of each component. Specifically, the authigenic fiber water shutoff profile control composition for the oil and gas reservoir described in this embodiment comprises the following raw materials:
54g of white oil, 13g of carboxymethyl cellulose, 35g of polypropylene fiber, 60g of polyacrylamide, 2g of ethyl acetate, 2g of silicon dioxide, 1.2g of diethanolamide, 0.7g of octadecyl amine, 6g of polyvinyl butyral, 8g of polyvinyl ether, 6g of silane, 420g of water, 14g of phenolic resin and 0.3g of ammonium persulfate.
Example 3
This example shows a preparation method of the self-generated fiber water shutoff and profile control composition for hydrocarbon reservoirs, which is the same as that in example 1, and is different from the preparation method in the ratio of each component. Specifically, the authigenic fiber water shutoff profile control composition for the oil and gas reservoir described in this embodiment comprises the following raw materials:
75g of white oil, 18g of carboxymethyl cellulose, 42g of polypropylene fiber, 70g of polyacrylamide, 3g of ethyl acetate, 3g of silicon dioxide, 1.5g of diethanolamide, 0.8g of octadecyl amine, 8g of polyvinyl butyral, 10g of polyvinyl ether, 8g of silane, 450g of water, 16g of phenolic resin and 0.4g of ammonium persulfate.
Example 4
This example shows a preparation method of the self-generated fiber water shutoff and profile control composition for hydrocarbon reservoirs, which is the same as that in example 1, and is different from the preparation method in the ratio of each component. Specifically, the authigenic fiber water shutoff profile control composition for the oil and gas reservoir described in this embodiment comprises the following raw materials:
80g of white oil, 20g of carboxymethyl cellulose, 50g of polypropylene fiber, 90g of polyacrylamide, 5g of ethyl acetate, 5g of silicon dioxide, 2g of diethanolamide, 1g of octadecyl amine, 10g of polyvinyl butyral, 12g of polyvinyl ether, 10g of silane, 500g of water, 20g of phenolic resin and 0.5g of ammonium persulfate.
Example 5
(Yanghong, Liuqiang, Xiqiang, etc.. application of novel high-temperature plugging-adjusting technology in Clamayi oil field [ J ]. oil and gas geology and recovery ratio, 2012(3):108-
The embodiment provides a plugging strength test of the authigenic fiber water plugging profile control composition for the oil and gas reservoir.
The plugging capability of the authigenic fiber water plugging profile control composition for the oil and gas reservoir in the heterogeneous formation is evaluated in the embodiments 1-4 through a parallel double-tube core simulated plugging experiment. The specific operation steps are as follows:
establishing a bound water state of a sand filling pipe with the length of 8cm and the diameter of 2.5cm according to a core flow experiment method, and measuring the water phase permeability of the sand filling pipe; sequentially injecting a pre-solution, the self-generated fiber water plugging and profile control composition for the oil and gas reservoir and the displacing liquid described in the embodiments 1 to 4 at room temperature, and curing for 24 hours at 120 ℃ to fully cure the self-generated fiber water plugging and profile control composition; and finally, forward hot water driving is carried out at the speed of 0.5mL/min (the water temperature is 90 ℃), the inlet and outlet pressure and the breakthrough pressure are observed and recorded, the water phase permeability after breakthrough is calculated, the measurement data is recorded, and the result record is shown in table 1.
TABLE 1 plugging Capacity of Water plugging Profile compositions in heterogeneous formations
The data in Table 1 show that the plugging strength of the authigenic fiber water-plugging profile control composition for the oil-gas layer to cores with different permeability is more than 20MPa/m, namely, the channeling channel can be plugged by injecting a smaller water-plugging profile control composition plug, and the adhesion degree of the composition to the stratum is high. The plugging rate of each test reagent is more than 99%, and the water plugging and profile control function can be well realized, so that the water plugging and profile control reagent has a good water plugging and profile control effect.
As described above, the present invention can be preferably implemented, and the above-mentioned embodiments only describe the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various changes and modifications of the technical solution of the present invention made by those skilled in the art without departing from the design spirit of the present invention shall fall within the protection scope defined by the present invention.
Claims (10)
1. The self-generated fiber water shutoff profile control composition for the oil-gas layer is characterized by comprising an oil phase, a water phase, a cross-linking agent and an initiator, wherein the oil phase is white oil; the water phase is carboxymethyl cellulose, polypropylene fiber, polyacrylamide, ethyl acetate, silicon dioxide, diethanol amide, octadecyl amine, polyvinyl butyral, polyvinyl ether, silane and water; the cross-linking agent is phenolic resin; the initiator is ammonium persulfate.
2. The water shutoff and profile control composition according to claim 1, wherein the oil phase comprises 50-80 parts by mass of white oil.
3. The water shutoff and profile control composition according to claim 2, wherein the oil phase comprises 54-75 parts by mass of white oil.
4. The water shutoff and profile control composition according to claim 1, wherein the water phase comprises, by mass, 10 to 20 parts of carboxymethyl cellulose, 30 to 50 parts of polypropylene fiber, 50 to 90 parts of polyacrylamide, 1 to 5 parts of ethyl acetate, 1 to 5 parts of silicon dioxide, 1 to 2 parts of diethanolamide, 0.5 to 1 part of octadecylamine, 5 to 10 parts of polyvinyl butyral, 6 to 12 parts of polyvinyl ether, 1 to 10 parts of silane, and 400 to 500 parts of water.
5. The water shutoff and profile control composition according to claim 4, wherein the water phase comprises, by mass, 13-18 parts of carboxymethyl cellulose, 35-42 parts of polypropylene fiber, 60-70 parts of polyacrylamide, 2-3 parts of ethyl acetate, 2-3 parts of silicon dioxide, 1.2-1.5 parts of diethanolamide, 0.7-0.8 part of octadecylamine, 6-8 parts of polyvinyl butyral, 8-10 parts of polyvinyl ether, 6-8 parts of silane and 420-450 parts of water.
6. The water shutoff and profile control composition according to claim 1, wherein the cross-linking agent comprises 10-20 parts by mass of phenolic resin.
7. The water shutoff and profile control composition according to claim 6, wherein the cross-linking agent comprises 14-16 parts by mass of phenolic resin.
8. The water shutoff and profile control composition according to claim 1, wherein the initiator comprises 0.2-0.5 parts by mass of ammonium persulfate.
9. The water shutoff and profile control composition according to claim 8, wherein the initiator comprises 0.3-0.4 parts by mass of ammonium persulfate.
10. Use of a water plugging and profile control composition according to any one of claims 1 to 9 in oil field water plugging and profile control.
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| CN101020816A (en) * | 2007-02-12 | 2007-08-22 | 中国石化集团河南石油勘探局 | High temperature profile control agent |
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| CN103265934A (en) * | 2013-05-02 | 2013-08-28 | 中国石油天然气股份有限公司 | Profile control agent for water injection well, and preparation method and application thereof |
| WO2014139037A1 (en) * | 2013-03-15 | 2014-09-18 | University Of New Brunswick | Self-assembling polymer compositions for use in subterranean oil recovery |
| CN107501485A (en) * | 2017-08-21 | 2017-12-22 | 中国石油大学(北京) | A kind of oil field profile-controlling and plugging agent and preparation method thereof |
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2021
- 2021-04-01 CN CN202110358229.2A patent/CN113088270A/en active Pending
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| CN101020816A (en) * | 2007-02-12 | 2007-08-22 | 中国石化集团河南石油勘探局 | High temperature profile control agent |
| US20100298175A1 (en) * | 2009-05-19 | 2010-11-25 | Jaleh Ghassemzadeh | Lost circulation material for oilfield use |
| WO2014139037A1 (en) * | 2013-03-15 | 2014-09-18 | University Of New Brunswick | Self-assembling polymer compositions for use in subterranean oil recovery |
| CN103265934A (en) * | 2013-05-02 | 2013-08-28 | 中国石油天然气股份有限公司 | Profile control agent for water injection well, and preparation method and application thereof |
| CN107501485A (en) * | 2017-08-21 | 2017-12-22 | 中国石油大学(北京) | A kind of oil field profile-controlling and plugging agent and preparation method thereof |
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Application publication date: 20210709 |